CN110212197A - Preparation method of lithium ion battery bonding agent prelithiation and products thereof and application - Google Patents
Preparation method of lithium ion battery bonding agent prelithiation and products thereof and application Download PDFInfo
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- CN110212197A CN110212197A CN201910486445.8A CN201910486445A CN110212197A CN 110212197 A CN110212197 A CN 110212197A CN 201910486445 A CN201910486445 A CN 201910486445A CN 110212197 A CN110212197 A CN 110212197A
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- lithium ion
- bonding agent
- ion battery
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- prelithiation
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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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
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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
- H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
- H01M4/386—Silicon or alloys based on silicon
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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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- 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 Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The present invention proposes preparation method of a kind of lithium ion battery bonding agent prelithiation and products thereof and application, a kind of preparation method of lithium ion battery bonding agent prelithiation, include the following steps: to introduce lithium ion in the polyacrylic acid bonding agent in lithium ion battery electrode material, the molecular formula of the polyacrylic acid bonding agent are as follows: [CH2CH]nCOOH, polyacrylic acid and lithium hydroxide carry out acid base titration, make pH=7, bonding agent molecular formula becomes [CH2CH]nCOOLi；The preparation of electrode slurry uses [CH2CH]nCOOLi reaches prelithiation effect.The invention proposes lithium ion is introduced by the polyacrylic acid bonding agent in electrode material, acid base titration is carried out by polyacrylic acid and lithium hydroxide, preparation method is simple and efficient, and it is easy to operate, and battery head effect is effectively improved, increase battery cycle life.
Description
Technical field
The invention belongs to field of lithium ion battery, and in particular to a kind of system of lithium ion battery cathode binder prelithiation
Preparation Method and products thereof and application, are mainly used in silicon based anode material.
Background technique
With the needs of promotion and the development of human demand, the continuous promotion of lithium ion battery energy density, existing cathode
Material is mainly graphite, and gram volume and compacted density etc., which have played, has used limiting value, therefore, silicon based anode material
Use the hot spot that will be lithium ion battery growth requirement.At the same time, the first charge-discharge efficiency of silica-base material is low, expansion is big,
Long circulating can bring material pulverizing problem and be also current silicon-based anode material to the matching problem of related electrolyte, bonding agent
Expect the resistance of development, therefore, mends the concerns of the technologies increasingly by numerous scientific research personnel such as lithium, prelithiation, and relevant
There have been some progress in field.The technologies such as current prelithiation mainly directly use inertia lithium powder, lithium piece (band) etc., but these
Method has very big security risk, and practical commercial has significant limitations.
Method by bonding agent prelithiation is not only easy to operate, has effectively evaded current directly lacking using lithium metal
Point, in safety, practical commercial industrial etc. has great prospects for development.
Summary of the invention
In view of the deficiencies of the prior art, it is an object of that present invention to provide a kind of lithium ion battery cathode binder prelithiation
Preparation method.
Another object of the present invention is: providing a kind of lithium ion battery cathode binder product of above method preparation.
Another object of the present invention is to: a kind of application of the said goods is provided.
The object of the invention is realized by following proposal: a kind of preparation method of lithium ion battery bonding agent prelithiation, including
Following steps:
(1) lithium ion, the polyacrylic acid bonding agent are introduced in the polyacrylic acid bonding agent in lithium ion battery electrode material
Molecular formula are as follows: [CH2CH]nCOOH, polyacrylic acid and lithium hydroxide carry out acid base titration, reaction equation are as follows:
[CH2CH]nCOOH + LiOH = [CH2CH]nCOOLi+H2O formula 1
When pH is neutral, bonding agent molecular formula is made to become [CH2CH]nCOOLi；
(2) lithium ion battery electrode material slurry preparation uses [CH2CH]nCOOLi reaches prelithiation effect.
On the basis of above scheme, it is viscous that the lithium ion battery electrode material includes at least silicon oxygen material, 5-10 wt%
Tie agent Lithium polyacrylate [CH2CH]n) and 5-10 wt% conductive agent SP COOLi.
