Preparation method of diaphragm containing solid electrolyte coating and application of diaphragm containing solid electrolyte coating

A solid electrolyte and separator technology, applied in solid electrolyte, electrolyte battery manufacturing, electrolyte and other directions, can solve the problems of low first-efficiency capacitor retention rate, low battery lithium conductivity, etc., to overcome the strong shuttle effect, inhibit the amount of dissolution, The effect of improving battery performance

Active Publication Date: 2019-10-15
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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  • Preparation method of diaphragm containing solid electrolyte coating and application of diaphragm containing solid electrolyte coating
  • Preparation method of diaphragm containing solid electrolyte coating and application of diaphragm containing solid electrolyte coating
  • Preparation method of diaphragm containing solid electrolyte coating and application of diaphragm containing solid electrolyte coating

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. The diaphragm containing solid electrolyte coating comprises a diaphragm basal membrane and a solid electrolyte coating, wherein the thickness of the solid electrolyte coating is 5-20 [mu]m, and the solid electrolyte coating uniformly covers the two surfaces or the dual-side surfaces of the diaphragm basal membrane; the solid electrolyte coating comprises the following raw materials in parts by weight: 0.5-2 parts of a dispersing agent, 10-40 parts of a solid electrolyte, 1-5 parts of a binder, 50-100 parts of a solvent A and 50-100 parts of a solvent B. The invention also discloses a preparation method of the diaphragm, and the diaphragm prepared by the method has the advantages of a very smooth surface, an improved lithium conducting performance and a good cycle performance of the battery.

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 Applications(China)
IPC IPC(8): H01M10/04H01M10/0562H01M10/0565H01M10/058H01M2/14
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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