CN103165865A - Aqueous formulation and preparation method of lithium ion battery electrode - Google Patents
Aqueous formulation and preparation method of lithium ion battery electrode Download PDFInfo
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- CN103165865A CN103165865A CN2011104196987A CN201110419698A CN103165865A CN 103165865 A CN103165865 A CN 103165865A CN 2011104196987 A CN2011104196987 A CN 2011104196987A CN 201110419698 A CN201110419698 A CN 201110419698A CN 103165865 A CN103165865 A CN 103165865A
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- lithium ion
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- deionized water
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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 title of the invention is an aqueous formulation and a preparation method of lithium ion battery electrodes. The invention relates to an aqueous formulation and a preparation method of positive and negative pole pieces of a lithium ion battery and a preparation method thereof. The invention mainly solves the problems in existing positive and negative pole pieces of lithium ion battery, such as oil adhesive or water-based adhesive with solid content of only 15% in the ingredients, expensive oily adhesive, pollution to the environment, impact on the health of operating personnel, weak stability of water-based adhesive with low solid content, inconvenient operation and affect on battery performance. The formula provided by the invention comprises 0.8-1.8 parts of a thickening agent, 90-96 parts of active substances, 60-100 parts of deionized water, 1-5 parts of a conductive agent, and 2-5 parts of a binder. The invention has advantages of good dispersibility of the slurry, smooth coating, strong adhesion, good extension performance of tabletting, pollution-free production process, and low price of raw materials.
Description
Technical field
The present invention relates to a kind of water-based proportioning and preparation method of lithium ion battery positive and negative electrode pole piece.
Background technology
Contain methyl pyrrolidone (being called for short NMP) and the PVDF adhesive of oiliness in known lithium ion battery positive and negative electrode pole piece batching, perhaps solid content only has 15% aqueous binder.These two kinds of distributions all have its weak point: the 1. methyl pyrrolidone of oiliness, and Fire Prevention Law divides it into the 4th class the second petroleum-type aqueous solvent, and Air Pollution Prevention Law is located VOC (VOC) and is controlled.NMP is not only expensive and environment is had certain pollution, and retracting device is complicated, and cost is high, and operator ' s health is had a direct impact; 2. existing aqueous binder is because solid content is low, and the instructions for use condition is harsh, and poor stability is not easy operation, and it increases the raising with freight of occupying of container, can not be now with the current, and the itself cost is higher.Therefore prior art is: production cost is high, production technology is difficult, pollution is large, battery performance is poor.
Summary of the invention
The object of the present invention is to provide that a kind of material is easy to get, low price, non-environmental-pollution, immediately field fabrication, simple to operate, be applicable to various lithium ion battery distributings, thereby improve the slurry dispersive property, make coating smooth, strong adhesion, the compressing tablet good extending performance, the internal resistance of cell is little, both positive and negative polarity pole piece batching of good cycle and preparation method thereof.
Technical solution of the present invention is: the formula of lithium ion cell electrode is as follows:
Thickener: 0.8 ~ 1.8 part;
Active material: 90 ~ 96 parts;
Deionized water: 60 ~ 100 parts;
Conductive agent: 1 ~ 5 part;
Binding agent: 2 ~ 5 parts.
Thickener described in technical solution of the present invention is by deionized water 40 ~ 60% and 0.5 ~ 2% preparation of edible CMC, its preparation method is: will eat carboxymethyl cellulose and evenly add stirring in the bucket that ionized water is housed, 10 hertz of low speed rotations, disperse 10 hertz 10 minutes, vacuum degree≤-vacuum of 0.08Mpa in middling speed stir.
Active material described in technical solution of the present invention is anodal phosphoric acid ferrovanadium reason, LiFePO4, LiMn2O4, ternary material, negative pole graphite, Graphene or lithium titanate; Described conductive agent is super conductive black or graphite; Described binding agent is this rubber of fourth or Kynoar.
The preparation process of the lithium ion cell electrode described in technical solution of the present invention is as follows:
1. get the 40-60% deionized water and add 0.5-2% edible instant CMC glue, join the thickener that stirs 0.5～2 hour system in the mixing and blending machine bucket standby;
2. step feeding soaks active material: will take first 50% of active matter total amount and drop in container, add 25% of deionized water total amount, after absorbing, moisture content carries out again secondary batching, all drop into remaining active material 50% in container, add again 25% of deionized water total amount, fully soaked 2～4 hours;
3. the glue that will make joins soaked active material, stirs 1～2 hour;
4. add the self-control thickener to mix, stirred 0.5～1 hour;
5. viscosimetric, viscosity is controlled need reach technological requirement;
With slurry with 100～120 purpose screen filtrations;
7. slurry is evenly coated on metal forming, dries by coating machine oven, then by to after roller compaction, be die-cut into the pole piece of various models.
