DE102023110580A1 - SOLID-STATE ENERGY STORAGE CELL AND METHOD FOR PRODUCING A SOLID-STATE ENERGY STORAGE CELL - Google Patents

Abstract

The invention relates to a solid-state energy storage cell, comprising: (i) a cylindrical housing; (ii) an electrode coil arranged in the cylindrical housing, wherein a circumferential gap is formed between the electrode coil and an inner wall of the cylindrical housing; (iii) wherein the electrode coil has a first electrode, in particular a cathode, a second electrode, in particular an anode, a first solid-state electrolyte layer and an insulation layer; (iv) wherein the first solid-state electrolyte layer is arranged between the first electrode and the second electrode, whereby ions can be exchanged between the first electrode and the second electrode, and wherein one of the first electrode and the second electrode is arranged between the insulation layer and the solid-state electrolyte layer; (v) wherein the first electrode has a first coating with a first active material, and the second electrode has a second coating with a second active material, and wherein the first active material and the second active material are designed such that during a first cyclization of the solid-state energy storage cell, due to an ion exchange between the first coating and the second coating, an increase in volume of one of the first coating or the second coating occurs and a decrease in volume of the other of the first coating or the second coating occurs, wherein the increase in volume is greater than the decrease in volume.

Description

The present invention relates to a solid-state energy storage cell, a battery module, a motor vehicle and a method, in particular a computer-implemented method, for producing a solid-state energy storage cell.

A solid-state battery or a solid-state energy storage cell that has an electrolyte made of a solid can enable a high energy density, long service life and high intrinsic safety, especially compared to a lithium-ion battery with a liquid electrolyte. This can be advantageous with regard to use in battery-powered electric vehicles. In comparison to lithium-ion batteries in a round cell format that have a liquid electrolyte, implementing a round cell format for solid-state batteries requires that a solid electrolyte layer contained therein must also be wound without damage when a layer structure is to be wound.

High external mechanical pressure may be required for reliable operation of a solid-state battery. The electrochemical properties of components and interfaces in a solid-state battery are influenced by the mechanical pressure present. This can affect interfaces between the electrodes and the solid electrolyte, as well as ion conduction between the electrodes.

The mechanical pressure required for reliable operation of a solid-state battery in pouch cell format can be applied to the pouch cell from the outside using external bracing devices, in particular using metal plates, springs or compression elements. In solid-state batteries in pouch cell format, a stack of cathode, solid-state electrolyte and anode can be welded into a so-called pouch film. A high pressure, in particular in the order of 100 bar, can then be exerted on the pouch cell from the outside. This ensures contact between the solid materials (anode-electrolyte, cathode-electrolyte) and thus stable cyclization of the cell.

For a given volume or weight for the solid-state battery, the use of the external bracing device leads to the additional components required for this, reducing the volume available for energy conversion and storage in the solid-state battery. This leads to a reduction in the energy density of the solid-state battery. In addition, the provision and assembly of the bracing device results in additional material and manufacturing costs. The components used in the bracing device, such as compression elements and spring elements, can also lead to a reduction in the service life of the solid-state battery, since the operation of the bracing device must also be guaranteed reliably over a long period of load under changing environmental conditions. In addition, considerable technical effort is required to achieve a homogeneous pressure distribution when bracing stacked cells in pouch format. For example, the high pressures mentioned can cause deformation of the metal plates.

For the serial use of solid-state batteries in mobile applications, such as vehicles, there is therefore a need to provide a solid-state battery in a manageable format. A solid-state battery in a round cell format could be suitable for this.

When arranging an electrode coil in a cylindrical housing, a gap is formed between the electrode coil and the cylindrical housing in order to enable the electrode coil to be fitted into the cylindrical housing. This gap can be disadvantageous during operation of the solid-state battery, as it can cause the layers of the electrode coil pressed together to at least partially separate, or the mechanical pressure within the electrode coil can decrease over time. This can have a detrimental effect on the operation of the solid-state battery.

The present invention is based on the object of providing a solid-state energy storage cell which is improved with regard to the above-mentioned problems.

This object is achieved according to the teaching of the independent claims. Various embodiments and developments of the invention are the subject of the subclaims.

