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A double-coated diaphragm applied to lithium-selenium disulfide battery and its preparation method and application

A technology of selenium disulfide and battery diaphragm, which is applied in the direction of lithium batteries, battery pack parts, non-aqueous electrolyte batteries, etc., can solve the problem of low surface loading of active materials, and achieve excellent reversible performance, excellent electrochemical performance, and protection The effect of avoiding

Active Publication Date: 2022-02-22
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the above content, the problems existing in the research and development and application of lithium-selenium disulfide batteries in the prior art, in order to solve the problem of the shuttle effect of lithium-selenium disulfide batteries and the low surface loading of active materials based on positive electrode materials , the present invention intends to provide a double-coated diaphragm applied to a lithium-selenium disulfide battery and its preparation method and application

Method used

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  • A double-coated diaphragm applied to lithium-selenium disulfide battery and its preparation method and application
  • A double-coated diaphragm applied to lithium-selenium disulfide battery and its preparation method and application
  • A double-coated diaphragm applied to lithium-selenium disulfide battery and its preparation method and application

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Embodiment 1

[0034] A preparation method for a double-coated diaphragm applied to a lithium-selenium disulfide battery:

[0035] 1) Preparation of raw materials for slurry A: Take 1,3,6,8-tetrakis(4-formylphenyl)perylene and p-phenylenediamine at a molar ratio of 1:2, add 4mL of 1,4-di Oxycycline, then add 3mol / L acetic acid solution, the addition amount is 5% of the total volume of the above organic solvent, then pass through argon and seal it, put the above mixed solution in an oven at 120°C for 72h, and then use 1,4-dioxane, tetrahydrofuran and acetone are washed to obtain yellow powder PA-COF, which is the raw material of coating A;

[0036]2) Preparation of slurry A: Mix PA-COF and LA132 water-based binder prepared in step 1) at a ratio of 5:1, then add 2 mL of n-propanol aqueous solution dropwise, and mix well to obtain slurry A ;

[0037] 3) Preparation of slurry B: take industrial grade TiO 2 powder according to TiO 2 1. Conductive carbon black and water-based binder are fully ...

Embodiment 2

[0040] A preparation method for a double-coated diaphragm applied to a lithium-selenium disulfide battery:

[0041] 1) Preparation of raw materials for slurry A: Take 1,3,6,8-tetrakis(4-formylphenyl)perylene and p-phenylenediamine at a molar ratio of 1:2, add 4mL of 1,4-di Oxycycline, then add 3mol / L acetic acid solution, the addition amount is 5% of the total volume of the above organic solvent, then pass through argon and seal it, put the above mixed solution in an oven at 120°C for 72h, and then use 1,4-dioxane, tetrahydrofuran and acetone are washed to obtain yellow powder PA-COF, which is the raw material of coating A;

[0042] 2) Preparation of slurry A: Mix PA-COF and LA132 water-based binder prepared in step 1) at a ratio of 5:1, then add 2 mL of n-propanol aqueous solution dropwise, and mix well to obtain slurry A ;

[0043] 3) Preparation of slurry B: take industrial grade TiO 2 powder according to TiO 2 1. Conductive carbon black and water-based binder are fully...

Embodiment 3

[0046] A preparation method for a double-coated diaphragm applied to a lithium-selenium disulfide battery:

[0047] 1) Preparation of raw materials for slurry A: Take 1,3,6,8-tetrakis(4-formylphenyl)perylene and p-phenylenediamine at a molar ratio of 1:2, add 4mL of 1,4-di Oxycycline, then add 3mol / L acetic acid solution, the amount added is 50% of the total volume of the above organic solvent, then pass through argon and seal it, put the above mixed solution in an oven at 120°C for 72h, and then use 1,4-dioxane, tetrahydrofuran and acetone are washed to obtain yellow powder PA-COF, which is the raw material of coating A;

[0048] 2) Preparation of slurry A: Mix the PA-COF and LA132 water-based binder prepared in step 1) in a ratio of 3:1, then add 2 mL of n-propanol aqueous solution dropwise, and mix well to obtain slurry A ;

[0049] 3) Preparation of slurry B: take industrial grade TiO 2 powder according to TiO 2 1. Conductive carbon black and water-based binder are ful...

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Abstract

The invention discloses a double-coated diaphragm applied to a lithium-selenium disulfide battery, a preparation method and application thereof, and belongs to the technical field of new materials. The preparation method includes the following steps: 1) reacting 1,3,6,8-tetrakis(4-formylphenyl)perylene, p-phenylenediamine, dioxane and acetic acid solution to prepare PA-COF for coating Raw materials for layer A; 2) Fully mix PA‑COF, water-based binder and n-propanol water prepared in step 1) to obtain slurry A; 3) Take TiO 2 , conductive carbon black, water-based binder, and n-propanol aqueous solution are fully mixed to obtain slurry B; 4) Take slurry A and slurry B and apply them on both sides of the battery separator, dry, and cut into discs. Double coated diaphragm. Its double-coated separator is applied with a surface load of 2mg / cm 2 Li-selenium disulfide batteries, through TiO 2 The chemisorption effect can effectively inhibit the generation of shuttle effect and the protective effect of covalent organic framework on lithium anode, so as to avoid the generation of lithium dendrites, and effectively improve the cycle stability of the battery and the specific capacity of the battery.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a double-coated diaphragm applied to a lithium-selenium disulfide battery and a preparation method and application thereof. Background technique [0002] The global environmental pollution and energy crisis are becoming more and more serious, and the resulting huge environmental pollution and greenhouse effect are becoming more and more prominent. Human beings urgently need to develop new green and renewable energy to replace the current energy supply system. These include: developing and designing more environmentally friendly electric and hybrid vehicles, achieving CO 2 Zero or small emissions; vigorously develop new renewable energy sources, such as wind energy, solar energy and tidal energy and other forms of energy applications. The development of these fields requires efficient energy storage systems. Lithium-ion secondary batteries have many advantages s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M50/449H01M50/403H01M50/411H01M10/052
CPCH01M10/052H01M50/403H01M50/446Y02E60/10
Inventor 蔡跃鹏李国辉胡润泽洪旭佳杨焱
Owner SOUTH CHINA NORMAL UNIVERSITY
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