CN105047938A - Preparation method for anode paste of lithium battery - Google Patents
Preparation method for anode paste of lithium battery Download PDFInfo
- Publication number
- CN105047938A CN105047938A CN201510415265.2A CN201510415265A CN105047938A CN 105047938 A CN105047938 A CN 105047938A CN 201510415265 A CN201510415265 A CN 201510415265A CN 105047938 A CN105047938 A CN 105047938A
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- mixture
- cathode
- lithium battery
- manufacture method
- deionized water
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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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
- H01M4/1393—Processes of manufacture of electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
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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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/621—Binders
- H01M4/622—Binders being polymers
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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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
-
- 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 & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention provides a preparation method for an anode paste of a lithium battery. The fabrication method comprises the following steps of: mixing and uniformly stirring an oily solvent, a conductive agent, deionized water, a thickening agent, an anode material and an adhesive in batches, and adjusting the solid content of the mixture to be 60-80 percent by using the deionized water, thereby preparing a product. The preparation method has the advantages of simplicity in process and clearness in principle, through adding ingredients by stages and adjusting a temperature, all ingredients are ensured to be fully mixed, the prepared paste is pasty and is high in stability, and the layered problem of the paste can be thoroughly prevented.
Description
Technical field
The present invention relates to technical field of lithium batteries, be specifically related to a kind of manufacture method of cathode of lithium battery slurry.
Background technology
Lithium rechargeable battery because monomer whose voltage is high, energy and power density is large, the long-life, quality gently little, memory-less effect, the advantage such as pollution-free, become current widely used power supply product.Its application mainly comprises all kinds of portable electronic consumer product (as smart mobile phone, panel computer, digital camera etc.); Solar energy/supporting energy storage in wind energy power station; Electric motor car (EV) and hybrid electric vehicle (HEV); Military weaponry; Space industry etc.Especially in recent years along with the application in electric motor car, people propose higher performance requirement to lithium ion battery.And the raising of performance of lithium ion battery is except being limited by the performance improvement of various battery material (as positive electrode, negative material, electrolyte, barrier film), also depend on the preparation of the anode and cathode slurry of the control, particularly initial stage of each link of battery production technology process to a great extent.
Lithium battery anode and cathode slurry is made up of components such as active material, conductive additive, binding agent, solvent, additives (as defoamer, thickener, dispersant) usually.The solvent used in traditional cathode size is water or oil-based solvent often, water paste is a kind of solid-liquid suspension mixture of instability, it is metastable condition, water and graphite are easy to layering, water is easy to volatilization in addition, occur that dry pulp phenomenon is inevitable, and the cost of oil slurry is higher, toxicity is also larger, does not utilize environmental protection.
Summary of the invention
The present invention is to address the deficiencies of the prior art and not enough, provides a kind of manufacture method of in stable condition, reliable in quality, cost are low, toxicity is little cathode of lithium battery slurry.
For realizing above object, technical solution of the present invention is:
A manufacture method for cathode of lithium battery slurry, is characterized in that operating procedure is as follows:
1) following raw material is prepared burden by mass percentage: oil-based solvent 10 ~ 30%, conductive agent 1 ~ 3%, deionized water 30 ~ 50%, thickener 1 ~ 3%, negative material 30 ~ 50%, binding agent 2 ~ 4%;
2) by oil-based solvent and conductive agent mixing, fully stir evenly with de-airing mixer, obtained mixture A;
3) deionized water is mixed with thickener, fully stir evenly with mixer, obtained mixture B;
4) mixture A and mixture B is fully mixed to get mixture C;
5) negative material and binding agent are added in mixture C, after stirring, obtain mixture D;
6) solid content adding deionized water adjustment mixture D is 60 ~ 80% obtained finished products, and the dispersion effect of Hegman fineness grind instrument judgement slurry with 0 ~ 50 micron.
Described oil-based solvent is one or more in isopropyl alcohol, 1-METHYLPYRROLIDONE, ethanol.
One or more in described conductive agent carbon black, Graphene, scale graphite, carbon nano-tube.
Described thickener is one or more in sodium carboxymethylcellulose, polyanion cellulose.
Described negative material is one or more in native graphite, Delanium, carbosphere, hard carbon, coke.
