CN109428075A - A kind of flexible improvement technique of high compacted density nickle cobalt lithium manganate positive plate - Google Patents
A kind of flexible improvement technique of high compacted density nickle cobalt lithium manganate positive plate Download PDFInfo
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- CN109428075A CN109428075A CN201710745162.1A CN201710745162A CN109428075A CN 109428075 A CN109428075 A CN 109428075A CN 201710745162 A CN201710745162 A CN 201710745162A CN 109428075 A CN109428075 A CN 109428075A
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- Prior art keywords
- glue
- roll
- lithium manganate
- nickle cobalt
- cobalt lithium
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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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
-
- 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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
-
- 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)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention discloses a kind of flexible improvement techniques of high compacted density nickle cobalt lithium manganate positive plate, comprising: (1) first prepares glue, solvent NMP and binder PVDF is prepared glue；(2) SEBS toughener high-speed stirred is added in glue and glue is made；(3) carbon nanotube CNT conductive agent glue is added to glue according to 0.8%~1.0% ratio of dry-mixed weight and mixes dispersion by slurry preparation；(4) it leads 97%~98% nickle cobalt lithium manganate of addition slurry weight and dispersion is sufficiently stirred in 0.5%~0.7% bulky grain graphite KS-6；(5) it is coated and electrode slice is made, then roll-in, slitting is at pole piece after roll-in.Phenomena such as addition of SEBS of the present invention can effectively improve the flexibility of nickle cobalt lithium manganate positive plate, slow down the stress being subject to when its made electrode slice roll-in, solve pole piece " crisp chip ", " part ", improves the harvest rate and performance of lithium ion battery product.
Description
Technical field
The present invention relates to technical field of lithium ion, and in particular to arrives a kind of high compacted density nickle cobalt lithium manganate positive plate
Flexible improvement technique.
Background technique
Lithium-ion-power cell is high with its operating voltage, energy density is big, good cycle, highly-safe, environmental-friendly
Etc. advantages be widely used to the fields such as electric vehicle, electric tool and power grid energy storage.Wherein, as influence lithium-ion-power cell
The research and development of critical material-positive electrode, the production of performance are most important.Because of the dependence of rare cobalt resource, nickle cobalt lithium manganate
Tertiary cathode material gradually rises, but due to there are many seams between nickle cobalt lithium manganate tertiary cathode material microscopic appearance time crystal grain
Gap defect, two when this microscopic particles pattern causes the compacted density of nickle cobalt lithium manganate tertiary cathode material low and electrode roll-in
Broken, generation " crisp chip ", " part " poor so as to cause nickle cobalt lithium manganate positive plate flexibility after electrode roll-in of secondary spheric granules
Phenomena such as, affect the performance and harvest rate of battery.
Summary of the invention
The purpose of the present invention is to provide a kind of flexible improvement techniques of high compacted density nickle cobalt lithium manganate positive plate, mention
The flexibility for rising positive plate slows down the stress being subject to when its made electrode slice roll-in, and it is " crisp to solve nickle cobalt lithium manganate positive plate
Phenomena such as piece ", " part ", promotes the harvest rate of product.
To achieve the above object, technical scheme is as follows:
A kind of flexible improvement technique of high compacted density nickle cobalt lithium manganate positive plate, the technique include the following steps:
(1) glue is first prepared, by N-Methyl pyrrolidone (NMP) solvent and high polymer binder PVDF(Kynoar) it presses
The proportion for being 98%~99% according to solid content is manufactured into pole piece glue, carries out scraping cylinder after stirring at low speed 5min~15min；
(2) after scraping cylinder, the SEBS(SEBS that linear structure is added in glue is using polystyrene as end segment, with polybutadiene
The ethylene-butene copolymer for adding hydrogen to obtain is the linear tri-block copolymer of intermediate elastic block) glue is made in toughener high-speed stirred
Liquid, additional amount are the 5% of PVDF weight；
(3) slurry preparation, according to dry-mixed weight 0.8%~1.0% ratio by carbon nanotube CNT conductive agent glue be added to glue into
Row mixing dispersion；
(4) conductive agent is after glue is fully dispersed, and 97%~98% nickle cobalt lithium manganate and 0.5%~0.7% of slurry weight is added
Dispersion is sufficiently stirred in bulky grain graphite KS-6；The addition of bulky grain graphite can effectively slow down the stress that pole piece receives, and increase aluminium foil
Foil tensile strength improves flexibility, " crisp chip ", " part " phenomenon after preventing electrode slice roll-in；
(5) it is coated after the completion of slurry preparation and electrode slice is made, then carry out roll-in, roll-in mode uses the small pressure of small―gap suture
Mode carries out roll-in, and slitting is at pole piece after roll-in.
The beneficial effects of the present invention are the addition of SEBS can effectively improve the flexible of nickle cobalt lithium manganate positive plate
Property, slow down the stress being subject to when its made electrode slice roll-in, it is existing to solve nickle cobalt lithium manganate positive plate " crisp chip ", " part " etc.