A first aspect of the solution relates to a solid-state energy storage cell, comprising: (i) a cylindrical housing; (ii) an electrode coil arranged in the cylindrical housing, wherein a circumferential gap is formed between the electrode coil and an inner wall of the cylindrical housing; (iii) wherein the electrode coil has a first electrode, in particular a cathode, a second electrode, in particular an anode, a first solid-state electrolyte layer and an insulation layer; (iv) wherein the first solid-state electrolyte layer is arranged between the first electrode and the second electrode, whereby ions are exchanged between the first electrode and the second electrode and wherein one of the first electrode and the second electrode is arranged between the insulation layer and the solid-state electrolyte layer; (v) wherein the first electrode has a first coating with a first active material, and the second electrode has a second coating with a second active material, and wherein the first active material and the second active material are designed such that during a first cyclization of the solid-state energy storage cell due to an ion exchange between the first coating and the second coating, an increase in volume of one of the first coating or the second coating occurs and a decrease in volume of the other of the first coating or the second coating occurs, wherein the increase in volume is greater than the decrease in volume.

As used herein, the terms "comprises," "includes," "has," "includes," "comprising," "having," "with," or any other variation thereof are intended to cover non-exclusive inclusion. For example, a method or apparatus that comprises or has a list of elements is not necessarily limited to those elements, but may include other elements not expressly listed or that are inherent in such method or apparatus.

Furthermore, unless explicitly stated to the contrary, "or" refers to an inclusive "or" rather than an exclusive "or". For example, a condition A or B is satisfied by one of the following conditions: A is true (or exists) and B is false (or absent), A is false (or absent) and B is true (or exists), and both A and B are true (or exists).

As used herein, the terms "a" or "an" are defined to mean "one or more". The terms "another" and "another" and any other variation thereof are defined to mean "at least one other".

The term “plurality” as used here is to be understood as meaning “two or more”.

The term "configured" or "set up" to perform a specific function (and respective variations thereof) as used here is to be understood as meaning that the corresponding device is already in a design or setting in which it can perform the function or that it is at least adjustable - i.e. configurable - so that it can perform the function after the corresponding setting. The configuration can be carried out, for example, by setting parameters of a process sequence or switches or similar to activate or deactivate functionalities or settings. In particular, the device can have several predetermined configurations or operating modes, so that configuration can be carried out by selecting one of these configurations or operating modes.

The term "electrode coil" as used here refers in particular to a device which, as an assembly of a galvanic cell, in particular a battery cell, also serves to store chemical energy and release electrical energy. For this purpose, the electrode coil has at least two electrodes, namely an anode and a cathode, and a separator, in particular an electrically insulating separator, which has a solid electrolyte. The anode, separator and cathode are wound around an axis to form an electrode coil. Before electrical energy is released, stored chemical energy is converted into electrical energy. During a charging process of the battery cell, electrical energy supplied to the electrode coil is converted into chemical energy and stored. The electrodes can have a current conductor, in particular made of aluminum (Al) for the cathode and of copper (Cu) for the anode, wherein a thin layer made of a mixture of an active material, binder (e.g. PVDF, PTFE, CMC, SBR, LiPAA, PAA, etc.), conductive additives (carbon black, CNTs, carbon fibers, etc.) and a solid electrolyte can be applied to both sides of the current conductor. The current conductor can in particular be designed as a film.

The term "current conductor" as used here refers to an element which is made of a current-conducting material. It is used to conduct current between two geometrically separated points. In the present case, a current conductor is connected to an electrode stack. In particular, the current conductor is connected to all similar electrodes of an electrode stack, i.e. either to the cathodes or to the anodes. It goes without saying that a current conductor is not connected to the cathodes and anodes of an electrode stack at the same time, as this would lead to a short circuit. However, a current conductor can be connected to different electrodes of different electrode stacks, for example when the two electrode stacks are connected in series. At least one current conductor extends from the casing and can serve to connect the battery cells to the outside. The current conductor can be integral with one or more electrodes. A distinction between current conductor and electrode can be seen in the fact that the current conductor is not coated with active electrode material.

