CN103151529A - Lithium-ion battery and manufacture method thereof - Google Patents
Lithium-ion battery and manufacture method thereof Download PDFInfo
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- CN103151529A CN103151529A CN2013100926759A CN201310092675A CN103151529A CN 103151529 A CN103151529 A CN 103151529A CN 2013100926759 A CN2013100926759 A CN 2013100926759A CN 201310092675 A CN201310092675 A CN 201310092675A CN 103151529 A CN103151529 A CN 103151529A
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a lithium-ion battery and a manufacture method thereof, wherein the lithium-ion battery comprises a battery shell, an array of electrodes and electrolyte. The array of electrodes and electrolyte are sealingly contained in the battery shell; the array of electrodes comprises a positive pole, a diaphragm and a negative pole, wherein the positive pole contains positive active materials; and the positive active materials comprise positive active objects, conductive agents and adhesives, wherein carbon nanotubes with polar groups in the positive materials are used as conductive agents or mixed conductive agents. Compared with the prior art, by using carbon nanotubes with polar groups in the positive materials as conductive agents or mixed conductive agents, the lithium-ion battery disclosed by the invention achieves more uniform dispersion effect in the furnish preparation of the positive pole, and a pole piece is high in compacted density, smooth in surface and free of dusting, soft, and good in electrical conductivity; and the carbon nanotubes can improve the yield of the pole piece, is good in electrical conductivity, suitable for high rate charging and discharging, excellent in cycling performance, and can be large-scale industrially used in lithium-ion batteries.
Description
Technical field
The present invention relates to a kind of lithium ion battery field, relate in particular to a kind of lithium ion battery and preparation method thereof.
Background technology
Lithium ion battery has higher energy density, and the scope of application is wider, is a kind of repeatedly used electrochemical energy, and because lithium secondary battery has higher energy density, the shape volume of lithium secondary battery enters into variation in recent years, as; Compact apparatus, digital equipment, communication equipment and multiple small portable apparatus.
The past people adopt the ni-mh nickel separation cell as the electrochemical energy of the equipment of use, because their voltage is low, build is large, not portable, can't use on mini-plant, so along with the electronic apparatus new product is constantly developed renewal, ni-mh nickel separation cell source does not reach the miniaturization high-energy-density and lighting is used.
The lithium ion battery aspect, as; Positive electrode, negative material, electrolyte, adhesive, conductive agent, amberplex etc. are continued to optimize and are goed deep into developmental research, and develop multiple multipolarization new type lithium ion battery material.As; Positive electrode lithium nickel cobalt manganese oxygen, lithium nickel oxygen, lithium nickel cobalt alumina, lithium manganese oxygen, LiFePO4, lithium cobalt oxygen etc., its use are that one or more mix use.Negative pole comprises Delanium, native graphite, synthetic amorphous carbon, oil coke, silicon materials, alloy material, hard carbon etc., and its use is that one or more mix use.Electrolyte contains the mixed solvent of chain acid esters and ring-type acid esters, the chain acid esters is selected from dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate, ethyl propyl carbonic acid ester, diphenyl carbonate, methyl acetate, ethyl acetate, methyl propionate, ethyl propionate etc., and its use is that one or more mix use.Lithium proton exchange diaphragm paper claims again the polyethylene film, as; Select PP, PE, the laminated spelling diaphragm paper of PP three, individual layer PE barrier film and wherein a kind of.Organic polymer binder, as; Vinylidene fluoride is lithium ion battery a kind of adhesive commonly used.Along with the continuous Application and Development of novel device, electrochemical energy also will further improve the exploitation energy, so industry researcher and the various materials of lithium ion battery are studied and develop.
