CN104157830A - Novel LiCo(1-x)AlxO2 electrode material and preparation method thereof - Google Patents
Novel LiCo(1-x)AlxO2 electrode material and preparation method thereof Download PDFInfo
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- CN104157830A CN104157830A CN201410316677.6A CN201410316677A CN104157830A CN 104157830 A CN104157830 A CN 104157830A CN 201410316677 A CN201410316677 A CN 201410316677A CN 104157830 A CN104157830 A CN 104157830A
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- electrode material
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- precipitation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention discloses a novel LiCo(1-x)AlxO2 electrode material and a preparation method thereof. LiNO3, Co(NO3), AlCl3 and NaOH are used as raw materials and a coprecipitation method preparation process is adopted; the preparation method comprises the steps of dissolving LiNO3, Co(NO3) and AlCl3 into ethanol solution proportionally, dissolving NaOH in another ethanol solution, dropwise adding mutually and mixing, filtering, separating precipitates out after full reaction, arranging the separated precipitates in an environment at 80 DEG C, drying, carrying out high-temperature calcination and grinding to obtain the finished product. The preparation method has the advantages of accurate quantity relative ratio control, high product purity, low calcination temperature, uniform components of the synthetic product, easiness in condition control, simplicity in operation and the like.
Description
Technical field
The present invention relates to a kind of anode material for lithium-ion batteries and preparation method thereof, particularly a kind of stratiform ternary transition metal oxide combination electrode material and preparation method thereof.
Background technology
At occurring in nature, elemental lithium is the lightest metal, and its atomic weight is 6.94g/mol, ρ=0.53g/cm
3, electrochemical equivalent minimum, is 0.26 gAh
-1standard electrode potential is the most negative, for-3.045 V, these features of elemental lithium have determined that it is a kind of very material of high-energy-density that has, lithium ion battery is exactly this characteristic of utilizing elemental lithium, lithium ion battery is a kind of rechargeable battery, mainly relies on lithium ion between positive pole and negative pole, to move work.In charge and discharge process, Li
+between two electrodes, come and go and embed and deintercalation, when rechargable battery, Li
+from anodal deintercalation, embed negative pole through electrolyte, negative pole is in rich lithium state; Contrary when electric discharge.Lithium ion battery gains great popularity because of advantages such as its voltage are high, energy density is high, have extended cycle life, environmental pollution is little, but along with the fast development of electronic information technology, the performance of lithium ion battery is also had higher requirement.
The selection of material is the first element that affects performance of lithium ion battery.From material angle, the cycle performance factor of material further develops restriction lithium battery, in the cyclic process of battery, cannot continue the de-lithium of embedding lithium thereby may be on the one hand that changes in crystal structure is too fast in cyclic process, may be to cause active material and electrolyte that side reaction occurs too early to make the too fast consumption of electrolyte and then affect to circulate because active material and corresponding electrolyte cannot generate fine and close SEI film uniformly on the one hand.Therefore developing high performance electrode material is the key that improves battery performance.
Common anode material for lithium-ion batteries mainly contains cobalt acid lithium, the LiMn2O4 of spinel structure and the LiFePO4 of olivine structural of layer structure at present.Business-like lithium ion battery mainly adopts LiCoO
2as positive electrode, LiCoO
2there is fail safe and overcharge resistance performance problem, Co belongs to scarce resource, expensive, and metallic cobalt is easily to environment, its development space is restricted, reduce to a great extent the scope of application of boring series lithium ion battery, therefore fully utilize the features such as cycle performance that cobalt acid lithium is good, fully by molecular level mix, the synthetic collaborative composite lithium-inserting oxide of multielement of method such as doping, coated and finishing, can reduce the content of electrode material Co, and employing doped with metal elements, can be to LiCoO
2lattice structure play certain support and stabilization, effectively suppress the phase transformation of cell configuration in charge and discharge process and subside, to reach the object of the safety, cycle performance and the discharge platform that improve material, the therefore LiCo of doped with Al
1-xal
xo
2electrode material has better development prospect.
