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Battery diaphragm coating material, preparation method thereof, battery diaphragm and battery

A technology for coating materials and battery separators, which can be used in the direction of separators/films/diaphragms/spacers, secondary batteries, battery components, etc., and can solve problems such as low ion conductivity

Active Publication Date: 2022-01-11
SUNWODA ELECTRIC VEHICLE BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, although the performance of lithium battery diaphragm materials has been improved through a lot of preparation technology improvements and coating modification, the diaphragms currently used in the market still have the problem of low ion conductivity.

Method used

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  • Battery diaphragm coating material, preparation method thereof, battery diaphragm and battery
  • Battery diaphragm coating material, preparation method thereof, battery diaphragm and battery
  • Battery diaphragm coating material, preparation method thereof, battery diaphragm and battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This embodiment provides a battery separator, which is prepared according to the following steps:

[0034] (1) Take 30 parts by mass of carbon nanotubes and 70 parts by mass of lithium lanthanum zirconium oxygen to form a mixture, wherein the ratio of the particle size of the lithium lanthanum zirconium oxide material to the pore size of the carbon nanotubes is 1:3 (referred to as the particle size The pore diameter ratio is 1:3), add 100 parts by mass of solvent deionized water to the mixture, fully grind to obtain a viscous slurry, then transfer the slurry to a three-necked flask, and add 2000 parts by mass of deionized water again, Connect the condensing water device, heat with an oil bath, and carry out heating and reflux reaction at 125°C with mechanical stirring, and the reaction time is 2h.

[0035] (2) Centrifuge the dispersion after the reaction, and then perform suction filtration. After the suction filtration, vacuum dry in a vacuum oven for 48 hours at a dry...

Embodiment 2-13

[0040] Examples 2-13 respectively provide a battery separator, and the preparation process is the same as that of Example 1, except that it is made according to the formula in Table 1.

[0041] The formula composition of battery diaphragm in the embodiment 1-13 of table 1

[0042]

[0043]

[0044] Wherein, the solvent used in the preparation process of Example 8 is absolute ethanol, and the solvent used in Example 9 is ether.

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PUM

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Abstract

The invention discloses a battery diaphragm coating material, a preparation method thereof, a battery diaphragm and a battery. The battery diaphragm coating material comprises a binder and a filling porous material, the filling porous material comprises porous carbon with a pore channel structure and filling particles filled in the pore channel structure, and the filling particles are used for promoting lithium ion migration. The pore channel structure of the porous carbon can build a bridge for rapid migration for lithium ions, so that the lithium ions can migrate in the pore channel structure of the porous carbon. Meanwhile, the pore channel structure of the porous carbon is filled with the filling particles, the filling particles can further promote lithium ion migration, then the formed battery diaphragm coating material has high ionic conductivity, the used porous carbon has a high specific surface area, and a space can be provided for electrolyte accumulation subsequently, so the liquid retention rate of the prepared battery diaphragm can be improved.

Description

technical field [0001] The present application relates to the technical field of battery separators, in particular to a battery separator coating material and a preparation method thereof, a battery separator and a battery. Background technique [0002] In recent years, with the development of the national economy and social progress, energy issues and environmental issues have become the focus of all countries in the world. The excessive consumption of fossil fuels and the further growth of energy demand have promoted the development and utilization of clean energy. [0003] Due to its high energy density, high operating voltage and long cycle life, lithium-ion secondary batteries are currently the preferred power sources for digital and electric vehicle products. As an important part of lithium-ion batteries, the diaphragm directly affects the cost and performance of the battery, because the main function of the diaphragm is to separate the positive and negative electrode...

Claims

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Application Information

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IPC IPC(8): H01M50/403H01M50/443H01M50/491H01M50/409H01M10/0525
CPCH01M50/403H01M50/443H01M50/491H01M50/409H01M10/0525Y02E60/10
Inventor 张林程忠陈守敏张耀
Owner SUNWODA ELECTRIC VEHICLE BATTERY CO LTD
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