Conductive agent is the main relation that plays the mobile speed of electronics diffusion in battery, conductive agent content in battery also can be described as the conductivity height of battery conductive agent, usually we use conductive agent to be acetylene black, carbon black, graphite powder etc. in lithium ion battery plus-negative plate, the scope of application is in 0.8%～10%(of active material weight) between, the use content of conductive agent can cause the capacity of battery low very little the time, Cycle Difference, the large other problem that waits of internal resistance; Conductive agent can cause the utilance of active matter low when using content too many, the electrode plates problem such as harden.Because conductive agent acetylene black, carbon black specific area are larger, particle diameter is less, to adopt the some contact when normal the use, therefore for guaranteeing electric conductivity, must there be enough content could effectively guarantee the electric conductivity of all active materials, and be easy to cause skewness, thereby cause the content of the active material of whole pole piece to be occupied by conductive agent.The carbon nano-tube of employing is arranged as conductive agent in prior art, the carbon nanotube dispersed inequality easily occurs, the serious situation of reuniting.
Therefore, be necessary to propose an a kind of problem of improving one's methods to overcome lithium ion anode employing point contact conductive agent in prior art.
Summary of the invention
The objective of the invention is provides a kind of performance good lithium ion battery in order to overcome defects.
Another object of the present invention is to provide a kind of preparation method of lithium ion battery.
for reaching aforementioned purpose, a kind of lithium ion battery of the present invention, it comprises: battery container, electrode group and electrolyte, described electrode group and electrolyte sealing are contained in described battery container, described electrode group comprises the positive pole that contains positive electrode active materials, barrier film and negative pole, described positive electrode active materials comprises positive electrode active material, conductive agent and adhesive, wherein adopt carbon nano-tube with polar group as conductive agent or hybrid conductive agent, the percentage by weight of described carbon nano-tube and positive electrode active material is 0.2%-10%, on described carbon nano-tube, the substitution value of polar group is 0.2-1.5.
According to one embodiment of present invention, the polar group on described carbon nano-tube comprise-CHO ,-COOH ,-OH ,-OCOOH.
According to one embodiment of present invention, described carbon nano-tube with polar group is single or multiple lift carbon pipe.
According to one embodiment of present invention, described positive electrode active material is at least wherein one or more of LiCoO2, LiMn2O4, LiFePO4, LiFeMnPO4, LiCoxNiyMnzO2, LiNiO2 and mixes.
According to one embodiment of present invention, the electrolyte in described electrolyte comprises one or more mixtures that are selected from lithium perchlorate, chlorine lithium aluminate, lithium hexafluoro phosphate, LiBF4, lithium halide, fluorocarbon based fluorine oxygen lithium phosphate and fluorocarbon based Sulfonic Lithium.
According to one embodiment of present invention, described lithium ion battery is shaped as circular batteries or rectangular cell.
For reaching aforementioned another purpose, the preparation method of a kind of lithium ion battery of the present invention, wherein this lithium battery comprises: battery container, electrode group and electrolyte, described electrode group and electrolyte sealing are contained in described battery container, described electrode group comprises positive pole, barrier film and the negative pole that contains positive electrode active materials, described positive electrode active materials comprises positive electrode active material, conductive agent and adhesive, it is characterized in that:
The preparation method of described lithium ion battery comprises:
(1) anodal preparation
Positive active material, anodal conductive agent carbon nano-tube or the agent of carbon nano-tube hybrid conductive, anodal adhesive and anodal solvent are stirred, make anode sizing agent, this slurry is coated on plus plate current-collecting body equably, drying obtains anode pole piece after cutting, rolling again; Wherein as conductive agent or hybrid conductive agent, the content of described carbon nano-tube and the percentage by weight of positive electrode active material are 0.2%-10% with the carbon nano-tube of polar group in anodal conductive agent employing; On described carbon nano-tube, the substitution value of polar group is 0.2-1.5;
(2) negative pole preparation
Negative electrode active material, cathode conductive agent, negative pole adhesive and negative pole solvent are stirred, make cathode size, then this slurry is coated on negative current collector equably, drying obtains cathode pole piece after cutting, rolling;
(3) assembling
Above-mentioned positive and negative electrode pole piece and membrane coil are coiled into the electrode group of square lithium ion battery, and this electrode assembling is entered in the square of preliminary dimension or circular batteries shell, and inject the electrolyte configure, then change into, partial volume.