Characteristics of the present invention are: viscosity, slurry solid content, all fine control of energy during discharging.Use formula of the present invention not produce bubble, do not produce precipitation, slurry fluidity is good.
Embodiment
Embodiment 1:
Proportioning is as follows:
92 parts of active materials;
76 parts of deionized waters;
1 part of thickener;
3 parts of conductive agents;
Binding agent
4 parts.
1, at first prepare thickener, by deionized water 40 ~ 60% and 0.5 ~ 2% preparation of edible CMC, its preparation method is: will eat carboxymethyl cellulose and evenly add stirring in the bucket that ionized water is housed, 10 hertz of low speed rotations, disperse 10 hertz 10 minutes, vacuum degree≤-vacuum of 0.08Mpa in middling speed stir that to make thickener in 1.5～2 hours standby.
2, will take 50% of active matter total amount drops in container, add 25% of deionized water total amount, carry out again secondary batching after moisture content absorbs, all drop into remaining active material 50% in container, add again 25% of deionized water total amount, fully soaked 2～4 hours.
3, with 3 parts of conductive agents, add in the thickener that has made, stirred 1.5～2 hours.
4, add 92 parts of soaked active materials, stirred 2～4 hours.
5, add 4 parts of binding agents, stirred 0.5～1 hour.
6, viscosimetric, viscosity is controlled need reach technological requirement.
7, with slurry with 100～120 purpose screen filtrations.
8, slurry is evenly coated on metal forming, dries by coating machine oven, then by to roller compaction backlash be cut into the pole piece of various models.
Embodiment 2
Proportioning is as follows:
94 parts of active materials;
80 parts of deionized waters;
1 part of thickener;
1.5 parts of conductive agents;
Binding agent
2.5 part.
The present embodiment preparation method is identical with embodiment 1, and difference is that embodiment 2 is not only applicable to anodal batching, equally also is applicable to cathode blending.
Embodiment 3
Proportioning is as follows:
93 parts of active materials;
70 parts of deionized waters;
1 part of thickener;
3 parts of conductive agents;
Binding agent
3 parts.
The present embodiment preparation method is identical with embodiment 1, and difference is to have reduced in embodiment 3 proportioning of deionized water and thickener.
Take formula of the present invention
1, viscosity during discharging of the present invention, slurry solid content, all can fine control.
2, formula of the present invention be coated with in coating process smooth good without bubble, no marking, slurry fluidity.
3, to make the internal resistance of cell little in the present invention, and take embodiment 3 as example, internal resistance can be controlled in 0.2 m Ω (put internal resistance instrument HIOKI 3554 day and measure to use).
4, the present invention makes that the battery capacity lapse rate descends slowly, good cycle, and battery life is long.Take embodiment 3 as example, capacity can be controlled in 20% in 2000 later capacity lapse rates of circulation.
Claims (4)
1. the water prescription of a lithium ion cell electrode and preparation method, it is characterized in that: the formula of lithium ion battery is as follows:
Thickener: 0.8 ~ 1.8 part;
Active material: 90 ~ 96 parts;
Deionized water: 60 ~ 100 parts;
Conductive agent: 1 ~ 5 part;
Binding agent: 2 ~ 5 parts.
2. the water prescription of a kind of lithium ion cell electrode according to claim 1 and preparation method, it is characterized in that: described thickener is by deionized water 40 ~ 60% and 0.5 ~ 2% preparation of edible CMC, its preparation method is: will eat carboxymethyl cellulose and evenly add stirring in the bucket that ionized water is housed, 10 hertz of low speed rotations, disperse 10 hertz 10 minutes, vacuum degree≤-vacuum of 0.08Mpa in middling speed stir.
3. the water prescription of a kind of lithium ion cell electrode according to claim 1 and preparation method, it is characterized in that: described active material is anodal phosphoric acid ferrovanadium reason, LiFePO4, LiMn2O4, ternary material, negative pole graphite, Graphene or lithium titanate; Described conductive agent is super conductive black or graphite; Described binding agent is this rubber of fourth or Kynoar.
