CN108270009A - A kind of nickle cobalt lithium manganate positive plate flexibility improves technique - Google Patents
A kind of nickle cobalt lithium manganate positive plate flexibility improves technique Download PDFInfo
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- CN108270009A CN108270009A CN201710000123.9A CN201710000123A CN108270009A CN 108270009 A CN108270009 A CN 108270009A CN 201710000123 A CN201710000123 A CN 201710000123A CN 108270009 A CN108270009 A CN 108270009A
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- Prior art keywords
- lithium manganate
- cobalt lithium
- positive plate
- glue
- nickle cobalt
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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
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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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
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
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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
- H01M4/04—Processes of manufacture in general
- H01M4/043—Processes of manufacture in general involving compressing or compaction
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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
- H01M4/1391—Processes of manufacture of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
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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
- H01M4/628—Inhibitors, e.g. gassing inhibitors, corrosion inhibitors
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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
A kind of nickle cobalt lithium manganate positive plate flexibility improves technique, including（1）First by little particle graphite using ball mill by its ball milling into " spherical " shape；（2）Prepare Kynoar（PVDF）Glue；（3）Electrocondution slurry is prepared, nano-level conducting agent is added in and carries out mixing dispersion to glue；（4）Nickel-cobalt lithium manganate cathode material and little particle graphite are added in, carries out mixing dispersion；（5）Be coated after the completion of slurry preparation, then carry out roll-in, nickle cobalt lithium manganate positive plate is made in slitting, cut-parts.The addition of little particle graphite can effectively slow down the stress that pole piece receives after ball milling of the present invention, increase aluminium foil foil tensile strength, improve flexibility, prevent " crisp chip " after electrode slice roll-in, " part " phenomenon, improve the flexibility of pole piece；Little particle graphite can into spatially complementation be tamped inside pole piece with nano-level conducting dosage form after ball milling simultaneously, the electric conductivity of pole piece can be improved to a certain extent, so as to improve the chemical property of battery.
Description
Technical field
It is specifically a kind of the present invention relates to technical field of lithium ion, particularly lithium ion power battery technology field
Nickle cobalt lithium manganate positive plate flexibility improves technique.
Background technology
Lithium-ion-power cell is with its operating voltage is high, energy density is big, have extended cycle life, memory-less effect, quickly fill
Electricity, self discharge is small, operating temperature range is wide, the advantages such as environmental-friendly have been widely used for electric vehicle, electric tool and energy storage
The fields such as power grid.Wherein, as the critical material for influencing lithium-ion-power cell performance, the development ＆ production of positive electrode is to closing weight
It will.Because of the dependence of rare cobalt resource, nickle cobalt lithium manganate tertiary cathode material gradually rises, but due to nickle cobalt lithium manganate ternary
There are many gap defects, this microscopic particles pattern between material microscopic appearance time crystal grain to lead to cobalt nickel lithium manganate ternary material
Compacted density is low and during electrode roll-in secondary spherical particle it is broken, flexibility is poor after leading to electrode roll-in, occurs " crisp
Piece ", " part " phenomenon, have seriously affected the quality of nickle cobalt lithium manganate anode flake products and harvest rate, it is therefore desirable to improve.
Invention content
The purpose of the present invention is to provide a kind of nickle cobalt lithium manganate positive plate flexibilities to improve technique, to promote nickel cobalt mangaic acid
The flexibility of lithium positive plate slows down the stress being subject to during its made electrode slice roll-in, solves " crisp chip ", " part " phenomenon, carries
Rise the quality of product and harvest rate.
To achieve the above object, the present invention provides following technical solution：
A kind of nickle cobalt lithium manganate positive plate flexibility improves technique, is as follows：
（1）First by little particle graphite using ball mill by its ball milling into " spherical " shape；
（2）Glue is prepared, by N-Methyl pyrrolidone solvent（NMP）And high molecular weight binding agent Kynoar（PVDF）It presses
Glue is made according to the proportioning that solid content is 98%~99%；Glue plays the anti-precipitation of thickening；
（3）Electrocondution slurry is prepared, and nano-level conducting agent is added to glue according to 1.0%~1.5% ratio of slurry weight carries out
Mixing dispersion；
（4）After conductive agent is fully dispersed in glue, add in slurry weight 97%~98% nickel-cobalt lithium manganate cathode material and
1.0%~1.5% little particle graphite, carries out mixing dispersion；
（5）Be coated after the completion of slurry preparation, then carry out roll-in, nickle cobalt lithium manganate positive plate is made in slitting, cut-parts.
The nano-level conducting agent is conductive black.
The beneficial effects of the present invention are：The addition of little particle graphite can effectively slow down the stress that pole piece receives after ball milling,
Aluminium foil foil tensile strength is increased, improves flexibility, prevents " crisp chip " after electrode slice roll-in, " part " phenomenon, improves pole piece
Flexibility；Little particle graphite can into spatially complementation be tamped inside pole piece with nano-level conducting dosage form after ball milling simultaneously, can be with
The electric conductivity of pole piece is improved to a certain extent, so as to improve the chemical property of battery.
Description of the drawings
A kind of nickle cobalt lithium manganate positive plate flexibility that Fig. 1 is the present invention improves process flow chart.
