CN102637849A - Preparation method of coating cathode material of lithium ion battery - Google Patents
Preparation method of coating cathode material of lithium ion battery Download PDFInfo
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- CN102637849A CN102637849A CN2012101361328A CN201210136132A CN102637849A CN 102637849 A CN102637849 A CN 102637849A CN 2012101361328 A CN2012101361328 A CN 2012101361328A CN 201210136132 A CN201210136132 A CN 201210136132A CN 102637849 A CN102637849 A CN 102637849A
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- limn
- magnesium
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- colloidal sol
- coating
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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
- 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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Abstract
The invention discloses a preparation method of a coating cathode material of a lithium ion battery. The preparation method comprises the following steps of: blending raw materials of MnO2 and Li2CO3; performing ball milling, mixing, drying and screening; performing calcining and insulating to obtain LiMn2O4 powder; dissolving magnesium isopropoxide and a latent solvent methylbenzene together to form a magnesium salt sol so as to obtain a magnesium salt sol coating solution; adding the LiMn2O4 powder into a coating phase ethyl ketone; controlling the weight ratio of the LiMn2O4 powder to the coating phase ethyl ketone to be 1:3; mixing by stirring, and adding the magnesium salt sol coating solution to obtain a coated product; and sintering, cooling and smashing the coated product.
Description
Technical field
The present invention relates to a kind of battery electrode material preparation method, relate in particular to a kind of lithium ion battery clad anode material preparation method.
Background technology
Battery is the power source of numerous electronic and electrical equipments.The fast development of traffic, communication and electronic information technology, deeply popularizing in people's life such as electric automobile, mobile phone and notebook computer all greatly promoted the progress of battery technology, so the novel battery product emerges in an endless stream.
Lithium ion battery becomes the available optimal power supplies in field such as logical, communication and electronic information technology because of it has advantages such as capacity height, light weight, volume be little.But it exists the not long problem of high-temperature cycle life when using as electrokinetic cell; Because the positive electrode of lithium ion battery is a LiMn2O4; LiMn2O4 is prone to take place the Jahn-Teller effect in the electrolyte of high temperature; Cause the manganese stripping, cave in, cause high-temperature cycle life to reduce thereby the LiMn2O4 structure takes place.To the research of this problem, mainly concentrate on the doping of each dvielement and the coating aspect of all kinds of materials.
Summary of the invention
A kind of lithium ion battery clad anode material preparation method provided by the invention when this material is used as anode material for lithium-ion batteries, has high temperature storage fail safe preferably and cyclical stability.
To achieve these goals, lithium ion battery clad anode material preparation method provided by the invention comprises the steps:
Step 1, preparation positive electrode: with MnO
2And Li
2CO
3For raw material by weight being to prepare burden in 1 ~ 1.5:3 ~ 4.5; Ball mill mixing, oven dry is sieved; 750 ℃ ~ 800 ℃ calcinings, insulation obtains LiMn
2O
4Powder.
Step 2, the preparation covering liquid: with the mix magnesium salts colloidal sol of formation of magnesium isopropoxide and cosolvent toluene, the weight concentration of magnesium salts is 10% ~ 20% in the colloidal sol, obtains magnesium salts colloidal sol covering liquid.
Step 3 coats: with LiMn
2O
4Powder joins and coats in the phase ethyl ketone; With LiMn
2O
4The part by weight of ethyl ketone is controlled at 1:3 to powder with coating mutually; After mixing 6 ~ 8 minutes, add above-mentioned magnesium salts colloidal sol covering liquid, obtain coating product, wherein element magnesium and LiMn
2O
4The mol ratio of central element manganese be 0.003 ~ 0.03.
Step 4, sintering: will coat product and carry out sintering, technological parameter is following: 400 ~ 600 ℃ of a sections, be incubated 8 ~ 10 hours, 800 ~ 950 ℃ of insulations of b section 3 ~ 5 hours, the cooling of c section obtains the LiMn that magnesium coats
2O
4
Step 5, fragmentation: with the LiMn of the cooled magnesium coating of sintering
2O
4Broken.
Preferably, in step 1, with MnO
2And Li
2CO
3Weight ratio is 1:3.
Preferably, in step 2, the weight concentration of magnesium salts is 15% in the colloidal sol.
Preferably, sintering process parameter is following in step 4: 500 ℃ of a sections are incubated 9 hours; 900 ℃ of insulations of b section 4 hours; The c section. cooling obtains the LiMn that magnesium coats
2O
4
Compared with prior art, advantage of the present invention is: adopt magnesium elements clad anode material LiMn
2O
4Powder, and, improved the high temperature storage fail safe and the cyclical stability of positive electrode through after the PROCESS FOR TREATMENT of optimizing, prolonged anodal useful life.
