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High-performance adhesive and application thereof in electrode preparation

A binder and high-performance technology, applied in the direction of non-polymer binder additives, adhesives, battery electrodes, etc., can solve the problems that cannot be improved well, and achieve good cycle performance and long cycle life.

Inactive Publication Date: 2013-07-17
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

By reducing the particle size, the capacity decay is slowed down to a certain extent, but it is still not well improved

Method used

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  • High-performance adhesive and application thereof in electrode preparation
  • High-performance adhesive and application thereof in electrode preparation
  • High-performance adhesive and application thereof in electrode preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This example is used to illustrate the preparation of the binder of the present invention and its use in the production of FeS electrodes, as well as its application in lithium-ion batteries.

[0027] Weigh NaAlg and CMC according to the mass ratio of 5:5, grind and mix well before use. The preparation process of the FeS electrode is as follows: Weigh the FeS powder, the conductive additive acetylene black, and the binder NaAlg and CMC mixed powder of the present invention in a ratio of 8:1:1. After grinding and mixing FeS powder and acetylene black, add binder powder to grind and mix evenly, then add an appropriate amount of distilled water, and grind until a uniform black paste is formed. Then the slurry is evenly coated on the copper foil, and the slurry is dried to form a uniform film, which is well bonded to the copper foil. The dried pole pieces were cut into 8×8mm pole pieces, dried under vacuum conditions at 100oC for 10 hours, and then transferred into a glove...

Embodiment 2

[0029] This example is used to illustrate the preparation of the binder of the present invention and its use in the production of FeS electrodes, as well as its application in lithium-ion batteries.

[0030] Weigh NaAlg and CMC according to the mass ratio of 6:4, grind and mix well before use. FeS electrode preparation, battery assembly and testing process are the same as in Example 1. The discharge capacity of the battery in the first week was 570mAh / g, the efficiency in the first week was 82.3%, and the capacity retention rate after 20 weeks was 93.7%.

Embodiment 3

[0032] This example is used to illustrate the preparation of the binder of the present invention and its use in the production of FeS electrodes, as well as its application in lithium-ion batteries.

[0033] Weigh NaAlg and CMC according to the mass ratio of 8:2, grind and mix well before use. FeS electrode preparation, battery assembly and testing process are the same as in Example 1. The discharge capacity of the battery in the first week was 560mAh / g, the efficiency in the first week was 80.5%, and the capacity retention rate after 20 weeks was 94.1%.

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Abstract

The invention discloses a high-performance adhesive and an application thereof in electrode preparation. The adhesive comprises, by mass, 10-90% of sodium alginate and balance of sodium carboxymethylcellulose. The electrode provided by the invention can be used in lithium ion batteries, sodium ion batteries, super capacitors, and the like. The improvements of the lithium ion batteries, sodium ion batteries, super capacitors, and the like are in that the adhesive provided by the invention is adopted, such that the batteries are provided with good circulation performances. The lithium ion batteries, sodium ion batteries, super capacitors, and the like have the characteristics such as long circulation live, such that the batteries are especially suitable for large-scale energy storage batteries required by solar energy and wind power generation, and large-scale energy storage devices such as an intelligent power peaking device.

Description

technical field [0001] The invention relates to a mixed binder and its application in electrode preparation, lithium ion battery, sodium ion battery, supercapacitor and the like. Background technique [0002] Lithium-ion batteries have been widely used in the power supply of mobile phones, laptops, cameras and other small mobile devices, and have become an indispensable part of our daily life. In recent years, lithium-ion batteries have also begun to be used in power batteries for electric vehicles and energy storage batteries for smart grids. [0003] The performance of lithium-ion batteries has a great relationship with the production process of the pole piece, such as the choice of binder, the proportion of active materials, carbon black, and binder, etc. The currently commonly used binder is polyvinylidene fluoride (PVDF) in NMP (N-methylpyrrolidone) solution. The use of PVDF binder is easy to form slurry, and the slurry has good fluidity, and has been widely used in c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J105/04C09J101/26C09J9/02C09J11/04H01M4/62
CPCY02E60/10
Inventor 胡勇胜赵亮王跃生潘慧霖李泓陈立泉
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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