A kind of nickle cobalt lithium manganate positive plate flexibility that Fig. 2 is the present invention improves pole piece structure schematic diagram after technique.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with specific embodiment
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Embodiment 1
A kind of nickle cobalt lithium manganate positive plate flexibility improves technique, is as follows：
（1）First by little particle graphite using ball mill by its ball milling into " spherical " shape；
（2）Glue is prepared, by N-Methyl pyrrolidone solvent and high molecular weight binding agent Kynoar PVDF according to containing admittedly
Glue is made in the proportioning measured as 98%；
（3）Nano-level conducting agent is added to glue according to 1.0% ratio of slurry weight and carries out mixing dispersion by slurry preparation；
（4）After conductive agent is fully dispersed in glue, add in slurry weight 98% nickel-cobalt lithium manganate cathode material and 1.0% it is small
Granular graphite carries out mixing dispersion；
（5）After being coated after the completion of slurry preparation, then carry out roll-in, nickle cobalt lithium manganate positive plate is made in slitting, cut-parts.
Embodiment 2
A kind of nickle cobalt lithium manganate positive plate flexibility improves technique, is as follows：
（1）First by little particle graphite using ball mill by its ball milling into " spherical " shape；
（2）Glue is prepared, by N-Methyl pyrrolidone solvent and high molecular weight binding agent Kynoar PVDF according to containing admittedly
Glue is made in the proportioning measured as 98.5%；
（3）Nano-level conducting agent is added to glue according to 1.25% ratio of slurry weight and carries out mixing dispersion by slurry preparation；
（4）After conductive agent is fully dispersed in glue, 97.5% nickel-cobalt lithium manganate cathode material and 1.25% of slurry weight is added in
Little particle graphite, carry out mixing dispersion；
（5）After being coated after the completion of slurry preparation, then carry out roll-in, nickle cobalt lithium manganate positive plate is made in slitting, cut-parts.
Embodiment 3
A kind of nickle cobalt lithium manganate positive plate flexibility improves technique, is as follows：
（1）First by little particle graphite using ball mill by its ball milling into " spherical " shape；
（2）Glue is prepared, by N-Methyl pyrrolidone solvent and high molecular weight binding agent Kynoar PVDF according to containing admittedly
Glue is made in the proportioning measured as 99%；
（3）Nano-level conducting agent is added to glue according to 1.5% ratio of slurry weight and carries out mixing dispersion by slurry preparation；
（4）After conductive agent is fully dispersed in glue, add in slurry weight 97% nickel-cobalt lithium manganate cathode material and 1.5% it is small
Granular graphite carries out mixing dispersion；
（5）After being coated after the completion of slurry preparation, then carry out roll-in, nickle cobalt lithium manganate positive plate is made in slitting, cut-parts.
The addition of little particle graphite can effectively slow down the stress that pole piece receives after the above example ball milling of the present invention, increase
Aluminium foil foil tensile strength improves flexibility, prevents " crisp chip " after electrode slice roll-in, " part " phenomenon, improve the soft of pole piece
Toughness；Little particle graphite can into spatially complementation be tamped inside pole piece with nano-level conducting dosage form after ball milling simultaneously, can be one
The electric conductivity of raising pole piece in degree is determined, so as to improve the chemical property of battery.
Above content is only the design example and explanation to the present invention, affiliated those skilled in the art
Various modifications or additions are done to described specific embodiment or are substituted in a similar way, without departing from invention
Design or surmount range defined in the claims, be within the scope of protection of the invention.
Claims (2)
1. a kind of nickle cobalt lithium manganate positive plate flexibility improves technique, which is characterized in that the technique includes the following steps：
（1）First by little particle graphite using ball mill by its ball milling into " spherical " shape；
（2）Glue is prepared, by N-Methyl pyrrolidone solvent（NMP）And high molecular weight binding agent Kynoar（PVDF）It presses
Glue is made according to the proportioning that solid content is 98%~99%；
（3）Electrocondution slurry is prepared, and nano-level conducting agent is added to glue according to 1.0%~1.5% ratio of slurry weight carries out
Mixing dispersion；
（4）After conductive agent is fully dispersed in glue, add in slurry weight 97%~98% nickel-cobalt lithium manganate cathode material and
1.0%~1.5% little particle graphite, carries out mixing dispersion；
（5）Be coated after the completion of slurry preparation, then carry out roll-in, nickle cobalt lithium manganate positive plate is made in slitting, cut-parts.
2. a kind of nickle cobalt lithium manganate positive plate flexibility according to claim 1 improves technique, which is characterized in that described
Nano-level conducting agent is conductive black.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710000123.9A CN108270009A (en) | 2017-01-01 | 2017-01-01 | A kind of nickle cobalt lithium manganate positive plate flexibility improves technique |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710000123.9A CN108270009A (en) | 2017-01-01 | 2017-01-01 | A kind of nickle cobalt lithium manganate positive plate flexibility improves technique |
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| CN108270009A true CN108270009A (en) | 2018-07-10 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110350239A (en) * | 2019-07-08 | 2019-10-18 | 无锡市明杨新能源有限公司 | High magnification lithium ion battery with high energy density |
| 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 (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103531814A (en) * | 2013-10-28 | 2014-01-22 | 深圳格林德能源有限公司 | Composite conductive agent, dispersion method thereof, positive plate and lithium ion battery |
| 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
- 2017-01-01 CN CN201710000123.9A patent/CN108270009A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103531814A (en) * | 2013-10-28 | 2014-01-22 | 深圳格林德能源有限公司 | Composite conductive agent, dispersion method thereof, positive plate and lithium ion battery |
| 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110350239A (en) * | 2019-07-08 | 2019-10-18 | 无锡市明杨新能源有限公司 | High magnification lithium ion battery with high energy density |
| 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 Greende Energy Group 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 Green's moral limited energy company |
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Application publication date: 20180710 |