Summary of the invention
The object of this invention is to provide a kind of anode material for lithium-ion batteries and preparation method thereof.
For realizing this purpose, the present invention is achieved through the following technical solutions:
Adopt the LiCo of coprecipitation legal system for doped with Al
1-xal
xo
2electrode material.
A kind of LiCo of doped with Al
1-xalr
xo
2electrode material preparation method, comprises the steps:
(1) with LiNO
3, Co (NO
3)
2and AlCl
3for raw material is by 1:(1-x): the mol ratio of x is dissolved in ethanolic solution, does not stop to shake up;
(2) get appropriate NaOH pressed powder and be dissolved in another part of ethanolic solution, do not stop to shake up;
(3) in the NaOH ethanolic solution in (2) the solution of joining in being (1) added drop-wise to the speed of 1 drop/sec, and constantly stir and react fully;
(4) in (3), solution, or not the time producing precipitation, stops splashing into;
(5) static a period of time, the solution in (4) by filtering to isolate precipitation;
(6) in will be (5), isolated precipitation be spread out and at 80 DEG C of dry 10h;
(7) drier postprecipitation in is (6) placed in to air 400-800 DEG C of calcining;
(8) gained solid abrasive after calcining is obtained to final products.
The present invention has following advantages and characteristic;
(1) amount is than can accurately controlling, and product purity is high;
(2) gained presoma particle diameter is little, and mixes;
(3) calcining heat is lower, and synthetic product component is even;
(4) favorable reproducibility, condition is easily controlled, simple to operate.
Embodiment
Embodiment mono-:
Get respectively a certain amount of LiNO
3, Co (NO
3)
2and AlCl
3powder, is dissolved in ethanolic solution by the mol ratio of 1:0.3:0.7, is mixed with the solution that metal ion concentration is 3mol/L; Separately getting appropriate NaOH pressed powder is dissolved in another part of ethanolic solution, be made into the NaOH ethanolic solution of 3mol/L, joined solion is added drop-wise in NaOH ethanolic solution with the speed of 1 drop/sec again, and constantly stirs and react fully, mixing speed is 60r/min; , not in the time producing precipitation, stop splashing into and static a period of time until solution, solution filter is isolated to precipitation, isolated precipitation is spread out and at 80 DEG C of dry 10h, after being dried, is placed in air 400 DEG C of calcinings again; Gained solid abrasive after calcining is obtained to final products.
Embodiment bis-:
Get respectively a certain amount of LiNO
3, Co (NO
3)
2and AlCl
3powder, is dissolved in ethanolic solution by the mol ratio of 1:0.5:0.5, is mixed with the solution that metal ion concentration is 3mol/L; Separately getting appropriate NaOH pressed powder is dissolved in another part of ethanolic solution, be made into the NaOH ethanolic solution of 3mol/L, joined solion is added drop-wise in NaOH ethanolic solution with the speed of 1 drop/sec again, and constantly stirs and react fully, mixing speed is 80r/min; , not in the time producing precipitation, stop splashing into and static a period of time until solution, solution filter is isolated to precipitation, isolated precipitation is spread out and at 80 DEG C of dry 10h, after being dried, is placed in air 600 DEG C of calcinings again; Gained solid abrasive after calcining is obtained to final products.
Embodiment tri-:
Get respectively a certain amount of LiNO
3, Co (NO
3)
2and AlCl
3powder, is dissolved in ethanolic solution by the mol ratio of 1:0.7:0.3, is mixed with the solution that metal ion concentration is 3mol/L; Separately getting appropriate NaOH pressed powder is dissolved in another part of ethanolic solution, be made into the NaOH ethanolic solution of 3mol/L, joined solion is added drop-wise in NaOH ethanolic solution with the speed of 1 drop/sec again, and constantly stirs and react fully, mixing speed is 100r/min; , not in the time producing precipitation, stop splashing into and static a period of time until solution, solution filter is isolated to precipitation, isolated precipitation is spread out and at 80 DEG C of dry 10h, after being dried, is placed in air 800 DEG C of calcinings again; Gained solid abrasive after calcining is obtained to final products.