Described binding agent is one or more in butadiene-styrene rubber, polytetrafluoroethylene, polyacrylonitrile.
The content of described oil-based solvent is 5 ~ 30% of deionized water content.
Described step 2) in the mixing temperature of deionized water and thickener be 45 ~ 55 DEG C.
Compared with prior art, beneficial effect of the present invention is:
1, the present invention adopts the mixed system of semi-aqueous half oiliness, has both played the stability of oil slurry, and has also inherited the low cost of water paste, and in the pasty state, stability is high for the slurry produced, and thoroughly can avoid the lamination problem of slurry.
2, the cathode size adopting present invention process to produce, can improve the uniformity of coated face density, to ensureing that battery consistency is very helpful.
3, present invention process is simple, orderliness is clear, by stage by stage add batching and temperature regulate, guarantee that all batchings can fully mix, ensure that the quality of cathode size.
Accompanying drawing explanation
Fig. 1 is the cathode size particle schematic diagram that traditional handicraft is produced.
Fig. 2 is the cathode size particle schematic diagram that the present invention produces.
Fig. 3 is the optical photograph of the cathode size dispersion effect that traditional handicraft is produced.
Fig. 4 is the optical photograph of the cathode size dispersion effect that the present invention produces.
Fig. 5 is the optical photograph of the cathode pole piece that traditional handicraft makes.
Fig. 6 is the optical photograph of the cathode pole piece that the present invention makes.
Embodiment
Embodiment 1:
1) following raw material is prepared burden by mass percentage: isopropyl alcohol 15%, Graphene 1%, deionized water 50%, sodium carboxymethylcellulose 1%, carbosphere 30%, butadiene-styrene rubber 3%;
2) by isopropyl alcohol and Graphene mixing, fully stir evenly with de-airing mixer, obtained mixture A;
3) deionized water is mixed with sodium carboxymethylcellulose, fully stir evenly with mixer, obtained mixture B;
4) mixture A and mixture B is fully mixed to get mixture C;
5) carbosphere and butadiene-styrene rubber are added in mixture C, after stirring, obtain mixture D;
6) solid content adding deionized water adjustment mixture D is 60% obtained finished product, and judges the dispersion effect of slurry with the Hegman fineness grind instrument of 50 microns, and it is qualified for it is generally acknowledged that maximum particle size is less than 35 microns.
During use, by the mode of blade coating, cathode size is coated on metallic matrix equably, be less than dry under the environment of 110 DEG C after just can obtain required by negative plate.
Implementation column 2:
1) following raw material is prepared burden by mass percentage: 1-METHYLPYRROLIDONE 12.6%, scale graphite 1.4%, deionized water 45%, polyanion cellulose 1%, hard carbon 38%, polytetrafluoroethylene 2%;
2) by 1-METHYLPYRROLIDONE and scale graphite mixing, fully stir evenly with de-airing mixer, obtained mixture A;
3) deionized water is mixed with polyanion cellulose, fully stir evenly with mixer, obtained mixture B;
4) mixture A and mixture B is fully mixed to get mixture C;
5) hard carbon and polytetrafluoroethylene are added in mixture C, after stirring, obtain mixture D;
6) solid content adding deionized water adjustment mixture D is 60% obtained finished product, and judges the dispersion effect of slurry with the Hegman fineness grind instrument of 35 microns, and it is qualified for it is generally acknowledged that maximum particle size is less than 35 microns.
During use, by the mode of blade coating, cathode size is coated on metallic matrix equably, be less than dry under the environment of 110 DEG C after just can obtain required by negative plate.
Fig. 1, Fig. 3, Fig. 5 are the experimental datas of the cathode size using traditional handicraft to make, and Fig. 2, Fig. 4, Fig. 6 are the experimental datas of the cathode size using present invention process to produce.
As can be seen from Figure 1 the particle maximum of cathode size using traditional handicraft to produce is 22 microns, and in Fig. 2 the particle maximum of cathode size for being only 13 microns.
As can be seen from Figure 3 use the solid-liquid lamination of the cathode size of traditional handicraft production clearly, and in Fig. 4, cathode size slurry is stablized, not stratified.
As can be seen from Figure 5 the pole piece that the cathode size using traditional handicraft to produce makes has cut, and the pole piece that the cathode size using the present invention to produce in Fig. 5 makes is more smooth.
