CN1227757C - Process for making electrode binding sizing agent of lithium ion secondary cell - Google Patents
Process for making electrode binding sizing agent of lithium ion secondary cell Download PDFInfo
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- CN1227757C CN1227757C CNB021509255A CN02150925A CN1227757C CN 1227757 C CN1227757 C CN 1227757C CN B021509255 A CNB021509255 A CN B021509255A CN 02150925 A CN02150925 A CN 02150925A CN 1227757 C CN1227757 C CN 1227757C
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- water
- soluble polymer
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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 present invention relates to a method for manufacturing adhesive slurry for an electrode of a lithium ion secondary battery. The ingredients of the adhesive slurry used for a positive pole comprise a water-soluble polymer, electroactive substances, graphitized carbon black and water used as a solvent, wherein the water-soluble polymer is composed of an organosilicon glue crosslinking additive and modification polyethylene glycol oxide; the electroactive substances are transition metal oxides containing lithium; the ingredients of the adhesive slurry for a negative pole comprise a water-soluble polymer, graphite and water used as a solvent; the adhesive slurry is refined by steps of step-by-step mix, control time stir, sieving, etc. according to specified proportions of ingredients in a manufacture course. Because the water is used for the solvent to manufacture the adhesive slurry used for the electrode, battery polarization can be decreased, the energy loss of a battery during charge and discharge is reduced, the capacity and the specific energy of the battery are improved, and cyclic use times are improved. The present invention is favorable to ameliorate a productive environment so as to protect the environment.
Description
Invention field
The present invention relates to the manufacturing technology field of secondary cell, specifically, relate to be used for when lithium rechargeable battery is produced the manufacture method that electrode plates contains the bonding slurry of electroactive material.
Background technology
The present lithium ion battery of producing, usually all be to contain oxide filler or to contain carbon or the electroactive material of graphite packing and other components, in the presence of polymer, it is scattered in the solvent, form a kind of slurry, after being applied on the electrode plates, solvent evaporated disperses thing to be deposited on the pole piece again, obtains negative or positive electrode according to employed filler.
Since lithium rechargeable battery is born, the bonding slurry of both positive and negative polarity is made and is all adopted organic solvent system, as the bonding slurry of both positive and negative polarity that adopts N-methyl pyrrolidone-polyvinylidene fluoride (NMP-PVDF), conductive carbon black and active material to be mixed and made into promptly is one of them, this class slurry has a large amount of organic solvent emission in air in coating process, reclaim quite difficulty, bring very big influence for direct labor and surrounding enviroment.
Summary of the invention
The objective of the invention is for overcoming the defective of prior art, a kind of pernicious gas volatile matter that do not produce is provided, adopting with water is that the electrode of lithium rechargeable battery of solvent is with the manufacture method of bonding slurry.
For achieving the above object, the technical solution used in the present invention is such: as the bonding slurry of positive pole usefulness, comprise water-soluble polymer, electroactive material, conductive carbon black in the composition and as the water of solvent; Said water-soluble polymer is the reactant that a kind of organic silica gel crosslinking additives and modification polyethylene glycol oxide mix, and electroactive material is a kind of lithium-containing transition metal oxide; As the bonding slurry that negative pole is used, comprise water-soluble polymer, graphite in the composition and as the water of solvent; Said water-soluble polymer is also the same with positive pole, is the reactant that a kind of organic silica gel crosslinking additives and modification polyethylene glycol oxide mix; Stipulate proportioning according to each component in manufacturing process, the employing substep mixes, step such as stirring and screening is made with extra care and formed when controlling.