The term "active material" as used here refers in particular to a material that can be electrochemically active and that is suitable for coating electrodes for electrode windings for battery cells and in which ions, in particular lithium ions, can be stored. The active material for the cathode can in particular comprise lithium nickel manganese cobalt oxide (NMC), lithium cobalt oxide (LCO), lithium nickel oxide (LNO), lithium nickel cobalt aluminum oxide (NCA), lithium nickel manganese oxide (LMR), lithium manganese oxide (LMO), lithium iron phosphate (LFP), lithium manganese iron phosphate (LMFP), lithium nickel manganese oxide spinel (LNMO), a combination of the materials mentioned or another material. The active material for the anode can in particular comprise graphite, silicon (Si), silicon oxide (SiOx), silicon carbide (SiC), porous anode structures, in particular based on lithium lanthanum zirconium oxide (LLZO), lithium (Li), lithium metal, as well as combinations thereof or another material.

The term "electrolyte" or "solid-state electrolyte" as used here refers to a solid material through which ions can be conducted, thereby enabling current to be transported between electrodes of a battery, in particular between a cathode and an anode. Unlike electronic conductivity (through electrons) in the electrode materials, the electrolyte must be ionically conductive, i.e. conduct the electrical current by transporting charged atoms or molecules (ions). In particular, the electrolyte has a high electrical resistance. The electrolyte is advantageously chemically stable against decomposition in a wide temperature window and electrochemically stable in the largest possible voltage window. Ideally, it is non-toxic and non-flammable and has at least a high flash point and low heat of combustion. In particular, the electrolyte can comprise lithium phosphorus sulfur chloride (LPSCI) (argyrodite) or a combination of LPSCI with a polymer.

The solid-state energy storage cell according to the first aspect can achieve an overall increase in the volume of the electrode coil through the first charging process or the first cycling of the solid-state energy storage cell. The overall increase in volume can occur in particular in that an increase in volume of one of the first active material or the second active material through ion absorption is greater than a decrease in volume of the other of the first active material or the second active material through the corresponding ion release. It is also particularly conceivable that an increase in volume of one of the first active material or the second active material through ion release is greater than a decrease in volume of the other of the first active material or the second active material through the corresponding ion absorption. An overall increase in volume can also be achieved in this way. The overall increase in volume can ensure that the gap between the electrode coil and the cylindrical housing is closed and sufficient pressure is formed between the electrode coil and the cylindrical housing.

Preferred embodiments of the solid-state energy storage cell are described below, which can each be combined with one another and with the other aspects described in any way, unless this is expressly excluded or is technically impossible.

In some embodiments, the first coating comprises silicon, in particular silicon oxide and/or silicon carbide. This makes it possible to achieve a partially irreversible volume expansion through ion uptake or ion storage in the silicon as part of the ion exchange during the first charging or cyclization of the solid-state energy storage cell, in particular lithiation. In particular, silicon-containing materials experience a greater volume expansion due to the storage of ions than other materials, such as graphite-containing materials. In contrast, the volume expansion would be largely reversible in a graphite-containing material.

In some embodiments, the insulation layer has a second solid electrolyte layer. The additional solid electrolyte layer can enable better ion exchange within the electrode coil.

A second aspect of the solution concerns a battery module with several solid-state energy storage cells according to the first aspect.

A third aspect of the solution concerns a motor vehicle with an electric drive or a hybrid drive and a battery module according to the second aspect.

In some embodiments, the motor vehicle has a plurality of battery modules, which are in particular formed together to form a high-voltage battery.

A fourth aspect of the solution relates to a method, in particular a computer-implemented method, for producing a solid-state energy storage cell with the following steps: (i) providing an electrode coil comprising a first electrode, in particular a cathode, a second electrode, in particular an anode, a solid-state electrolyte layer and an insulation layer; (ii) wherein the solid-state electrolyte layer is arranged between the first electrode and the second electrode, whereby ions can be exchanged between the first electrode and the second electrode; (iii) and wherein one of the first electrode and the second electrode is arranged between the insulation layer and the solid-state electrolyte layer; wherein the first electrode has a first coating with a first active material, and the second electrode has a second coating with a second active material, and wherein the first active material and the second active material are designed such that during a first cyclization of the solid-state energy storage cell, an increase in volume of the second coating occurs due to an uptake of ions from the first coating, which is greater than a decrease in volume of the first coating due to a release of the ions; (ii) arranging the electrode coil in a cylindrical housing, whereby a circumferential gap is formed between the electrode coil and an inner housing wall of the cylindrical housing; (iii) carrying out a first cyclization of the solid-state energy storage cell, whereby the gap is closed due to an overall increase in volume resulting from the increase in volume of the second coating and the decrease in volume of the first coating.