As improving the harvest rate of lithium ion battery product, improving the performance of lithium ion battery.
Detailed description of the invention
Fig. 1 is the flexible improvement process flow chart of a kind of high compacted density nickle cobalt lithium manganate positive plate of the invention.
Fig. 2 is that the present invention improves nickle cobalt lithium manganate positive plate structural schematic diagram.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical solution of the present invention is clearly and completely described, it is clear that retouched
The embodiment stated is only a part of the embodiment of the present invention, instead of all the embodiments.
Embodiment 1:
(1) first prepare glue, by N-Methyl pyrrolidone solvent and high molecular weight binder PVDF according to solid content be 98%~
99% proportion is manufactured into pole piece glue, carries out scraping cylinder after stirring at low speed 5min~15min；
(2) after scraping cylinder, glue is made in the SEBS toughener high-speed stirred that linear structure is added in glue, and additional amount is PVDF weight
The 5% of amount；
(3) carbon nanotube CNT conductive agent glue is added to glue according to 0.8% ratio of dry-mixed weight and mixed by slurry preparation
Dispersion；
(4) 97%~98% nickle cobalt lithium manganate of slurry weight and 0.5% bulky grain is added after glue is fully dispersed in conductive agent
Dispersion is sufficiently stirred in graphite KS-6；The addition of bulky grain graphite can effectively slow down the stress that pole piece receives, and it is anti-to increase aluminium foil foil
Tensile strength improves flexibility, " crisp chip ", " part " phenomenon after preventing electrode slice roll-in；
(5) it is coated after the completion of slurry preparation and electrode slice is made, then carry out roll-in, roll-in mode uses the small pressure of small―gap suture
Mode carries out roll-in, and slitting is at pole piece after roll-in.
Embodiment 2:
(1) first prepare glue, by N-Methyl pyrrolidone solvent and high molecular weight binder PVDF according to solid content be 98%~
99% proportion is manufactured into pole piece glue, carries out scraping cylinder after stirring at low speed 5min~15min；
(2) after scraping cylinder, glue is made in the SEBS toughener high-speed stirred that linear structure is added in glue, and additional amount is PVDF weight
The 5% of amount；
(3) carbon nanotube CNT conductive agent glue is added to glue according to 0.9% ratio of dry-mixed weight and mixed by slurry preparation
Dispersion；
(4) 97%~98% nickle cobalt lithium manganate of slurry weight and 0.6% bulky grain is added after glue is fully dispersed in conductive agent
Dispersion is sufficiently stirred in graphite KS-6；The addition of bulky grain graphite can effectively slow down the stress that pole piece receives, and it is anti-to increase aluminium foil foil
Tensile strength improves flexibility, " crisp chip ", " part " phenomenon after preventing electrode slice roll-in；
(5) it is coated after the completion of slurry preparation and electrode slice is made, then carry out roll-in, roll-in mode uses the small pressure of small―gap suture
Mode carries out roll-in, and slitting is at pole piece after roll-in.
Embodiment 3:
(1) first prepare glue, by N-Methyl pyrrolidone solvent and high molecular weight binder PVDF according to solid content be 98%~
99% proportion is manufactured into pole piece glue, carries out scraping cylinder after stirring at low speed 5min~15min；
(2) after scraping cylinder, glue is made in the SEBS toughener high-speed stirred that linear structure is added in glue, and additional amount is PVDF weight
The 1% of amount；
(3) carbon nanotube CNT conductive agent glue is added to glue according to 1.0% ratio of dry-mixed weight and mixed by slurry preparation
Dispersion；
(4) 97%~98% nickle cobalt lithium manganate of slurry weight and 0.7% bulky grain is added after glue is fully dispersed in conductive agent
Dispersion is sufficiently stirred in graphite KS-6；The addition of bulky grain graphite can effectively slow down the stress that pole piece receives, and it is anti-to increase aluminium foil foil
Tensile strength improves flexibility, " crisp chip ", " part " phenomenon after preventing electrode slice roll-in；
(5) it is coated after the completion of slurry preparation and electrode slice is made, then carry out roll-in, roll-in mode uses the small pressure of small―gap suture
Mode carries out roll-in, and slitting is at pole piece after roll-in.
The addition of SEBS can effectively improve the flexibility of nickle cobalt lithium manganate positive plate in the present invention, slow down made by it
Phenomena such as stress being subject to when electrode slice roll-in, solution nickle cobalt lithium manganate positive plate " crisp chip ", " part ", improve lithium ion battery
The harvest rate of product, improves the performance of lithium ion battery.
The above content is just an example and description of the concept of the present invention, affiliated those skilled in the art
It makes various modifications or additions to the described embodiments or is substituted in a similar manner, without departing from invention
Design or beyond the scope defined by this claim, be within the scope of protection of the invention.