According to one embodiment of present invention, the polar group of described carbon nano-tube comprise-CHO ,-COOH ,-OH ,-OCOOH.
According to one embodiment of present invention, described carbon nano-tube with polar group is single or multiple lift carbon pipe.
According to one embodiment of present invention, the electrolyte in described electrolyte comprises one or more mixtures that are selected from lithium perchlorate, chlorine lithium aluminate, lithium hexafluoro phosphate, LiBF4, lithium halide, fluorocarbon based fluorine oxygen lithium phosphate and fluorocarbon based Sulfonic Lithium.
Beneficial effect of the present invention: compared with prior art, the present invention is by using carbon nano-tube with polar group as conductive agent or hybrid conductive agent in positive electrode, in the lithium ion cell positive with slurry and obtain than the Uniform Dispersion effect, the pole piece compacted density is high, smooth surface is dry linting not, pole piece is soft, good conductivity, use this kind carbon nano-tube can improve the rate of finished products of pole piece, have and conduct electricity very well, be fit to high rate charge-discharge, excellent cycle performance can use in lithium ion battery in extensive industrialization.
Embodiment
Below in conjunction with specific embodiment, the present invention is done further detailed description.
Alleged " embodiment " or " embodiment " refer to be contained in special characteristic, structure or the characteristic at least one implementation of the present invention herein.Different local in this manual " in one embodiment " that occur not are all to refer to same embodiment, neither be independent or the embodiment mutually exclusive with other embodiment optionally.
Lithium ion battery of the present invention, it comprises battery container, electrode group and electrolyte, described electrode group and electrolyte sealing are contained in described battery container.In this embodiment, being shaped as of described lithium-ion battery shell is square, and in other embodiments, the shape of this lithium ion battery can be circular or other shapes.
The electrode group of lithium ion battery of the present invention comprises reels or the stacked positive pole that contains positive electrode active materials, barrier film and negative pole successively.
The positive pole of lithium ion battery of the present invention comprises that collector aluminium foil and slurry apply and/or be filled in the positive electrode active materials on collector.Wherein, collector can be selected from aluminium foil, Copper Foil, nickel plated steel strip or Punching steel strip.
Positive electrode active materials in lithium ion cell positive of the present invention comprises positive electrode active material, conductive agent and adhesive.
Wherein, in one embodiment of the invention, positive electrode active material is at least wherein one or more of LiCoO2, LiMn2O4, LiFePO4, LiFeMnPO4, LiCoxNiyMnzO2, LiNiO2 and mixes, in the present invention, the shape of positive electrode active material is unrestricted, can be the shape of rule, can be also irregular shape.
Conductive agent in lithium ion battery of the present invention in positive electrode active materials adopts is single or multiple lift carbon nano-tube with polar group, in positive electrode active materials, the percentage by weight of the content of the carbon nano-tube of using and positive electrode active material is 0.2%-10%, the polar group that replaces on described carbon nano-tube includes but not limited to-CHO ,-COOH ,-OH ,-OCOOH, the substitution value of polar group is 0.2-1.5.
Carbon nano-tube is a kind of One-dimensional Quantum material with special construction, has typical stratiform hollow structure feature, and there is the end cap sealing at the two ends of general pipe.The pipe shaft of carbon nano-tube is the director circle pipe, and its radial dimension is nanometer scale, and axial dimension can reach the micron dimension structure, is comprised of hexagonal carbon ring structure unit, and terminal cap moiety is to contain the polygonized structure that pentagon and hexagonal carbocyclic ring form.Carbon nano-tube can only have one deck also multilayer can be arranged, and is called single-layer carbon nano-tube and multilayer carbon nanotube, and its diameter is generally 2～20nm, and the spacing between the synusia of formation carbon nano-tube is about 0.34nm.Carbon nano-tube is as monodimension nanometer material, and is lightweight, and hexagonal structure connects perfect, has many abnormal mechanics, electricity and chemical property.Therefore, in an embodiment of the present invention, described carbon nano-tube is all as anodal conductive agent.In other embodiments, this carbon nano-tube also can be mixed use with acetylene black, carbon black and graphite powder etc.