Preferred embodiments of the solid-state energy storage cell are described below, which can each be combined with one another and with the other aspects described in any way, unless this is expressly excluded or is technically impossible.

In some embodiments, a total volume increase of the electrode coil due to the first cyclization is estimated before the first cyclization using material parameters of the first electrode and/or the second electrode. As a result, material parameters of the first electrode and/or the second electrode can be adjusted before the first cyclization if the first cyclization would likely result in an overall volume increase that is too small or too large. Furthermore, an overall volume increase that is too small or too large can be prevented.

In some embodiments, the estimation is carried out using a respective surface capacity of the first electrode and the second electrode and/or a degree of utilization of the first electrode, in particular the cathode. A surface capacity is to be understood in particular as a capacity per area, which is also dependent on a layer thickness of the first coating or the second coating. As a result, an adjustment of a layer thickness of the first coating and/or the second coating can be made on the basis of the estimate and, based thereon, an indirect adjustment of an overall volume increase can be made.

In some embodiments, the estimation is performed using predetermined voltage limits of the solid-state energy storage cell during operation. This allows the solid-state energy storage cell to be adapted for a particular application.

In some embodiments, a material parameter, in particular a thickness or a volume of the first and/or second coating, the first electrode and/or the second electrode, is adjusted using a result of the estimation. This allows the overall volume increase to be controlled more precisely.

In some embodiments, the electrode winding is provided by winding a layer structure comprising the first electrode, the second electrode, the solid electrolyte layer and the insulation layer around an axis, wherein during winding a predetermined tensile force is exerted on a section of the layer structure to be wound such that a predetermined force acts on a section to be wound radially in the direction of the axis. By exerting the tensile force during winding, an electrode winding is formed in which a mechanical pressure is formed within the electrode winding in the radial direction with respect to an axis around which the layer structure was wound by the applied tensile force.

In some embodiments, after the electrode coil has been provided, a fastening element is attached to the electrode coil, in particular an adhesive tape arranged around an axis of the electrode coil, to fix the wound state of the electrode coil. This can at least reduce loosening or unwinding of the electrode coil wound under the tensile force. This allows the electrode coil to be easily transported, in particular if it is to be installed at another location in the cylindrical housing.

The features and advantages explained with regard to the first aspect of the solution also apply to the other aspects described.

Further advantages, features and possible applications emerge from the following description of preferred embodiments in connection with the figures.

• 1 schematisch ein Flussdiagramm zur Veranschaulichung einer Ausführungsform eines Verfahrens;
• 2A schematisch einen ersten Schichtaufbau gemäß einer ersten Ausführungsform;
• 2B schematisch einen zweiten Schichtaufbau gemäß einer zweiten Ausführungsform;
• 3 schematisch eine Festkörperenergiespeicherzelle gemäß einer Ausführungsform; und
• 4A-4C schematisch verschiedene Zustände von Schichten mit Aktivmaterialen.

This shows

• 1 schematically a flow chart to illustrate an embodiment of a method;
• 2A schematically shows a first layer structure according to a first embodiment;
• 2B schematically shows a second layer structure according to a second embodiment;
• 3 schematically shows a solid-state energy storage cell according to an embodiment; and
• 4A-4C schematically different states of layers with active materials.

Throughout the figures, the same reference numerals are used for the same or corresponding elements.

In 1 is a schematic flow chart illustrating an embodiment of a method for producing a solid-state battery cell.

In a first step S110 of the method, an electrode coil 310 is provided, comprising a cathode 210, 280, an anode 230, 290, a solid electrolyte layer 250 and an insulation layer 270; wherein the solid electrolyte layer 250 is arranged between the cathode 210, 280 and the anode 230, 290, whereby ions can be exchanged between the cathode 210, 280 and the anode 230, 290, and wherein the cathode 210, 280 is arranged between the insulation layer 270 and the solid electrolyte layer 250; wherein the cathode 210, 280 has a first coating 220 with a first active material, and the anode 230, 290 has a second coating 240 with a second active material, and wherein the first active material and the second active material are designed such that during a first cyclization of the solid-state energy storage cell 300, due to an ion exchange between the first coating 220 and the second coating 240, an increase in volume of one of the first coating 220 or the second coating 240 occurs and a decrease in volume of the other of the first coating 220 or the second coating 240 occurs, wherein the increase in volume is greater than the decrease in volume.