Claims (1)
1. a kind of flexible improvement technique of high compacted density nickle cobalt lithium manganate positive plate, which is characterized in that the technique includes such as
Lower step:
(1) glue is first prepared, by N-Methyl pyrrolidone (NMP) solvent and high polymer binder PVDF(Kynoar) it presses
The proportion for being 98%~99% according to solid content is manufactured into pole piece glue, carries out scraping cylinder after stirring at low speed 5min~15min；
(2) after scraping cylinder, glue is made in the SEBS toughener high-speed stirred that linear structure is added in glue, and additional amount is PVDF weight
The 5% of amount；
(3) slurry preparation, according to dry-mixed weight 0.8%~1.0% ratio by carbon nanotube CNT conductive agent glue be added to glue into
Row mixing dispersion；
(4) conductive agent is after glue is fully dispersed, and 97%~98% nickle cobalt lithium manganate and 0.5%~0.7% of slurry weight is added
Dispersion is sufficiently stirred in bulky grain graphite KS-6；
(5) it is coated after the completion of slurry preparation and electrode slice is made, then carry out roll-in, roll-in mode uses the small pressure of small―gap suture
Mode carries out roll-in, and slitting is at pole piece after roll-in.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710745162.1A CN109428075A (en) | 2017-08-26 | 2017-08-26 | A kind of flexible improvement technique of high compacted density nickle cobalt lithium manganate positive plate |
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| CN201710745162.1A CN109428075A (en) | 2017-08-26 | 2017-08-26 | A kind of flexible improvement technique of high compacted density nickle cobalt lithium manganate positive plate |
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| CN109428075A true CN109428075A (en) | 2019-03-05 |
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| CN201710745162.1A Pending CN109428075A (en) | 2017-08-26 | 2017-08-26 | A kind of flexible improvement technique of high compacted density nickle cobalt lithium manganate positive plate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110190249A (en) * | 2019-04-19 | 2019-08-30 | 合肥国轩高科动力能源有限公司 | A kind of conjunction paste-making method of silicon-carbon cathode |
| CN111952546A (en) * | 2020-08-04 | 2020-11-17 | 梅州市量能新能源科技有限公司 | Double-roller continuous rolling device, lithium battery and manufacturing method of positive plate of lithium battery |
Citations (5)
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| US5677074A (en) * | 1996-06-25 | 1997-10-14 | The Dais Corporation | Gas diffusion electrode |
| CN101425573A (en) * | 2007-10-30 | 2009-05-06 | 比亚迪股份有限公司 | High density lithium ionic cell positive pole, manufacturing method and lithium ionic cell |
| CN102110850A (en) * | 2011-01-28 | 2011-06-29 | 福建南平南孚电池有限公司 | Lithium-iron disulfide battery |
| CN103985837A (en) * | 2014-05-30 | 2014-08-13 | 合肥国轩高科动力能源股份公司 | Preparation technology for lithium ion battery electrode slurry |
| CN105470517A (en) * | 2015-11-19 | 2016-04-06 | 东莞市迈科科技有限公司 | Positive electrode and positive electrode paste with high energy density, and battery containing positive electrode |
-
2017
- 2017-08-26 CN CN201710745162.1A patent/CN109428075A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5677074A (en) * | 1996-06-25 | 1997-10-14 | The Dais Corporation | Gas diffusion electrode |
| CN101425573A (en) * | 2007-10-30 | 2009-05-06 | 比亚迪股份有限公司 | High density lithium ionic cell positive pole, manufacturing method and lithium ionic cell |
| CN102110850A (en) * | 2011-01-28 | 2011-06-29 | 福建南平南孚电池有限公司 | Lithium-iron disulfide battery |
| CN103985837A (en) * | 2014-05-30 | 2014-08-13 | 合肥国轩高科动力能源股份公司 | Preparation technology for lithium ion battery electrode slurry |
| CN105470517A (en) * | 2015-11-19 | 2016-04-06 | 东莞市迈科科技有限公司 | Positive electrode and positive electrode paste with high energy density, and battery containing positive electrode |
Non-Patent Citations (1)
| Title |
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| 孔子明主编: "《最新新型工程材料生产新技术应用与新产品开发研制及行业技术标准实用大全 2 橡胶与塑料卷》", 30 November 2004 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110190249A (en) * | 2019-04-19 | 2019-08-30 | 合肥国轩高科动力能源有限公司 | A kind of conjunction paste-making method of silicon-carbon cathode |
| CN111952546A (en) * | 2020-08-04 | 2020-11-17 | 梅州市量能新能源科技有限公司 | Double-roller continuous rolling device, lithium battery and manufacturing method of positive plate of lithium battery |
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Address after: 518105 4th Floor, Building A2, Liyuan Bay Industrial Park, 168 Honghu Road, Yanchuan, Songgang, Baoan District, Shenzhen City, Guangdong Province Applicant after: SHENZHEN GRAND POWERSOURCE Co.,Ltd. Address before: 518105 4th Floor, Building A2, Liyuan Bay Industrial Park, 168 Honghu Road, Yanchuan, Songgang, Baoan District, Shenzhen City, Guangdong Province Applicant before: SHENZHEN GRAND POWERSOURCE Co.,Ltd. |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190305 |
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| RJ01 | Rejection of invention patent application after publication |