CN102339989A - Preparation method of negative pole piece and application of prepared negative pole piece - Google Patents
Preparation method of negative pole piece and application of prepared negative pole piece Download PDFInfo
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- CN102339989A CN102339989A CN201110276080XA CN201110276080A CN102339989A CN 102339989 A CN102339989 A CN 102339989A CN 201110276080X A CN201110276080X A CN 201110276080XA CN 201110276080 A CN201110276080 A CN 201110276080A CN 102339989 A CN102339989 A CN 102339989A
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- negative plate
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- graphite powder
- negative pole
- pole piece
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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
Abstract
The invention is applicable to the field of batteries, and provides a preparation method of a negative pole piece and application of a prepared negative pope piece in the batteries. The preparation method of the negative pole piece comprises the following steps: pretreatment, the preparation of slurry of the negative pole piece, the preparation of the negative pole piece, and the like. According to the preparation method of the negative pole piece, through carrying out the pretreatment on artificial graphite powder by using alcohol, the hydroxyl of the alcohol is attached on the surface of artificial graphite; the hydrophilicity of the surface of the artificial graphite is greatly promoted; the purposes that the artificial graphite has better dispersity and is not deposited in a slurry mixing process are achieved; and the purpose that the batteries with the negative pole piece prepared by utilizing the method have better circulation performance is achieved.
Description
Technical field
The invention belongs to the battery technology field, relate in particular to a kind of negative plate preparation method and the prepared application of negative plate in battery.
Background technology
Graphous graphite powder has wide material sources, with low cost, characteristics that capacity is high, in the cell preparation field, has important use to be worth.But graphous graphite powder in the preparation process because processing such as heating; Cause inhomogeneous and other defectives in Delanium surface; Cause using Delanium in the preparation battery cathode sheet; Deposition appears in Delanium easily in closing the slurry process, bad dispersibility finally causes the prepared cell cycle performance poor.
Summary of the invention
In view of this, the present invention provides a kind of negative plate preparation method, solves the technical problem of Delanium appearance deposition easily in closing the slurry process in the prior art.
The present invention is achieved in that
A kind of negative plate preparation method comprises the steps:
Graphous graphite powder is added in the alcoholic solution, stirs and obtain first solution;
This first solution, conductive agent, binding agent and water are mixed, obtain the negative plate slurry;
With obtaining negative plate after this negative plate slurry coating, the drying.
The present invention further provides above-mentioned negative plate preparation method the prepared application of negative plate in battery.
Negative plate preparation method of the present invention; Through using alcoholic solution that graphous graphite powder is carried out preliminary treatment; Make pure hydroxyl at the graphous graphite powder surface enrichment; The graphous graphite powder hydrophily significantly promotes, and has realized graphous graphite powder good dispersiveness in closing the slurry process, greatly reduces the graphous graphite powder deposited phenomenon; Negative plate preparation method of the present invention, simple to operate, with low cost, be very suitable for suitability for industrialized production.
Description of drawings
Fig. 1 is an embodiment of the invention negative plate preparation method flow chart.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
See also Fig. 1, Fig. 1 shows embodiment of the invention negative plate preparation method flow chart, comprises the steps:
Step S01, preliminary treatment
Graphous graphite powder is added in the alcoholic solution, stirs and obtain first solution;
Step S02, preparation negative plate slurry
This first solution, conductive agent, binding agent and water are mixed, obtain the negative plate slurry;
Step S03, the preparation negative plate
With obtaining negative plate after this negative plate slurry coating, the drying.
Among the step S01, particularly, prepare in the process at Delanium, because it is processing such as cutting, heating make the Delanium surface have bigger defective, relatively poor with the compatibility of water.Negative plate preparation method of the present invention; Through graphous graphite powder being carried out preliminary treatment with alcohol; The hydroxyl that makes alcohol makes the hydrophily on Delanium surface promote greatly in the Delanium surface attachment, and it is dispersed preferably to realize that finally Delanium has in closing the slurry process; Do not precipitate, realize utilizing the battery of the prepared negative plate of this method to have better cycle performance.
Particularly, the particle diameter of this graphous graphite powder is the 15-21 micron; Through using the graphous graphite powder of this particle diameter; Make that the hydroxyl quantity of Delanium surface enrichment very little, and is little to the hydrophily effect of graphous graphite powder in the hydroxyl reasonable quantity of the alcohol of graphite powder surface enrichment; If hydroxyl quantity is too many, also can reduce the hydrophily of graphous graphite powder on the contrary.
Particularly, in this alcoholic solution, solvent is a water, and solute is an alcohol.This alcohol is C for carbon number
1-C
6Alcohol, concrete not restriction, for example, methyl alcohol, ethanol, propyl alcohol, n-butanol etc. are preferably ethanol; The carbon number of ethanol is 2, and this hydroxyl/amount of carbon atom ratio is 1/2, and ethanol is had positive role in the graphous graphite powder surface attachment, belongs to low solvent slop.
Particularly, the mass ratio of this pure and mild graphous graphite powder is 0.5-5: 100, be preferably 0.55-1: and 100, promptly the quality of alcohol is the 0.5-5% of graphous graphite powder quality, is preferably 0.55-1%.The mass percent of this alcoholic solution is 5-10%, is preferably 5%.Through selecting the alcohol of above-mentioned mass ratio for use; Make that the hydroxyl quantity of Delanium surface enrichment very little, and is little to the hydrophily effect of graphous graphite powder attached to the hydroxyl reasonable quantity on graphous graphite powder surface; If hydroxyl quantity is too many, also can reduce the hydrophily of graphous graphite powder on the contrary.
