A preparation method and application of a solid-state electrolyte coating diaphragm

A technology of solid electrolyte and diaphragm, which is applied in the direction of solid electrolyte, electrolyte battery manufacturing, electrolyte, etc., can solve the problems of low lithium conduction performance of batteries, low first-efficiency capacitance retention rate, etc., to overcome strong shuttle effect and good dispersion effect , the effect of performance improvement

Active Publication Date: 2021-12-24
江西力能新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lithium battery is a green power source developed in the 1990s and is known as the dominant power source in the 21st century. However, the batteries in the prior art generally include pole pieces, separators and electrolytes, but the lithium-conducting performance of the battery is not high, and the first The efficiency (capacitance retention rate of the first charge and discharge battery) is also relatively low

Method used

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  • A preparation method and application of a solid-state electrolyte coating diaphragm
  • A preparation method and application of a solid-state electrolyte coating diaphragm
  • A preparation method and application of a solid-state electrolyte coating diaphragm

Examples

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Effect test

Embodiment 1

[0025] A diaphragm containing a solid electrolyte coating, comprising a diaphragm base film 4 and a solid electrolyte coating 401, the thickness of the solid electrolyte coating 401 is 5 μm, and the solid electrolyte coating 401 evenly covers both surfaces of the diaphragm base film 4;

[0026] The solid electrolyte coating 401 includes the following raw materials, calculated in parts by weight, 0.5 parts of dispersant, 10 parts of solid electrolyte, 1 part of binder, 100 parts of solvent A, and 100 parts of solvent B.

[0027] The material of the diaphragm base film 4 is polyethylene.

[0028] A preparation method for a diaphragm containing a solid electrolyte coating, comprising the following steps:

[0029] S1: first disperse the dispersant into solvent A to obtain a dispersion solution, then spray the dispersion solution into a container with a solid electrolyte through an atomizing nozzle, and stir for 1 hour at the same time, the stirring speed is 800r / min, and the prepa...

Embodiment 2

[0042] A diaphragm containing a solid electrolyte coating, comprising a diaphragm base film and a solid electrolyte coating, the thickness of the solid electrolyte coating is 10 μm, and the solid electrolyte coating evenly covers both surfaces of the diaphragm base film;

[0043] The solid electrolyte coating includes the following raw materials, calculated in parts by weight, 1 part of dispersant, 25 parts of solid electrolyte, 3 parts of binder, 100 parts of solvent A, and 100 parts of solvent B.

[0044] The material of the diaphragm base film is polyethylene.

[0045] A preparation method for a diaphragm containing a solid electrolyte coating, comprising the following steps:

[0046] S1: first disperse the dispersant into solvent A to obtain a dispersion solution, then spray the dispersion solution into a container with a solid electrolyte through an atomizing nozzle, and stir for 2 hours at the same time at a stirring rate of 800r / min. get dispersion slurry;

[0047] S2...

Embodiment 3

[0059] A diaphragm containing a solid electrolyte coating, comprising a diaphragm base film 4 and a solid electrolyte coating 401, the thickness of the solid electrolyte coating 401 is 20 μm, and the solid electrolyte coating 401 evenly covers both surfaces of the diaphragm base film 4;

[0060] The solid electrolyte coating 401 includes the following raw materials, calculated in parts by weight, 2 parts of dispersant, 40 parts of solid electrolyte, 5 parts of binder, 100 parts of solvent A, and 100 parts of solvent B.

[0061] The material of the diaphragm base film 4 is polyacrylonitrile.

[0062] A preparation method for a diaphragm containing a solid electrolyte coating, comprising the following steps:

[0063] S1: first disperse the dispersant into solvent A to obtain a dispersion solution, then spray the dispersion solution into a container with a solid electrolyte through an atomizing nozzle, and stir for 3 hours at the same time, with a stirring speed of 800r / min. get...

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Abstract

The invention discloses a diaphragm containing a solid electrolyte coating, comprising a diaphragm base film and a solid electrolyte coating, the solid electrolyte coating has a thickness of 5-20 μm, and the solid electrolyte coating evenly covers both surfaces or both Side surface; the solid electrolyte coating includes the following raw materials, calculated in parts by weight, dispersant 0.5-2 parts, solid electrolyte 10-40 parts, binder 1-5 parts, solvent A50-100 parts, solvent B50-parts 100 copies. At the same time, a preparation method of the diaphragm is also disclosed. The surface of the diaphragm prepared by the method is very smooth, the performance of conducting lithium is improved, and the cycle performance of the battery is good.

Description

technical field [0001] The invention belongs to the field of diaphragms for new energy batteries, and in particular relates to a preparation method and application of a diaphragm containing a solid electrolyte coating. Background technique [0002] Batteries are used in everything from electric vehicles and handheld devices to microchips. With the advancement of society and technology, people's lifestyles have put forward higher requirements on battery performance, and researchers from all over the world have been working on developing better chemical power sources. Lithium battery is a green power source developed in the 1990s and is known as the dominant power source in the 21st century. However, the batteries in the prior art generally include pole pieces, separators and electrolytes, but the lithium-conducting performance of the battery is not high, and the first The efficiency efficiency (capacitance retention rate of the battery charged and discharged for the first ti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/04H01M10/0562H01M10/0565H01M10/058H01M50/417H01M50/414
CPCH01M10/0562H01M10/0565H01M10/058H01M10/04H01M2300/0065H01M2300/0091H01M50/403Y02E60/10Y02P70/50
Inventor 侯伟侯民郭农庆
Owner 江西力能新能源科技有限公司
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