In a further step S120 of the method, the electrode coil 310 is arranged in a cylindrical housing 330, whereby a circumferential gap 350 is formed between the electrode coil 310 and an inner wall of the cylindrical housing 330.

In a further step S130 of the method, a first cyclization of the solid-state energy storage cell 300 is carried out, which results in an overall increase in volume, whereby the gap 350 is closed and a sufficient pressure is formed between the electrode coil 310 and the cylindrical housing 330.

In 2A A first layer structure 200 for an electrode winding 310 of a solid-state energy storage cell 300 according to a first embodiment is shown schematically. The first layer structure 200 has layers arranged one on top of the other in the y-direction with respect to the schematically shown coordinate system. The first layer structure 200 extends in the x-direction on a layer path (not shown here), and the first layer structure 200 extends in the x-direction on a layer path (not shown here), and the first layer structure 200 extends in the x-direction on a layer path (not shown here). 2A The first layer structure 200 shown represents a section of such a path. This layer path can then be wound in practice to form the electrode winding 310.

The first layer structure 200 has an electrode, which is designed as a first cathode 210, and a further electrode, which is designed as a first anode 230. A separator layer, which is designed as a solid-state electrolyte layer 250, is arranged between the first cathode 210 and the first anode 230. The first cathode 210 has a first current conductor 215, which has a first coating 220 with a first active material on both sides. The first current conductor 215 has aluminum in particular. One of the two first coatings 220 with the first active material of the cathode is arranged on an outside of the first layer structure 200 with respect to the y-direction. The first anode 230 has a second current conductor 235, which has a second coating 240 with a second active material on both sides. The second current conductor 235 has copper in particular. The first anode 230 is arranged between two solid electrolyte layers 250, so that one of the two solid electrolyte layers 250 is arranged on another outer side of the first layer structure 200.

In 2B 1 shows a schematic representation of a second layer structure 260 for an electrode winding 310 of a solid-state energy storage cell 300 according to a second embodiment. The second layer structure 260 has layers arranged one on top of the other in the y-direction with respect to the schematically illustrated coordinate system. Analogous to 2A the second layer structure 260 extends in the x-direction on a path (not shown here), and the 2B The second layer structure 260 shown represents a section of such a layer path. This layer path can then be wound in practice to form an electrode coil 310.

The second layer structure 260 has a second cathode 280 and a second anode 290. A separator layer, which is designed as a solid electrolyte layer 250, is arranged between the second cathode 280 and the second anode 290. The second cathode 280 has a first current conductor 215, which has a first coating 220 with a first active material on one side. On another side, the first current conductor 215 is coated with an insulation layer 270, which is arranged in the y-direction on an outside of the second layer structure 260. The first current conductor 215 has aluminum in particular. The second anode 290 has a second current conductor 235, which has a second coating 240 with a second active material on one side. This second coating 240 with the second active material is arranged in the y-direction adjacent to the solid electrolyte layer 250. The second current conductor 235 comprises copper in particular.

In 3 , a solid-state energy storage cell 300 according to an embodiment is shown schematically in a plan view.

The solid-state energy storage cell 300 has an electrode coil 310 which is formed according to the 1 described method and arranged in a cylindrical housing 330. The electrode coil 310 was wound around an axis that runs parallel to the z-axis of the schematic coordinate system, whereby a layer-free inner core 340 was formed. Preferably, the core has a diameter of greater than 0.2 cm. The electrode coil 310 has a diameter that is smaller than an inner diameter of the cylindrical housing 330, whereby a gap 350 is formed between the electrode coil 310 and the cylindrical housing 330. A section 320 of a layer structure of the electrode coil 310 is shown in 3 Here, a first layer structure 200 according to 2A shown, wherein a repetition of the first layer structure 200 can be seen in the direction of the x-axis, since a first current conductor 215 is shown twice. This repetition is explained by the winding of the first layer structure 200 around the axis, which results in a repetition of the first layer structure 200 starting from the axis in the radial direction.