Claims (5)
1. a LiCo
1-xal
xo
2the preparation method of electrode material, is characterized in that, this preparation method carries out according to the following steps:
(1) with LiNO
3, Co (NO
3)
2and AlCl
3for raw material is by 1:(1-x): the mol ratio of x is dissolved in ethanolic solution, does not stop to shake up;
(2) get appropriate NaOH pressed powder and be dissolved in another part of ethanolic solution, do not stop to shake up;
(3) in the NaOH ethanolic solution in (2) the solution of joining in being (1) added drop-wise to the speed of 1 drop/sec, and constantly stir and react fully;
(4) in (3), solution, or not the time producing precipitation, stops splashing into;
(5) static a period of time, the solution in (4) by filtering to isolate precipitation;
(6) in inciting somebody to action (5), isolated precipitation is spread out at 80 DEG C of dry 10h.
2. (7) more dried precipitation in being (6) placed in to air calcines;
(8) gained solid abrasive after calcining is obtained to final products.
3. a kind of LiCo according to claim 1
1-xal
xo
2electrode material preparation method, is characterized in that, the X value scope in step in is (1) 0.3≤X≤0.7.
4. a kind of LiCo according to claim 1
1-xal
xo
2electrode material preparation method, is characterized in that, step (3) in the agitating mode that adopts be mechanical agitation, mixing speed is 60-100 r/min.
5. a kind of LiCo according to claim 1
1-xal
xo
2electrode material preparation method, is characterized in that, step (7) in institute's calcining heat be controlled within the scope of 400-800 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410316677.6A CN104157830A (en) | 2014-07-06 | 2014-07-06 | Novel LiCo(1-x)AlxO2 electrode material and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410316677.6A CN104157830A (en) | 2014-07-06 | 2014-07-06 | Novel LiCo(1-x)AlxO2 electrode material and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104157830A true CN104157830A (en) | 2014-11-19 |
Family
ID=51883283
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|---|---|---|---|
| CN201410316677.6A Pending CN104157830A (en) | 2014-07-06 | 2014-07-06 | Novel LiCo(1-x)AlxO2 electrode material and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1389939A (en) * | 2001-06-04 | 2003-01-08 | 中国科学院成都有机化学研究所 | Method of synthesizing LiCo1-xMxO2 as positive electrode material for lithium ion accmulator |
| CN1417874A (en) * | 2002-11-28 | 2003-05-14 | 清华大学 | Prepn of high-rate lithium ion battery cathode material |
| CN101734728A (en) * | 2008-11-26 | 2010-06-16 | 深圳市比克电池有限公司 | Preparation method of lithium ion battery anode material |
| CN103647074A (en) * | 2013-12-25 | 2014-03-19 | 西安物华新能源科技有限公司 | High-rate type lithium cobaltate and preparation method thereof |
-
2014
- 2014-07-06 CN CN201410316677.6A patent/CN104157830A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1389939A (en) * | 2001-06-04 | 2003-01-08 | 中国科学院成都有机化学研究所 | Method of synthesizing LiCo1-xMxO2 as positive electrode material for lithium ion accmulator |
| CN1417874A (en) * | 2002-11-28 | 2003-05-14 | 清华大学 | Prepn of high-rate lithium ion battery cathode material |
| CN101734728A (en) * | 2008-11-26 | 2010-06-16 | 深圳市比克电池有限公司 | Preparation method of lithium ion battery anode material |
| CN103647074A (en) * | 2013-12-25 | 2014-03-19 | 西安物华新能源科技有限公司 | High-rate type lithium cobaltate and preparation method thereof |
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Application publication date: 20141119 |