After graphous graphite powder is added to alcoholic solution, stirred 1.5-2 hour, graphous graphite powder and pure mixing are mixed, stir some aggregates that make simultaneously in the graphous graphite powder and disperse.
Particularly; Among the step S02, this conductive agent is restriction not, for example acetylene black, Ketjen black etc.; This binding agent is restriction not; For example sodium carboxymethylcellulose, butadiene styrene emulsion, among the negative plate preparation method of the present invention, the weight ratio of graphous graphite powder, alcohol, conductive agent, binding agent and water is following: 44: 0.22: 0.88: 1.8: 53.1;
Wherein, the weight percentage of water is the water total weight percentage composition sum of using among the water that uses in the alcoholic solution and the step S02, in this alcoholic solution among water weight and the step S02 ratio of the weight of employed water be 8%: 92%.
With above-mentioned each component mix with, stir, obtain the negative plate slurry.
Particularly, among the step S03, the negative plate slurry is coated with on substrate, this substrate is restriction not, and for example aluminium foil etc. carries out drying with the substrate after the coating, and is last, carry out roller process after, obtain negative plate.
Negative plate preparation method of the present invention; Through graphous graphite powder being carried out preliminary treatment with alcohol; The hydroxyl that makes alcohol makes the hydrophily on Delanium surface promote greatly in the Delanium surface attachment, and it is dispersed preferably to realize that finally Delanium has in closing the slurry process; Do not precipitate, realize utilizing the battery of the prepared negative plate of this method to have better cycle performance.
The embodiment of the invention further provides above-mentioned negative plate preparation method the prepared application of negative plate in battery.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a negative plate preparation method comprises the steps:
Graphous graphite powder is added in the alcoholic solution, stirs and obtain first solution;
Said first solution, conductive agent, binding agent and water are mixed, obtain the negative plate slurry;
With obtaining negative plate after said negative plate slurry coating, the drying.
2. negative plate preparation method as claimed in claim 1 is characterized in that, the particle diameter of said graphous graphite powder is the 15-21 micron.
3. negative plate preparation method as claimed in claim 1 is characterized in that, said alcohol is C for carbon number
1-C
6Alcohol.
4. negative plate preparation method as claimed in claim 3 is characterized in that, said alcohol is ethanol.
5. negative plate preparation method as claimed in claim 1 is characterized in that, the mass ratio of said pure and mild said graphous graphite powder is 0.5-5: 100.
6. negative plate preparation method as claimed in claim 5 is characterized in that, the mass ratio of said pure and mild said graphous graphite powder is 0.55-1: 100.
7. negative plate preparation method as claimed in claim 1 is characterized in that, the concentration of said alcoholic solution is 5%.
8. negative plate preparation method as claimed in claim 1 is characterized in that, said graphous graphite powder is added in the alcoholic solution, and mixing time is 1.5-2 hour.
9. negative plate preparation method as claimed in claim 1 is characterized in that, the weight ratio of said graphous graphite powder, alcohol, conductive agent, binding agent and water is 44: 0.22: 0.88: 1.8: 53.1.
10. like the prepared application of negative plate in battery of each described negative plate preparation method of claim 1-9.
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| CN201110276080XA CN102339989A (en) | 2011-09-16 | 2011-09-16 | Preparation method of negative pole piece and application of prepared negative pole piece |
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| CN201110276080XA CN102339989A (en) | 2011-09-16 | 2011-09-16 | Preparation method of negative pole piece and application of prepared negative pole piece |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332630A (en) * | 2014-10-22 | 2015-02-04 | 深圳市贝特瑞新能源材料股份有限公司 | Surface coated graphite cathode material, preparation method of surface coated graphite cathode material, as well as lithium ion battery containing surface coated graphite cathode material |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101232106A (en) * | 2007-02-06 | 2008-07-30 | 松下电器产业株式会社 | Method for evaluating battery safety under internal short-circuit condition, battery, battery pack, method for producing battery, and method for producing battery pack |
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2011
- 2011-09-16 CN CN201110276080XA patent/CN102339989A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101232106A (en) * | 2007-02-06 | 2008-07-30 | 松下电器产业株式会社 | Method for evaluating battery safety under internal short-circuit condition, battery, battery pack, method for producing battery, and method for producing battery pack |
Non-Patent Citations (2)
| Title |
|---|
| 任俊，卢寿慈: "超细粉体在液相中的分散", 《中国粉体工业》 * |
| 陈云等: "微细鳞片石墨分散性", 《中南大学学报(自然科学版)》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332630A (en) * | 2014-10-22 | 2015-02-04 | 深圳市贝特瑞新能源材料股份有限公司 | Surface coated graphite cathode material, preparation method of surface coated graphite cathode material, as well as lithium ion battery containing surface coated graphite cathode material |
| CN104332630B (en) * | 2014-10-22 | 2018-03-30 | 深圳市贝特瑞新能源材料股份有限公司 | A kind of surface coated graphite cathode material and preparation method thereof and include its lithium ion battery |
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Application publication date: 20120201 |