Lithium ion battery provided by the invention, the barrier film in its battery pack is arranged between positive pole and negative pole, has electrical insulation capability and liquid retainability energy, and is sealed in battery container together with positive pole, negative pole and electrolyte.Described barrier film can be selected from but be not limited to polyolefin micro porous polyolefin membrane, modified polypropene felt, polyethylene felt, glass mat, ultra-fine fibre glass paper vinylon felt or nylon felt and wettability microporous polyolefin film through welding or the bonding composite membrane that forms.
Lithium ion battery provided by the invention, the negative pole in its battery pack contain negative current collector and the negative electrode material layer that is coated on this negative current collector.Described negative material is unrestricted, and described negative electrode material layer generally includes the conductive agent that negative electrode active material, binding agent and selectivity contain.Described negative electrode active material can adopt various negative electrode active materials commonly used, for example material with carbon element.Wherein material with carbon element can be non-graphitic carbon, graphite or the charcoal that obtained by high-temperature oxydation by polyyne family macromolecule material, also can use other material with carbon element such as pyrolytic carbon, coke, organic polymer sinter, active carbon etc.Wherein the organic polymer sinter can be by the product with gained after the sintering such as phenolic resins, epoxy resin and charing.
The solvent that the present invention is used for positive electrode and negative material can be selected from 1-METHYLPYRROLIDONE (NMP), N, dinethylformamide (DMF), N, one or more in N-diethylformamide (DEF), methyl-sulfoxide (DMSO), oxolane (THF) and water and alcohols.The consumption of solvent can be coated on described collector described slurry and gets final product.In general, the consumption of solvent is that to make the concentration of positive active material in slurries or negative electrode active material be the 40-90 % by weight, is preferably the 50-85 % by weight.
Lithium ion battery of the present invention, the electrolyte in its electrolyte are the lithium salts that is selected from lithium perchlorate, chlorine lithium aluminate, lithium hexafluoro phosphate, LiBF4, lithium halide, fluorocarbon based fluorine oxygen lithium phosphate and fluorocarbon based Sulfonic Lithium, use wherein one or more mixtures.Wherein be used for dissolving electrolytical solvent and can be chosen as one or more of nonaqueous solvents vinyl carbonate (EC), diethyl carbonate (DEC), dimethyl carbonate (DMC), methyl ethyl carbonate (EMC), propylene carbonate (PC), methyl formate (MF), methyl acrylate (MA), methyl butyrate (MB) ethyl acetate (EP), ethylene sulfite (ES), propylene sulfite (PS), methyl sulfide (DMS), diethyl sulfite (DES), wherein there is no particular limitation for the ratio of various solvents.As preferred embodiment of the present invention, described electrolyte can also optionally contain additive, for example, can select VC commonly used as film for additive or the anti-overcharge electric additive of some other biphenyl class etc.
The preparation method of lithium ion battery of the present invention comprises and will between positive pole and negative pole, barrier film be set, and consists of the electrode group, and this electrode group is contained in battery container, injects electrolyte, and is then that battery container is airtight.Its concrete preparation process is as follows:
Embodiment 1
(1) anodal preparation
At first will be placed in nmp solvent with carbon nano-tube and the dispersant PVP of polar group, through sand milling, make and contain carbon nano-tube 5%(weight) carbon nano-tube solution.
By LiFePO4: the weight ratio of carbon nano-tube: PVDF:NMP=100:2:3:85 prepares with slurry solution.Add the PVDF that weighs up to carry out stirring and dissolving 2 hours in carbon nano-tube solution, then the LiFePO4 that weighs up is added mentioned solution, then high-speed stirred 4 hours.Be coated with at last film-making, make positive plate.