The present invention provides a kind of lithium ion battery cathode binder, is prepared according to the above method.
The present invention also provides the applications that a kind of lithium ion battery cathode binder is used for silicon based anode material.
The utility model has the advantages that
The invention proposes lithium ion is introduced by the polyacrylic acid bonding agent in electrode material, pass through polyacrylic acid and hydroxide
Lithium carries out acid base titration, makes pH=7, bonding agent molecular formula becomes [CH2CH]nCOOLi, preparation method are simple and efficient, easy to operate, and
And battery head effect is effectively increased, increase battery cycle life.
Detailed description of the invention
The first effect figure of Fig. 1 comparative example 1；
The first effect figure of Fig. 2 embodiment 2；
The first effect figure of Fig. 3 embodiment 3.
Specific embodiment
The present invention is described in detail by following specific example, but protection scope of the present invention is not only restricted to these
Embodiment.
Comparative example 1
A kind of lithium ion battery cathode binder is used for silicon based anode material, comprising:
(1) silicon oxygen material
(2) binder polyacrylic acid [CH2CH]nCOOH 10 wt%
(3) 10 wt% of conductive agent SP,
It is prepared into button half-cell after coating, stands 24 h after being assembled into battery.
Under conditions of environment temperature is 25 DEG C, charge-discharge test is carried out using new Weir battery test system, is filled
The first effect of electric discharge is as shown in Figure 1, recycle as shown in Figure 1, first effect is 68.8%.
Embodiment 2
A kind of lithium ion battery cathode binder is used for silicon based anode material, comprising:
(1) silicon oxygen material
(2) binder Lithium polyacrylate [CH2CH]nCOOLi 10 wt%
(3) 10 wt% of conductive agent SP,
Silicon oxygen material is mixed into a certain proportion of binder, makes Lithium polyacrylate [CH2CH]nCOOLi and conductive agent SP, after coating
It is prepared into button half-cell, stands 24 h after being assembled into battery.
Under conditions of environment temperature is 25 DEG C, charge-discharge test is carried out using new Weir battery test system, is filled
The first effect of electric discharge is as shown in Fig. 2, first effect is 71.8%, it can be seen that head effect is obviously improved.
Embodiment 3
A kind of lithium ion battery cathode binder is used for silicon based anode material, comprising:
(1) silicon oxygen material
(2) binder Lithium polyacrylate [CH2CH]nCOOLi 5 wt%
(3) 5 wt% of conductive agent SP,
Silicon oxygen material is mixed into a certain proportion of binder Lithium polyacrylate [CH2CH]nCOOLi and conductive agent SP, makes after coating
For at button half-cell, 24 h are stood after being assembled into battery.
Under conditions of environment temperature is 25 DEG C, charge-discharge test is carried out using new Weir battery test system, is filled
The first effect of electric discharge is as shown in figure 3, first effect is 73.2%, it can be seen that head effect is obviously improved.
Claims (4)
1. a kind of preparation method of lithium ion battery bonding agent prelithiation, which comprises the steps of:
(1) lithium ion, the polyacrylic acid bonding agent are introduced in the polyacrylic acid bonding agent in lithium ion battery electrode material
Molecular formula are as follows: [CH2CH]nCOOH, polyacrylic acid and lithium hydroxide carry out acid base titration, reaction equation are as follows:
[CH2CH]nCOOH + LiOH = [CH2CH]nCOOLi+H2O formula 1
When pH=7, bonding agent molecular formula is made to become [CH2CH]nCOOLi；
(2) electrode slurry preparation uses [CH2CH]nCOOLi reaches prelithiation effect.
2. the preparation method of lithium ion battery bonding agent prelithiation according to claim 1, which is characterized in that
The lithium ion battery electrode material is silicon oxygen material, 5-10 wt% binder Lithium polyacrylate [CH2CH]nCOOLi)
With 5-10 wt% conductive agent SP.