Alternatively, the electrode coil 310 may have the second layer structure 260 according to 2B or have a different layer structure.

So-called hybrid systems are also conceivable in which a small amount of a liquid electrolyte is added to the solid-state electrolyte layer 250.

In the 4A to 4C Different states of layers with active materials are shown schematically. In each of the figures, a structure with a first coating 220 with a first active material, a layer with a second active material 240 and a solid electrolyte layer 250 arranged between them is shown. This layer sequence is also shown in the first layer structure 200 according to 2A and the second layer structure 260 according to 2B The second active material comprises silicon. According to the embodiments of the 2A and 2B the first anode 230 or the second anode 290 has a second coating 240 with the second active material. The first coating 220 with the first active material can have one of the materials described above, such as NMC, LCO or another material mentioned.

The states 400, 410, 420 of the structure of the layers described below relate to the respective thicknesses of the first coating 220 and the second coating 240 or their relative thickness changes to one another, wherein the thicknesses of the first coating 220 and the second coating 240 extend in the y-direction according to the schematic coordinate system.

In 4A a structure is shown in a first state 400 after provision of the layer structure with the first coating 220, the second coating 240 and the solid electrolyte layer 250 arranged therebetween.

In 4B a structure in a second state 410 is shown after a first charge or after a first charging process. Due to the silicon in the second active material, the second active material expands during the first charge. This expansion is partially irreversible. In addition, the expansion due to the silicon, which occurs through intercalation or accumulation of lithium ions, is greater compared to other materials such as graphite or Lithium metal. At the same time as the second active material expands, the first active material contracts due to an ion exchange between the anode and cathode. However, this contraction is less than the expansion. This is due to the schematic thicknesses of the first coating 220 with the first active material and the second coating 240 with the second active material and the relative thicknesses according to 4A The result is an overall increase in volume of the electrode coil 310.

In 4C a structure in a third state 420 is shown after cycling following the first charging. A discharge process took place, whereby the change in thickness occurs in the other direction due to an ion exchange from the anode to the cathode. This means that the first active material and thus the first coating 220 expands and the second active material and thus the second coating 220 contracts. However, these changes in thickness during operation are smaller than the changes in thickness during the first charging process. The change in thickness from the first charging process to the first discharge or further cycling according to 4C is marked with d2.

A total thickness change in the y-direction of the electrode winding 310 is marked with d1. In the wound state, this total thickness change extends in the radial direction to the axis of the winding. This total thickness change determines the 3 described gap 350 is closed and an intrinsic pressure built up in the electrode winding 310 during a winding process is maintained or increased over the subsequent charging and discharging cycles.

Alternatively, it is conceivable to achieve the overall thickness change during a first discharge of the solid-state energy storage cell. In this case, the ions, in particular lithium ions, would already be stored in the corresponding active material, so that after the electrode coil 310 has been arranged in the cylindrical housing 330, an overall thickness change occurs during a discharge process through ion exchange into the other active material.

While at least one exemplary embodiment has been described above, it should be noted that a wide variety of variations thereon exist. It should also be noted that the exemplary embodiments described are merely non-limiting examples and are not intended to limit the scope, applicability, or configuration of the devices and methods described herein. Rather, the foregoing description will provide a guide to those skilled in the art for implementing at least one exemplary embodiment, it being understood that various changes in the operation and arrangement of the elements described in an exemplary embodiment may be made without departing from the subject matter set forth in the appended claims, as well as their legal equivalents.

REFERENCE SYMBOL LIST

100

flow chart

S110

Providing an electrode coil

S120

Arranging the electrode coil in a cylindrical housing

S130

Performing a first cyclization

200

first layer structure

210

First cathode

215

First current conductor

220

First coating with first active material

230

First anode

235

Second current conductor

240

Second coating with second active material

250

solid-state electrolyte layer

260

second layer structure

270

insulation layer

280

second cathode

290

Second anode

300

solid-state energy storage cell

310

electrode wrap

320

section of the electrode coil

330

Cylindrical housing

340

core

350

gap

410, 420, 430

First, second and third states

d1

total thickness change in y-direction

d2

Thickness change between charging and discharging

Claims (12)