Embodiment
Embodiment one:
With MnO
2And Li
2CO
3For raw material by weight preparing burden for 1:3; Ball mill mixing, oven dry is sieved; 750 ℃ of calcinings, insulation obtains LiMn
2O
4Powder; With the magnesium salts colloidal sol that magnesium isopropoxide and cosolvent toluene mix and forms, the weight concentration of magnesium salts is 15% in the colloidal sol, obtains magnesium salts colloidal sol covering liquid; With LiMn
2O
4Powder joins and coats in the phase ethyl ketone; With LiMn
2O
4The part by weight of ethyl ketone is controlled at 1:3 to powder with coating mutually; After mixing 6 minutes, add above-mentioned magnesium salts colloidal sol covering liquid, obtain coating product, wherein element magnesium and LiMn
2O
4The mol ratio of central element manganese be 0.005; To coat product and carry out sintering, technological parameter is following: 500 ℃ of a sections are incubated 9 hours; 900 ℃ of insulations of b section 4 hours; The cooling of c section obtains the LiMn that magnesium coats
2O
4LiMn with the cooled magnesium coating of sintering
2O
4Broken.
Embodiment two:
With MnO
2And Li
2CO
3For raw material by weight preparing burden for 1:4; Ball mill mixing, oven dry is sieved; 800 ℃ of calcinings, insulation obtains LiMn
2O
4Powder; With the magnesium salts colloidal sol that magnesium isopropoxide and cosolvent toluene mix and forms, the weight concentration of magnesium salts is 10% in the colloidal sol, obtains magnesium salts colloidal sol covering liquid; With LiMn
2O
4Powder joins and coats in the phase ethyl ketone; With LiMn
2O
4The part by weight of ethyl ketone is controlled at 1:3 to powder with coating mutually; After mixing 8 minutes, add above-mentioned magnesium salts colloidal sol covering liquid, obtain coating product, wherein element magnesium and LiMn
2O
4The mol ratio of central element manganese be 0.003 ~ 0.03; To coat product and carry out sintering, technological parameter is following: 600 ℃ of a sections are incubated 8 hours; 950 ℃ of insulations of b section 3 hours; The cooling of c section obtains the LiMn that magnesium coats
2O
4LiMn with the cooled magnesium coating of sintering
2O
4Broken.
Embodiment three:
With MnO
2And Li
2CO
3For raw material by weight preparing burden for 1:2; Ball mill mixing, oven dry is sieved; 850 ℃ of calcinings, insulation obtains LiMn
2O
4Powder; With the magnesium salts colloidal sol that magnesium isopropoxide and cosolvent toluene mix and forms, the weight concentration of magnesium salts is 20% in the colloidal sol, obtains magnesium salts colloidal sol covering liquid; With LiMn
2O
4Powder joins and coats in the phase ethyl ketone; With LiMn
2O
4The part by weight of ethyl ketone is controlled at 1:3 to powder with coating mutually; After mixing 7 minutes, add above-mentioned magnesium salts colloidal sol covering liquid, obtain coating product, wherein element magnesium and LiMn
2O
4The mol ratio of central element manganese be 0.02; To coat product and carry out sintering, technological parameter is following: 400 ℃ of a sections are incubated 10 hours; 800 ℃ of insulations of b section 5 hours; The cooling of c section obtains the LiMn that magnesium coats
2O
4LiMn with the cooled magnesium coating of sintering
2O
4Broken.
More than specific embodiment of the present invention is described in detail, but it is just as example, the present invention is not restricted to the specific embodiment of above description.To those skilled in the art, any equivalent modifications that the present invention is carried out with substitute also all among category of the present invention.Therefore, not breaking away from impartial conversion and the modification of being done under the spirit and scope of the present invention, all should contain within the scope of the invention.