3. a kind of lithium ion battery cathode binder, it is characterised in that method according to claim 1 or claim 2 is prepared.
4. the application that a kind of lithium ion battery cathode binder according to claim 3 is used for silicon based anode material.
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| CN201910486445.8A CN110212197A (en) | 2019-06-05 | 2019-06-05 | Preparation method of lithium ion battery bonding agent prelithiation and products thereof and application |
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| CN201910486445.8A CN110212197A (en) | 2019-06-05 | 2019-06-05 | Preparation method of lithium ion battery bonding agent prelithiation and products thereof and application |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110797538A (en) * | 2019-11-07 | 2020-02-14 | 惠州亿纬锂能股份有限公司 | Silicon-based negative electrode binder, preparation method thereof and application thereof in lithium ion battery |
| CN113782744A (en) * | 2021-08-30 | 2021-12-10 | 上海纳米技术及应用国家工程研究中心有限公司 | Method for improving negative performance of high-specific-energy-density silicon monoxide by using lithium ion modified binder |
| CN113991101A (en) * | 2021-10-25 | 2022-01-28 | 江苏海基新能源股份有限公司 | Lithium supplementing method for lithium iron phosphate lithium ion battery and lithium iron phosphate lithium ion battery |
| CN116259759A (en) * | 2023-03-22 | 2023-06-13 | 湖北亿纬动力有限公司 | Lithium supplementing binder and preparation method and application thereof |
| CN117117077A (en) * | 2023-01-13 | 2023-11-24 | 荣耀终端有限公司 | Negative electrode plate, preparation method of negative electrode plate and lithium ion battery |
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| CN105742640A (en) * | 2016-03-11 | 2016-07-06 | 湖州创亚动力电池材料有限公司 | Binder suitable for silicon-based negative electrode material of lithium ion battery, manufacturing method for binder and negative electrode material |
| CN108649226A (en) * | 2018-03-22 | 2018-10-12 | 惠州市赛能电池有限公司 | A kind of aqueous binders, preparation method and the lithium ion battery using the binder |
| CN109251257A (en) * | 2018-08-10 | 2019-01-22 | 中国科学院青海盐湖研究所 | Lithium polyacrylate and preparation method thereof, purposes and lithium ion battery |
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2019
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| CN108649226A (en) * | 2018-03-22 | 2018-10-12 | 惠州市赛能电池有限公司 | A kind of aqueous binders, preparation method and the lithium ion battery using the binder |
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| KEVIN A.HAYS 等: "What makes lithium substituted polyacrylic acid a better binder than polyacrylic acid for silicon-graphite composite anodes?", 《JOURNAL OF POWER SOURCES》 * |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110797538A (en) * | 2019-11-07 | 2020-02-14 | 惠州亿纬锂能股份有限公司 | Silicon-based negative electrode binder, preparation method thereof and application thereof in lithium ion battery |
| CN113782744A (en) * | 2021-08-30 | 2021-12-10 | 上海纳米技术及应用国家工程研究中心有限公司 | Method for improving negative performance of high-specific-energy-density silicon monoxide by using lithium ion modified binder |
| CN113782744B (en) * | 2021-08-30 | 2022-12-27 | 上海纳米技术及应用国家工程研究中心有限公司 | Method for improving negative performance of high-specific-energy-density silicon monoxide by using lithium ion modified binder |
| CN113991101A (en) * | 2021-10-25 | 2022-01-28 | 江苏海基新能源股份有限公司 | Lithium supplementing method for lithium iron phosphate lithium ion battery and lithium iron phosphate lithium ion battery |
| CN117117077A (en) * | 2023-01-13 | 2023-11-24 | 荣耀终端有限公司 | Negative electrode plate, preparation method of negative electrode plate and lithium ion battery |
| CN116259759A (en) * | 2023-03-22 | 2023-06-13 | 湖北亿纬动力有限公司 | Lithium supplementing binder and preparation method and application thereof |
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