4. the water prescription of a kind of lithium ion cell electrode according to claim 1 and 2 and preparation method, it is characterized in that: the preparation process of described lithium ion cell electrode is as follows:
1). get the 40-60% deionized water and add 0.5-2% edible instant CMC glue, join the thickener that stirs 0.5～2 hour system in the mixing and blending machine bucket standby;
2). step feeding soaks active material: will take first 50% of active matter total amount and drop in container, add 25% of deionized water total amount, after absorbing, moisture content carries out again secondary batching, all drop into remaining active material 50% in container, add again 25% of deionized water total amount, fully soaked 2～4 hours;
3). the glue that will make joins soaked active material, stirs 1～2 hour;
4). add thickener to mix, stirred 0.5～1 hour;
5). viscosimetric, viscosity is controlled need reach technological requirement;
6). with slurry with 100～120 purpose screen filtrations;
7). slurry is evenly coated on metal forming, dries by coating machine oven, then by to after roller compaction, be die-cut into the pole piece of various models.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104196987A CN103165865A (en) | 2011-12-15 | 2011-12-15 | Aqueous formulation and preparation method of lithium ion battery electrode |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011104196987A CN103165865A (en) | 2011-12-15 | 2011-12-15 | Aqueous formulation and preparation method of lithium ion battery electrode |
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| CN103165865A true CN103165865A (en) | 2013-06-19 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103515615A (en) * | 2013-10-14 | 2014-01-15 | 广东志成冠军集团有限公司 | Aqueous positive slurry of capacity type power lithium battery and preparation method of aqueous positive slurry |
| CN103647049A (en) * | 2013-12-04 | 2014-03-19 | 合肥国轩高科动力能源股份公司 | Method for preparing lithium iron phosphate membrane electrode |
| CN105449205A (en) * | 2015-12-17 | 2016-03-30 | 山东精工电子科技有限公司 | Preparation method for waterborne lithium iron phosphate slurry |
| CN109065887A (en) * | 2018-06-30 | 2018-12-21 | 合肥国轩高科动力能源有限公司 | A kind of conjunction paste-making method of lithium ion power cell cathode |
| CN109088058A (en) * | 2018-07-31 | 2018-12-25 | 河南新太行电源股份有限公司 | A kind of lithium ion battery silicon-carbon cathode material and preparation process |
| CN113540399A (en) * | 2021-06-23 | 2021-10-22 | 万向一二三股份公司 | Water system negative plate for high-power lithium ion battery and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1691376A (en) * | 2004-04-26 | 2005-11-02 | 深圳市比克电池有限公司 | Method for preparing active material pulp of cathode and electrode, battery using the same pulp |
| CN101286563A (en) * | 2008-04-30 | 2008-10-15 | 东莞市迈科新能源有限公司 | Aqueous glue, lithium battery applying the aqueous glue and manufacturing method for the lithium battery |
-
2011
- 2011-12-15 CN CN2011104196987A patent/CN103165865A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1691376A (en) * | 2004-04-26 | 2005-11-02 | 深圳市比克电池有限公司 | Method for preparing active material pulp of cathode and electrode, battery using the same pulp |
| CN101286563A (en) * | 2008-04-30 | 2008-10-15 | 东莞市迈科新能源有限公司 | Aqueous glue, lithium battery applying the aqueous glue and manufacturing method for the lithium battery |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103515615A (en) * | 2013-10-14 | 2014-01-15 | 广东志成冠军集团有限公司 | Aqueous positive slurry of capacity type power lithium battery and preparation method of aqueous positive slurry |
| CN103515615B (en) * | 2013-10-14 | 2016-09-07 | 广东志成冠军集团有限公司 | A kind of water system anode sizing agent of capacity type dynamic lithium battery and preparation method thereof |
| CN103647049A (en) * | 2013-12-04 | 2014-03-19 | 合肥国轩高科动力能源股份公司 | Method for preparing lithium iron phosphate membrane electrode |
| CN105449205A (en) * | 2015-12-17 | 2016-03-30 | 山东精工电子科技有限公司 | Preparation method for waterborne lithium iron phosphate slurry |
| CN109065887A (en) * | 2018-06-30 | 2018-12-21 | 合肥国轩高科动力能源有限公司 | A kind of conjunction paste-making method of lithium ion power cell cathode |
| CN109088058A (en) * | 2018-07-31 | 2018-12-25 | 河南新太行电源股份有限公司 | A kind of lithium ion battery silicon-carbon cathode material and preparation process |
| CN113540399A (en) * | 2021-06-23 | 2021-10-22 | 万向一二三股份公司 | Water system negative plate for high-power lithium ion battery and preparation method thereof |
| CN113540399B (en) * | 2021-06-23 | 2022-06-14 | 万向一二三股份公司 | Water system negative plate for high-power lithium ion battery and preparation method thereof |
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Application publication date: 20130619 |