Claims (4)
1. lithium ion battery clad anode material preparation method is characterized in that step comprises:
Step 1, preparation positive electrode: with MnO
2And Li
2CO
3For raw material by weight being to prepare burden in 1 ~ 1.5:3 ~ 4.5; Ball mill mixing, oven dry is sieved; 750 ℃ ~ 800 ℃ calcinings, insulation obtains LiMn
2O
4Powder;
Step 2, the preparation covering liquid: with the mix magnesium salts colloidal sol of formation of magnesium isopropoxide and cosolvent toluene, the weight concentration of magnesium salts is 10% ~ 20% in the colloidal sol, obtains magnesium salts colloidal sol covering liquid;
Step 3 coats: with LiMn
2O
4Powder joins and coats in the phase ethyl ketone; With LiMn
2O
4The part by weight of ethyl ketone is controlled at 1:3 to powder with coating mutually; After mixing 6-8 minute, add above-mentioned magnesium salts colloidal sol covering liquid, obtain coating product, wherein element magnesium and LiMn
2O
4The mol ratio of central element manganese be 0.003 ~ 0.03;
Step 4, sintering: will coat product and carry out sintering, technological parameter is following: 400 ~ 600 ℃ of a sections are incubated 8 ~ 10 hours; 800 ~ 950 ℃ of insulations of b section 3 ~ 5 hours; The cooling of c section obtains the LiMn that magnesium coats
2O
4
Step 5, fragmentation: with the LiMn of the cooled magnesium coating of sintering
2O
4Broken.
2. preparation method as claimed in claim 1 is characterized in that, wherein, in step 1, MnO
2And Li
2CO
3Weight ratio is 1:3.
3. preparation method as claimed in claim 1 is characterized in that, wherein, in step 2, the weight concentration of magnesium salts is 15% in the colloidal sol.
4. preparation method as claimed in claim 1 is characterized in that, wherein, sintering process parameter is following in step 4: 500 ℃ of a sections are incubated 9 hours; 900 ℃ of insulations of b section 4 hours; The c section. cooling obtains the LiMn that magnesium coats
2O
4
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210136132.8A CN102637849B (en) | 2012-05-04 | 2012-05-04 | Preparation method of coating cathode material of lithium ion battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210136132.8A CN102637849B (en) | 2012-05-04 | 2012-05-04 | Preparation method of coating cathode material of lithium ion battery |
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|---|---|
| CN102637849A true CN102637849A (en) | 2012-08-15 |
| CN102637849B CN102637849B (en) | 2014-11-26 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102891288A (en) * | 2012-09-24 | 2013-01-23 | 上海锦众信息科技有限公司 | Method for preparing surface-coated anode material of lithium battery |
| CN105355859A (en) * | 2015-12-21 | 2016-02-24 | 宁波高新区锦众信息科技有限公司 | Preparation method of magnesium and barium doped lithium iron phosphate cathode material for lithium ion battery |
| CN112216815A (en) * | 2019-07-11 | 2021-01-12 | 深圳市比亚迪锂电池有限公司 | Lithium manganese battery positive electrode and lithium manganese battery |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1627550A (en) * | 2003-12-11 | 2005-06-15 | 比亚迪股份有限公司 | Anode material of lithium ion cell and preparation method |
| CN1787254A (en) * | 2004-12-09 | 2006-06-14 | 比亚迪股份有限公司 | Lithium ion cell positive electrode actived material and preparation method thereof |
| CN102195035A (en) * | 2010-03-19 | 2011-09-21 | 江西省福斯特新能源有限公司 | Positive material for lithium ion battery and lithium ion battery with same |
-
2012
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1627550A (en) * | 2003-12-11 | 2005-06-15 | 比亚迪股份有限公司 | Anode material of lithium ion cell and preparation method |
| CN1787254A (en) * | 2004-12-09 | 2006-06-14 | 比亚迪股份有限公司 | Lithium ion cell positive electrode actived material and preparation method thereof |
| CN102195035A (en) * | 2010-03-19 | 2011-09-21 | 江西省福斯特新能源有限公司 | Positive material for lithium ion battery and lithium ion battery with same |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102891288A (en) * | 2012-09-24 | 2013-01-23 | 上海锦众信息科技有限公司 | Method for preparing surface-coated anode material of lithium battery |
| CN102891288B (en) * | 2012-09-24 | 2016-08-31 | 上海锦众信息科技有限公司 | A kind of preparation method of lithium battery surface clad anode material |
| CN105355859A (en) * | 2015-12-21 | 2016-02-24 | 宁波高新区锦众信息科技有限公司 | Preparation method of magnesium and barium doped lithium iron phosphate cathode material for lithium ion battery |
| CN112216815A (en) * | 2019-07-11 | 2021-01-12 | 深圳市比亚迪锂电池有限公司 | Lithium manganese battery positive electrode and lithium manganese battery |
| CN112216815B (en) * | 2019-07-11 | 2021-12-07 | 深圳市比亚迪锂电池有限公司 | Lithium manganese battery positive electrode and lithium manganese battery |
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| Publication number | Publication date |
|---|---|
| CN102637849B (en) | 2014-11-26 |
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Granted publication date: 20141126 Termination date: 20180504 |