Aramid pulp, preparation method thereof, and separator based on the aramid pulp

A slurry and aramid fiber technology, applied in the field of diaphragm based on the aramid fiber slurry, aramid fiber slurry and its preparation method, can solve the problems of difficult extraction waste liquid treatment, high resource cost, and environmental pollution

Active Publication Date: 2021-10-15
HEBEI GELLEC NEW ENERGY MATERIAL SCI&TECHNOLOY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When making aramid-coated diaphragms, the coating process needs to use a large amount of solvent extraction, which wastes resources at a high cost, and the extraction waste liquid is difficult to deal with and pollutes the environment. It is now necessary to invent an aramid slurry that can be directly extracted with water. It is necessary to save cost and ensure the good performance of aramid coating film

Method used

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  • Aramid pulp, preparation method thereof, and separator based on the aramid pulp
  • Aramid pulp, preparation method thereof, and separator based on the aramid pulp
  • Aramid pulp, preparation method thereof, and separator based on the aramid pulp

Examples

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Comparison scheme
Effect test

Embodiment 1

[0037] A preparation method for aramid pulp, comprising the following steps:

[0038] 1) preparing the first solution and the second solution, wherein,

[0039] The preparation method of the first solution is as follows: dissolve the chloride salt in dimethylacetamide, then add meta-aramid fibers to obtain the first base material, seal the first base material in the stirring tank, and insert it into the clamp of the stirring tank Put hot water at 80°C into the sleeve, and stir at 80°C for 10 hours to dissolve the meta-aramid fiber in dimethylacetamide to obtain the first solution, wherein the stirring speed is 35r / min, calculated by mass fraction , chlorine salt is 2wt% of the first base material, dimethylacetamide is 78wt% of the first base material, meta-aramid fiber is 20wt% of the first base material, and chloride salt is lithium chloride;

[0040] The preparation method of the second solution is as follows: put the alumina and tripropylene glycol into the mixing tank aft...

Embodiment 2

[0043] A preparation method for aramid pulp, comprising the following steps:

[0044] 1) preparing the first solution and the second solution, wherein,

[0045] The preparation method of the first solution is as follows: dissolve the chloride salt in dimethylacetamide, then add meta-aramid fibers to obtain the first base material, seal the first base material in the stirring tank, and insert it into the clamp of the stirring tank Put hot water at 80°C into the sleeve, and stir at 80°C for 10 hours to dissolve the meta-aramid fibers in dimethylacetamide to obtain the first solution, wherein the stirring speed is 35r / min, calculated by mass fraction , chlorine salt is 8wt% of the first base material, dimethylacetamide is 72wt% of the first base material, meta-aramid fiber is 20wt% of the first base material, and chloride salt is lithium chloride;

[0046] The preparation method of the second solution is as follows: put the alumina and tripropylene glycol into the mixing tank af...

Embodiment 3

[0049] A preparation method for aramid pulp, comprising the following steps:

[0050] 1) preparing the first solution and the second solution, wherein,

[0051]The preparation method of the first solution is as follows: dissolve the chloride salt in dimethylacetamide, then add meta-aramid fibers to obtain the first base material, seal the first base material in the stirring tank, and insert it into the clamp of the stirring tank Put hot water at 80°C into the sleeve, and stir at 80°C for 10 hours to dissolve the meta-aramid fiber in dimethylacetamide to obtain the first solution, wherein the stirring speed is 35r / min, calculated by mass fraction , chlorine salt is 3wt% of the first base material, dimethylacetamide is 75wt% of the first base material, meta-aramid fiber is 22wt% of the first base material, and chloride salt is lithium chloride;

[0052] The preparation method of the second solution is as follows: put the alumina and tripropylene glycol into the mixing tank afte...

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Abstract

The invention discloses an aramid fiber slurry, a preparation method thereof, and a diaphragm based on the aramid fiber slurry. The preparation method of the aramid fiber slurry includes the following steps: preparing a first solution and a second solution, and dissolving the first solution Mix with dimethylacetamide, stir until uniform, add water, stir until uniform, add isopropanol, stir until uniform, then add dimethyl carbonate, stir until uniform, add the second solution, stir until uniform, Obtain the aramid fiber slurry, the aramid fiber slurry of the present invention contains alcohol, water and ester, adjust the ratio of three kinds of non-solvents (alcohol, water and ester) creatively, let alcohol, water and ester three kinds of non-solvents jointly Under the action, it occupies the position of the aramid fiber slurry, and after the aramid fiber is solidified with pure water, the non-solvent is evenly dissolved into the water, which has an extraction effect and makes the aramid fiber evenly form pores.

Description

technical field [0001] The invention belongs to the technical field of battery diaphragms, and in particular relates to an aramid pulp, a preparation method thereof, and a diaphragm based on the aramid pulp. Background technique [0002] The composition of lithium-ion batteries includes positive electrodes, negative electrodes, separators and electrolytes. As one of the four major materials of lithium-ion batteries, the separator is a key inner layer component in lithium batteries, although it does not participate in the electrochemical reactions in the battery. [0003] Aramid-coated separators have the advantages of good high temperature resistance, high energy density, excellent wettability, and long service life, and have attracted widespread attention from industry professionals. When making aramid-coated diaphragms, the coating process needs to use a large amount of solvent extraction, which wastes resources at a high cost, and the extraction waste liquid is difficult ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M50/403H01M50/44H01M50/446H01M50/451C08J7/04C09D177/10C08L23/06
CPCC08J2323/06C08J2477/10C09D177/10H01M50/403H01M50/411H01M50/44Y02E60/10
Inventor 袁海朝徐锋李腾苏碧海
Owner HEBEI GELLEC NEW ENERGY MATERIAL SCI&TECHNOLOY CO LTD
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