(2) preparation of negative pole
Delanium and PVDF are mixed with the weight ratio of 94:6, the mixture that obtains is mixed by the weight ratio of 2:1 and NMP make cathode size.Again this slurry is coated on the Copper Foil collector equably, dry under 140 ° of C, obtain cathode pole piece after cutting, rolling, contain the Delanium of 2.5 grams on cathode pole piece.
(3) battery preparation
Above-mentioned positive and negative electrode pole piece and polypropylene diaphragm are wound into the electrode group of square lithium ion battery, and this electrode assembling is entered in 50mm * 34mm * 5mm cubic battery.And inject vinyl carbonate (EC): methyl ethyl carbonate (EMC) weight ratio is 3:7, and lithium salts is the electrolyte of the LiFP6 of 1M, then changes into, partial volume, completes the battery preparation.
In embodiment 1, the substitution value of the polar group of the carbon nano-tube of described lithium ion battery is 0.1, and being shaped as of described lithium ion battery case is square.In other embodiments, the shape of described battery case can be circular or other shapes, and its size is unrestricted.In this embodiment, described battery is lithium ion battery, and in other embodiments, this battery can be also lithium ion polymer battery.
Embodiment 2
In this embodiment 2, the substitution value of described carbon nano-tube is 0.2, and other are identical with embodiment 1.
Embodiment 3
In this embodiment 3, the substitution value of described carbon nano-tube is 0.4, and other are identical with embodiment 1.
Embodiment 4
In this embodiment 4, the substitution value of described carbon nano-tube is 0.8, and other are identical with embodiment 1.
Embodiment 5
In this embodiment 5, the substitution value of described carbon nano-tube is 1.2, and other are identical with embodiment 1.
Embodiment 6
In this embodiment 6, the substitution value of described carbon nano-tube is 1.5, and other are identical with embodiment 1.
Embodiment 7
In this embodiment 7, the substitution value of described carbon nano-tube is 1.7, and other are identical with embodiment 1.
Embodiment 8
In this embodiment 8, described carbon nano-tube is not with polar group, and other are identical with embodiment 1.
Embodiment 9
In this embodiment 9, the substitution value of described carbon nano-tube is 0.8, and the percentage by weight of itself and active matter is 0.1%, and other are identical with embodiment 1.
Embodiment 10
In this embodiment 10, the percentage by weight of described carbon nano-tube and active matter is 0.2%, and other are identical with embodiment 9.
Embodiment 11
In this embodiment 11, the percentage by weight of described carbon nano-tube and active matter is 5%, and other are identical with embodiment 9.
Embodiment 12
In this embodiment 12, the percentage by weight of described carbon nano-tube and active matter is 10%, and other are identical with embodiment 9.
Embodiment 13
In this embodiment 13, the percentage by weight of described carbon nano-tube and active matter is 12%, and other are identical with embodiment 9.
Embodiment 14
Adopting acetylene black is anodal conductive agent, and the with slurry weight ratio is LiFePO4: acetylene black: PVDF:NMP=100:5:3:125.Add the PVDF that weighs up to carry out stirring and dissolving 2 hours in nmp solution, subsequently LiFePO4 and the acetylene black that weighs up is added mentioned solution, high-speed stirred 4 hours.Then be coated with film-making, make positive plate.In this embodiment, the preparation of the preparation of negative pole and battery please refer to embodiment 1.
Performance of lithium ion battery test to preparation
(1) compacted density test
Test result sees Table 1.
(2) resistivity measurement
Test result sees Table 1.
(3) anodal specific capacity test
Test result sees Table 1.
(4) cycle performance test
Test result sees Table 1.
(5) the charging and discharging electric current is 0.5C, and the charging and discharging voltage range is 2.0-3.8V.
Table 1
By the performance test results as can be known:
(1) the carbon nano-tube compacted density with polar group is high, and resistivity is less than normal, and anodal specific capacity is large, good cycle, excellent performance;
When (2) percentage by weight of carbon nano-tube and positive electrode active material was 0.2-10%, the compacted density of battery was higher, and resistivity is less, and anodal specific capacity is larger, and cycle performance is better.