Claims (8)
1. a manufacture method for cathode of lithium battery slurry, is characterized in that operating procedure is as follows:
1) following raw material is prepared burden by mass percentage: oil-based solvent 10 ~ 30%, conductive agent 1 ~ 3%, deionized water 30 ~ 50%, thickener 1 ~ 3%, negative material 30 ~ 50%, binding agent 2 ~ 4%;
2) by oil-based solvent and conductive agent mixing, fully stir evenly with de-airing mixer, obtained mixture A;
3) deionized water is mixed with thickener, fully stir evenly with mixer, obtained mixture B;
4) mixture A and mixture B is fully mixed to get mixture C;
5) negative material and binding agent are added in mixture C, after stirring, obtain mixture D;
6) solid content adding deionized water adjustment mixture D is 60 ~ 80% obtained finished products, and the dispersion effect of Hegman fineness grind instrument judgement slurry with 0 ~ 50 micron.
2. the manufacture method of cathode of lithium battery slurry according to claim 1, is characterized in that: described oil-based solvent is one or more in isopropyl alcohol, 1-METHYLPYRROLIDONE, ethanol.
3. the manufacture method of cathode of lithium battery slurry according to claim 1, is characterized in that: one or more in described conductive agent carbon black, Graphene, scale graphite, carbon nano-tube.
4. the manufacture method of cathode of lithium battery slurry according to claim 1, is characterized in that: described thickener is one or more in sodium carboxymethylcellulose, polyanion cellulose.
5. the manufacture method of cathode of lithium battery slurry according to claim 1, is characterized in that: described negative material is one or more in native graphite, Delanium, carbosphere, hard carbon, coke.
6. the manufacture method of cathode of lithium battery slurry according to claim 1, is characterized in that: described binding agent is one or more in butadiene-styrene rubber, polytetrafluoroethylene, polyacrylonitrile.
7. the manufacture method of cathode of lithium battery slurry according to claim 1, is characterized in that: the content of described oil-based solvent is 5 ~ 30% of deionized water content.
8. the manufacture method of cathode of lithium battery slurry according to claim 1, is characterized in that: described step 2) in the mixing temperature of deionized water and thickener be 45 ~ 55 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510415265.2A CN105047938A (en) | 2015-07-16 | 2015-07-16 | Preparation method for anode paste of lithium battery |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105336937A (en) * | 2015-12-17 | 2016-02-17 | 中国有色桂林矿产地质研究院有限公司 | Negative electrode sizing agent for manufacturing lithium ion battery negative electrode, preparation method of negative electrode sizing agent, lithium ion battery negative electrode and battery |
| CN106299272A (en) * | 2016-08-22 | 2017-01-04 | 浙江金开来新能源科技有限公司 | A kind of preparation method of silica flour doped lithium ion power battery cathode slurry |
| CN107256969A (en) * | 2017-06-13 | 2017-10-17 | 中国电子新能源（武汉）研究院有限责任公司 | Sodium-ion battery cathode size and preparation method thereof |
| CN109638287A (en) * | 2018-12-04 | 2019-04-16 | 湖北融通高科先进材料有限公司 | The preparation method of negative electrode slurry and the method for solving negative electrode slurry gel problem |
| CN109817985A (en) * | 2019-03-25 | 2019-05-28 | 福建冠城瑞闽新能源科技有限公司 | A kind of lithium ion battery anode slurry stabilizer and preparation method thereof, application |
| CN110048082A (en) * | 2019-04-03 | 2019-07-23 | 合肥国轩高科动力能源有限公司 | Method for reducing orientation value of graphite negative pole piece of lithium ion battery and pole piece obtained by method |
| CN111146436A (en) * | 2020-03-04 | 2020-05-12 | 广东博龙能源科技有限公司 | Oily negative electrode material and preparation process thereof |