Solid-state energy storage cell (300), comprising: A cylindrical housing (330); an electrode coil (310) arranged in the cylindrical housing (330), wherein a circumferential gap (350) is formed between the electrode coil (310) and an inner wall of the cylindrical housing (330); wherein the electrode coil (310) has a first electrode (210, 280), a second electrode (230, 290), a first solid-state electrolyte layer (250) and an insulation layer (270); wherein the first solid electrolyte layer (250) is arranged between the first electrode (210, 280) and the second electrode (230, 290), whereby ions can be exchanged between the first electrode (210, 280) and the second electrode (230, 290), and wherein one of the first electrode (210, 280) and the second electrode (230, 290) is arranged between the insulation layer (270) and the solid electrolyte layer (250); wherein the first electrode (210, 280) has a first coating (220) with a first active material, and the second electrode (230, 290) has a second coating (240) with a second active material, and wherein the first active material and the second active material are designed such that during a first cyclization of the solid-state energy storage cell (300) due to an ion exchange between the first coating (220) and the second coating (240) an increase in volume of one of the first coating (220) or the second coating (240) occurs and a decrease in volume of the other of the first coating (220) or the second coating (240) occurs, wherein the increase in volume is greater than the decrease in volume. Solid-state energy storage cell (300) according to claim 1 , wherein the second active material comprises silicon. Solid-state energy storage cell (300) according to claim 1 or 2 , wherein the insulation layer (270) has a second solid electrolyte layer (250). Battery module with several solid-state energy storage cells according to one of the preceding claims. Motor vehicle with an electric drive or a hybrid drive and a battery module according to claim 4 . Method (100) for producing a solid-state energy storage cell (300) with the following steps: Providing (S110) an electrode coil (310) comprising a first electrode (210, 280), a second electrode (230, 290), a solid-state electrolyte layer (250) and an insulation layer (270); wherein the solid-state electrolyte layer (250) is arranged between the first electrode (210, 280) and the second electrode (230, 290), whereby ions can be exchanged between the first electrode (210, 280) and the second electrode (230, 290), and wherein one of the first electrode (210, 280) and the second electrode (230, 290) is arranged between the insulation layer (270) and the solid-state electrolyte layer (250); wherein the first electrode (210, 280) has a first coating (220) with a first active material, and the second electrode (230, 290) has a second coating (240) with a second active material, and wherein the first active material and the second active material are designed such that during a first cycling of the solid-state energy storage cell (300), an increase in volume of the second coating (240) occurs due to an absorption of ions from the first coating (220), which is greater than a decrease in volume of the first coating (220) due to a release of the ions; Arranging (S120) the electrode coil (310) in a cylindrical housing (330), whereby a circumferential gap (350) is formed between the electrode coil (310) and an inner housing wall of the cylindrical housing (330); Performing (S130) a first cyclization of the solid-state energy storage cell (300), whereby the gap (350) is closed due to a total volume increase resulting from the volume increase of the second coating (240) and the volume decrease of the first coating (220). Procedure (100) according to claim 6 , wherein prior to the first cyclization, a total volume increase of the electrode coil (310) due to the first cyclization is estimated using material parameters of the first electrode and/or the second electrode. Procedure (100) according to claim 7 , wherein the estimation is carried out using a respective surface capacitance of the first electrode (210, 280) and the second electrode (230, 230). Procedure (100) according to claim 7 or 8 , wherein the estimation is carried out using predetermined voltage limits of the solid-state energy storage cell (300) during operation. Procedure (100) according to claim 7 until 9 , using a result of the estimation an adjustment of a material parameter of the first electrode and/or the second electrode is carried out. Method according to one of the Claims 6 until 10 , wherein the provision of the electrode winding is carried out by winding a layer structure (200, 260) comprising the first electrode (210, 280), the second electrode (230, 290), the solid electrolyte layer (250) and the insulation layer (270) around an axis, wherein during winding a predetermined tensile force is exerted on a section of the layer structure (200, 260) to be wound, such that a predetermined force acts radially in the direction of the axis through an already wound section. Method according to one of the Claims 6 until 11 , wherein after the provision of the electrode coil (310), a fastening element for fixing the wound state of the electrode coil (310) is attached to the electrode coil (310).

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