When (3) on carbon nano-tube, the substitution value of polar group was 0.2-1.5, the real density of battery was higher, and resistivity is less, and anodal specific capacity is larger, and cycle performance is better.
Lithium ion battery of the present invention is by using carbon nano-tube with polar group as conductive agent or hybrid conductive agent in positive electrode, in the lithium ion cell positive with slurry and obtain than the Uniform Dispersion effect, the pole piece compacted density is high, and smooth surface is dry linting not, and pole piece is soft, good conductivity, use this kind carbon nano-tube can improve the rate of finished products of pole piece, have and conduct electricity very well, be fit to high rate charge-discharge, excellent cycle performance can use in lithium ion battery in extensive industrialization.
Above-mentioned explanation has fully disclosed the specific embodiment of the present invention.It is pointed out that being familiar with any change that the person skilled in art does the specific embodiment of the present invention does not all break away from the scope of claims of the present invention.Correspondingly, the scope of claim of the present invention also is not limited only to previous embodiment.
Claims (10)
1. lithium ion battery, it comprises: battery container, electrode group and electrolyte, described electrode group and electrolyte sealing are contained in described battery container, described electrode group comprises positive pole, barrier film and the negative pole that contains positive electrode active materials, described positive electrode active materials comprises positive electrode active material, conductive agent and adhesive
It is characterized in that: adopt carbon nano-tube with polar group as conductive agent or hybrid conductive agent, the percentage by weight of described carbon nano-tube and positive electrode active material is 0.2%-10%; On described carbon nano-tube, the substitution value of polar group is 0.2-1.5.
2. lithium ion battery according to claim 1 is characterized in that: the polar group on described carbon nano-tube comprises-CHO ,-COOH ,-OH ,-OCOOH.
3. lithium ion battery according to claim 1, it is characterized in that: described carbon nano-tube with polar group is single or multiple lift carbon pipe.
4. lithium ion battery according to claim 1 is characterized in that: described positive electrode active material is at least wherein one or more of LiCoO2, LiMn2O4, LiFePO4, LiFeMnPO4, LiCoxNiyMnzO2, LiNiO2 and mixes.
5. lithium ion battery according to claim 1, it is characterized in that: the electrolyte in described electrolyte comprises one or more mixtures that are selected from lithium perchlorate, chlorine lithium aluminate, lithium hexafluoro phosphate, LiBF4, lithium halide, fluorocarbon based fluorine oxygen lithium phosphate and fluorocarbon based Sulfonic Lithium.
6. lithium ion battery according to claim 1 is characterized in that: it is circular batteries or rectangular cell.
7. the preparation method of a lithium ion battery, wherein this lithium battery comprises: battery container, electrode group and electrolyte, described electrode group and electrolyte sealing are contained in described battery container, described electrode group comprises positive pole, barrier film and the negative pole that contains positive electrode active materials, described positive electrode active materials comprises positive electrode active material, conductive agent and adhesive, it is characterized in that:
The preparation method of described lithium ion battery comprises:
(1) anodal preparation
Positive active material, anodal conductive agent carbon nano-tube or the agent of carbon nano-tube hybrid conductive, anodal adhesive and anodal solvent are stirred, make anode sizing agent, this slurry is coated on plus plate current-collecting body equably, drying obtains anode pole piece after cutting, rolling again; Wherein as conductive agent or hybrid conductive agent, the content of described carbon nano-tube and the percentage by weight of positive electrode active material are 0.2%-10% with the carbon nano-tube of polar group in anodal conductive agent employing; On described carbon nano-tube, the substitution value of polar group is 0.2-1.5;
(2) negative pole preparation
Negative electrode active material, cathode conductive agent, negative pole adhesive and negative pole solvent are stirred, make cathode size, then this slurry is coated on negative current collector equably, drying obtains cathode pole piece after cutting, rolling;
(3) assembling
Above-mentioned positive and negative electrode pole piece and membrane coil are coiled into the electrode group of square lithium ion battery, and this electrode assembling is entered in the square of preliminary dimension or circular batteries shell, and inject the electrolyte configure, then change into, partial volume.