Owing to adopted technique scheme, the present invention compares with the lithium battery with organic solvent system slurry making electrode of existing technology, has the following advantages:
1, reduced battery polarization to greatest extent, reduced the energy loss of battery in discharging and recharging, the problem that battery is produced because of heat radiation has bigger controlling, and provides the foundation for making high-power lithium ion battery; Because of polarization reduces, battery electrode significantly reduces because of the shedding of thermal expansion factor descends cycle performance, brings up to 1000 times than 500 circulations of lithium battery nominal that the organic solvent system slurry is made simultaneously;
2, the active material ratio of both positive and negative polarity all than increasing that the organic system slurry is made, after tested, has improved 3% battery capacity;
3, the battery discharge platform of under same cobalt-lithium oxide granularity, making, promptly electrode potential increases, and has improved the specific energy of battery;
4, the moisture absorption of pole piece strengthens, and helps the soft aluminium packing of liquid battery.
5, improve production efficiency, helped direct labor's health, made lithium battery by using environment-friendly and then moved towards the production environmental protection, saved the production control cost;
6, help environmental protection.
Embodiment
The present invention is further elaborated with specific embodiment below.
The electrode of a kind of lithium rechargeable battery of the present invention with the manufacture method of bonding slurry, its technical process is:
For the bonding slurry of positive pole:
1, be 30 parts with water and water-soluble polymer with weight ratio: 37 parts mixed, stirred 2 hours in mixer;
Wherein water-soluble polymer is to be formed by organic silica gel crosslinking additives and the mixed reaction of modification polyethylene glycol oxide, and the weight ratio that both add is 1: 30;
Said organic silica gel crosslinking additives is: aminoethyl-aminopropyl-methyl-dimethoxy silane, molecular weight are 206;
Said modification polyethylene glycol oxide is to be that 80 ℃, PH are about 8 to add a kind of compound that contains hydroxyl and carry out modified-reaction and form by polyethylene glycol oxide in temperature, and its molecular weight is between 30-40 ten thousand;
2,4 parts of carbon blacks are added in the said mixture, continue to stir 2 hours;
3, this pasty slurry is ground on grinder;
4,100 parts of cobalt acid lithiums are added wherein, stirred again 4 hours;
5, leave standstill 5-8 hour, sieve with 80 mesh sieves;
The bonding slurry that said method is made is coated with on anodal base material, and coating temperature is 80-90 ℃; Chain of command density is at 0.222mg/mm
2About; Dry with the dry air of 60-70 ℃ big flow then.
For the bonding slurry of negative pole:
1, be 70 parts with water and water-soluble polymer with weight ratio: 110 parts mixed, stirred 2 hours in mixer;
Wherein water-soluble polymer is to be formed by organic silica gel crosslinking additives and the mixed reaction of modification polyethylene glycol oxide, and the weight ratio that both add is 1: 30;
Said organic silica gel crosslinking additives is: aminoethyl-aminopropyl-methyl-dimethoxy silane, molecular weight are 206;
Said modification polyethylene glycol oxide is to be that 80 ℃, PH are about 8 to add a kind of compound that contains hydroxyl and carry out modified-reaction and form by polyethylene glycol oxide in temperature, and its molecular weight is between 30-40 ten thousand;
2,100 parts of graphite are added in the said mixture, continue to stir 5 hours;
3, this pasty slurry is ground on grinder;
4, leave standstill use after 2 hours.
The bonding slurry that said method is made is coated with on base material of cathode, and coating temperature is 80-90 ℃; Chain of command density is at 0.095mg/mm
2About, dry with the dry air of 60-70 ℃ big flow.
Each constituent content that above-mentioned technical process is related and the temperature of control all can be carried out change among a small circle on listed numerical value.