| CN111900391A (en) * | 2020-06-19 | 2020-11-06 | 温州大学新材料与产业技术研究院 | Lithium ion battery cathode slurry and preparation method thereof |
| CN113013372A (en) * | 2021-02-22 | 2021-06-22 | 江西省允福亨新能源有限责任公司 | Preparation method of aqueous anode and cathode slurry of lithium ion battery |
| CN113471407A (en) * | 2021-07-02 | 2021-10-01 | 黑龙江普莱德新材料科技有限公司 | Preparation method of oily system negative electrode slurry and lithium battery negative electrode piece |
| CN114628648A (en) * | 2021-07-08 | 2022-06-14 | 万向一二三股份公司 | High-performance silicon-carbon negative electrode piece and preparation method thereof |
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| CN101132062A (en) * | 2006-08-24 | 2008-02-27 | 比亚迪股份有限公司 | Electrode slurry preparing method |
| CN101262077A (en) * | 2008-04-29 | 2008-09-10 | 上海德朗能电池有限公司 | A high-capacity secure 26650 lithium ion battery and its making method |
| CN103094574A (en) * | 2011-10-27 | 2013-05-08 | 焦作市亿锂达能源科技有限公司 | Roll sticking prevention lithium battery cathode material and preparation method thereof |
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2015
- 2015-07-16 CN CN201510415265.2A patent/CN105047938A/en active Pending
Patent Citations (3)
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| CN101132062A (en) * | 2006-08-24 | 2008-02-27 | 比亚迪股份有限公司 | Electrode slurry preparing method |
| CN101262077A (en) * | 2008-04-29 | 2008-09-10 | 上海德朗能电池有限公司 | A high-capacity secure 26650 lithium ion battery and its making method |
| CN103094574A (en) * | 2011-10-27 | 2013-05-08 | 焦作市亿锂达能源科技有限公司 | Roll sticking prevention lithium battery cathode material and preparation method thereof |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105336937A (en) * | 2015-12-17 | 2016-02-17 | 中国有色桂林矿产地质研究院有限公司 | Negative electrode sizing agent for manufacturing lithium ion battery negative electrode, preparation method of negative electrode sizing agent, lithium ion battery negative electrode and battery |
| CN106299272A (en) * | 2016-08-22 | 2017-01-04 | 浙江金开来新能源科技有限公司 | A kind of preparation method of silica flour doped lithium ion power battery cathode slurry |
| CN107256969A (en) * | 2017-06-13 | 2017-10-17 | 中国电子新能源（武汉）研究院有限责任公司 | Sodium-ion battery cathode size and preparation method thereof |
| CN109638287A (en) * | 2018-12-04 | 2019-04-16 | 湖北融通高科先进材料有限公司 | The preparation method of negative electrode slurry and the method for solving negative electrode slurry gel problem |
| CN109817985A (en) * | 2019-03-25 | 2019-05-28 | 福建冠城瑞闽新能源科技有限公司 | A kind of lithium ion battery anode slurry stabilizer and preparation method thereof, application |
| CN110048082A (en) * | 2019-04-03 | 2019-07-23 | 合肥国轩高科动力能源有限公司 | Method for reducing orientation value of graphite negative pole piece of lithium ion battery and pole piece obtained by method |
| CN111146436A (en) * | 2020-03-04 | 2020-05-12 | 广东博龙能源科技有限公司 | Oily negative electrode material and preparation process thereof |
| CN111900391A (en) * | 2020-06-19 | 2020-11-06 | 温州大学新材料与产业技术研究院 | Lithium ion battery cathode slurry and preparation method thereof |
| CN111900391B (en) * | 2020-06-19 | 2022-01-11 | 温州大学新材料与产业技术研究院 | Lithium ion battery cathode slurry and preparation method thereof |
| CN113013372A (en) * | 2021-02-22 | 2021-06-22 | 江西省允福亨新能源有限责任公司 | Preparation method of aqueous anode and cathode slurry of lithium ion battery |
| CN113471407A (en) * | 2021-07-02 | 2021-10-01 | 黑龙江普莱德新材料科技有限公司 | Preparation method of oily system negative electrode slurry and lithium battery negative electrode piece |
| CN113471407B (en) * | 2021-07-02 | 2022-11-15 | 黑龙江普莱德新材料科技有限公司 | Preparation method of oily system negative electrode slurry and lithium battery negative electrode plate |
| CN114628648A (en) * | 2021-07-08 | 2022-06-14 | 万向一二三股份公司 | High-performance silicon-carbon negative electrode piece and preparation method thereof |
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