8. the preparation method of lithium ion battery according to claim 7 is characterized in that: the polar group of described carbon nano-tube comprises-CHO ,-COOH ,-OH ,-OCOOH.
9. the preparation method of described lithium ion battery according to claim 7, it is characterized in that: described carbon nano-tube with polar group is single or multiple lift carbon pipe.
10. the preparation method of described lithium ion battery according to claim 7, it is characterized in that: the electrolyte in described electrolyte comprises one or more mixtures that are selected from lithium perchlorate, chlorine lithium aluminate, lithium hexafluoro phosphate, LiBF4, lithium halide, fluorocarbon based fluorine oxygen lithium phosphate and fluorocarbon based Sulfonic Lithium.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105206839A (en) * | 2014-06-30 | 2015-12-30 | 比亚迪股份有限公司 | Modified carbon nano tube and preparation method thereof, lithium ion battery anode and preparation method thereof and lithium ion battery |
| CN107644977A (en) * | 2016-07-22 | 2018-01-30 | 清华大学 | The preparation method of lithium ion cell electrode |
| CN107836049A (en) * | 2015-07-15 | 2018-03-23 | 罗伯特·博世有限公司 | Barrier film for lithium ion battery and preparation method thereof and lithium ion battery |
| CN108511692A (en) * | 2017-12-21 | 2018-09-07 | 中国石油大学(北京) | A kind of lithium ion cell electrode and preparation method thereof |
| CN110729454A (en) * | 2019-10-22 | 2020-01-24 | 深圳中华自行车(集团)股份有限公司 | Battery positive pole piece and preparation method thereof |
| WO2023082925A1 (en) * | 2021-11-12 | 2023-05-19 | 宁德时代新能源科技股份有限公司 | Positive electrode material, positive electrode plate, secondary battery, battery module, battery pack, and electrical device |
-
2013
- 2013-03-21 CN CN2013100926759A patent/CN103151529A/en active Pending
Non-Patent Citations (1)
| Title |
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| ALBERTO VARZI,ET AL.: ""The effects of pristine and carboxylated multi-walled carbon nanotubes as conductive additives on the performance of LiNi0.33Co0.33Mn0.33O2 and LiFePO4 positive electrodes"", 《ELECTROCHIMICA ACTA》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105206839A (en) * | 2014-06-30 | 2015-12-30 | 比亚迪股份有限公司 | Modified carbon nano tube and preparation method thereof, lithium ion battery anode and preparation method thereof and lithium ion battery |
| CN105206839B (en) * | 2014-06-30 | 2019-04-19 | 比亚迪股份有限公司 | A kind of modified carbon nano-tube and preparation method thereof, lithium ion cell positive and preparation method thereof and lithium ion battery |
| CN107836049A (en) * | 2015-07-15 | 2018-03-23 | 罗伯特·博世有限公司 | Barrier film for lithium ion battery and preparation method thereof and lithium ion battery |
| CN107644977A (en) * | 2016-07-22 | 2018-01-30 | 清华大学 | The preparation method of lithium ion cell electrode |
| CN107644977B (en) * | 2016-07-22 | 2020-09-25 | 清华大学 | Preparation method of lithium ion battery electrode |
| CN108511692A (en) * | 2017-12-21 | 2018-09-07 | 中国石油大学(北京) | A kind of lithium ion cell electrode and preparation method thereof |
| CN110729454A (en) * | 2019-10-22 | 2020-01-24 | 深圳中华自行车(集团)股份有限公司 | Battery positive pole piece and preparation method thereof |
| CN110729454B (en) * | 2019-10-22 | 2021-03-19 | 深圳中华自行车(集团)股份有限公司 | Battery positive pole piece and preparation method thereof |
| WO2023082925A1 (en) * | 2021-11-12 | 2023-05-19 | 宁德时代新能源科技股份有限公司 | Positive electrode material, positive electrode plate, secondary battery, battery module, battery pack, and electrical device |
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Application publication date: 20130612 |