Claims (4)
1, a kind of electrode of lithium rechargeable battery is characterized in that with the manufacture method of bonding slurry: as the bonding slurry of positive pole, comprise water-soluble polymer, electroactive material cobalt acid lithium, conductive carbon black in the composition and as the water of solvent; Its technical process is as follows:
1. be 30 parts with water and water-soluble polymer with weight ratio: 37 parts mixed, stirred 2 hours in mixer;
2. 4 parts of carbon blacks are added in the said mixture, continue to stir 2 hours;
3. this pasty slurry is ground on grinder;
4. 100 parts of cobalt acid lithiums are added wherein, stirred again 4 hours;
5. left standstill 5-8 hour, and sieved, be the bonding slurry of spendable positive pole with 80 mesh sieves;
As the bonding slurry of negative pole, comprise water-soluble polymer, graphite in the composition and as the water of solvent; Its technical process is as follows:
1. be 70 parts with water and water-soluble polymer with weight ratio: 110 parts mixed, stirred 2 hours in mixer;
2. 100 parts of graphite are added in the said mixture, continue to stir 5 hours;
3. this pasty slurry is ground on grinder;
4. left standstill 2 hours, and be the bonding slurry of spendable negative pole.
2, the electrode of a kind of lithium rechargeable battery according to claim 1 is characterized in that with the manufacture method of bonding slurry: the preparation of said water-soluble polymer is that organic silica gel crosslinking additives and modification polyethylene glycol oxide are formed with the mixed reaction of 1: 30 weight ratio.
3, the electrode of a kind of lithium rechargeable battery according to claim 2 is with the manufacture method of bonding slurry, and it is characterized in that: said organic silica gel crosslinking additives is: aminoethyl-aminopropyl-methyl-dimethoxy silane, molecular weight are 206.
4, the electrode of a kind of lithium rechargeable battery according to claim 2 is with the manufacture method of bonding slurry, it is characterized in that: said modification polyethylene glycol oxide is to be that 80 ℃, PH are to add a kind of compound that contains hydroxyl under 8 conditions to carry out modified-reaction and form by polyethylene glycol oxide in temperature, and its molecular weight is between 30-40 ten thousand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021509255A CN1227757C (en) | 2002-11-28 | 2002-11-28 | Process for making electrode binding sizing agent of lithium ion secondary cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021509255A CN1227757C (en) | 2002-11-28 | 2002-11-28 | Process for making electrode binding sizing agent of lithium ion secondary cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1505185A CN1505185A (en) | 2004-06-16 |
| CN1227757C true CN1227757C (en) | 2005-11-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021509255A Expired - Fee Related CN1227757C (en) | 2002-11-28 | 2002-11-28 | Process for making electrode binding sizing agent of lithium ion secondary cell |
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| CN (1) | CN1227757C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100764619B1 (en) * | 2005-04-04 | 2007-10-08 | 주식회사 엘지화학 | Lithium Secondary Battery Containing Silicon-based or Tin-based Anode Active Material |
| WO2006109948A1 (en) * | 2005-04-12 | 2006-10-19 | Lg Chem, Ltd. | Lithium secondary battery containing silicon-based or tin-based anode active material |
| CN101207193B (en) * | 2006-12-21 | 2010-11-17 | 比亚迪股份有限公司 | Method for preparation of electrode slurry |
| CN102145329B (en) * | 2011-03-14 | 2012-12-19 | 中航锂电（洛阳）有限公司 | Slurry mixing process of lithium ion battery electrode slurry |
| JP5006462B1 (en) * | 2011-09-09 | 2012-08-22 | ファイラックインターナショナル株式会社 | Manufacturing method of solid-state secondary battery and solid-state secondary battery based on the manufacturing method |
| CN104064730B (en) * | 2014-07-02 | 2016-08-24 | 长沙国容新能源有限公司 | A kind of lithium titanate anode sheet and preparation method thereof, lithium-ion capacitor, battery |
| US10361423B2 (en) * | 2016-01-18 | 2019-07-23 | Grst International Limited | Method of preparing battery electrodes |
| CN107845812A (en) * | 2016-09-18 | 2018-03-27 | 宁德新能源科技有限公司 | Anode pole piece and preparation method thereof and secondary cell |
| CN108232129A (en) * | 2016-12-21 | 2018-06-29 | 深圳市比克动力电池有限公司 | Lithium ion battery negative material, negative plate and lithium ion battery |
-
2002
- 2002-11-28 CN CNB021509255A patent/CN1227757C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1505185A (en) | 2004-06-16 |
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