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A kind of preparation method of alkaline zinc-manganese battery diaphragm based on nanocellulose

A nanocellulose, zinc-manganese battery technology, applied in primary batteries, battery pack components, circuits, etc., can solve the problems of inability to obtain higher porosity battery separators, preparation of alkaline-manganese battery separators, etc., and achieve easy operation and convenience. Preparation, low pore size effect

Active Publication Date: 2018-07-24
HENAN KEGAO RADIATION CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Nowadays, with the development of alkaline manganese batteries, in order to obtain better liquid storage performance, isolation performance and lower resistance to prepare alkaline manganese batteries with higher capacity and power, the battery separator of alkaline manganese batteries is required to have Higher porosity, lower pore size and thinner thickness are also the inevitable direction for the development of battery separators; The only way, and traditionally the thinnest fiber for preparing alkaline manganese battery separator is 0.5dtex vinylon fiber, but based on the requirements of the liquid absorption performance of the battery separator, it is still not possible to use vinylon fiber to prepare the alkaline manganese battery separator at present, so it is As a result, people cannot obtain battery separators with higher porosity, lower pore size and thinner thickness for the time being

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] Example 1: The mass fraction of dry-based nanocellulose in the separator in the used nanocellulose aqueous dispersion is 5.0%; the fiber fineness of the vinylon fiber used is 1.65 dtex, the length is 6 mm, and it is in the separator. The mass fraction is 50%; the dissolving temperature of the water-soluble vinylon fiber is 80℃, the fiber fineness is 1.0dtex, the length is 3mm, and its mass fraction in the diaphragm is 5%; the natural cellulose fiber used is Softwood pulp, its mass fraction in the diaphragm is 40%; the above raw materials are made by wet non-woven technology with an areal density of 35±1.0g / m 2 , And after hot rolling finishing and shaping to a thickness of 100±10μm alkaline zinc manganese battery separator;

example 2

[0018] Example 2: The mass fraction of dry-based nanocellulose in the diaphragm in the used nanocellulose aqueous dispersion is 20%; the fiber fineness of the vinylon fiber used is 1.1 dtex, the length is 5 mm, and it is in the diaphragm. The mass fraction is 43%; the dissolution temperature of the water-soluble vinylon fiber used is 90℃, the fiber fineness is 1.5dtex, the length is 6mm, and its mass fraction in the diaphragm is 7%; the natural cellulose fiber used is Viscose fiber, its fiber fineness is 1.1dtex, length is 5mm, and its mass fraction in the diaphragm is 30%; the above raw materials are made into an areal density of 30±1.0g / m using wet non-woven technology 2 , And after hot rolling finishing and shaping to a thickness of 80±10μm alkaline zinc manganese battery separator;

example 3

[0019] Example 3: The mass fraction of dry-based nanocellulose in the separator in the used nanocellulose aqueous dispersion is 30%; the fiber fineness of the vinylon fiber used is 0.55dtex, the length is 3mm, and its content in the separator The mass fraction is 40%; the dissolution temperature of the water-soluble vinylon fiber used is 100℃, the fiber fineness is 2.0dtex, the length is 8mm, and its mass fraction in the diaphragm is 10%; the natural cellulose fiber used is Tencel fiber, the fiber fineness is 1.1dtex, the length is 3mm, and its mass fraction in the diaphragm is 20%; the above-mentioned raw materials are made into an areal density of 25±1.0g / m using wet non-woven technology 2 , And after hot rolling finishing and shaping to a thickness of 60±10μm alkaline zinc manganese battery separator.

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Abstract

The invention relates to a fabrication method of an alkaline zinc-manganese battery separator. According to the method, a nanocellulose aqueous dispersion liquid, vinylon fiber, water-soluble vinylon fiber and cellulose fiber are used as raw materials, and the battery separator is prepared by a wet non-woven fabric technology. By the method, the alkaline zinc-manganese battery separator with higher porosity, lower aperture and thinner thickness can be effectively prepared.

Description

【Technical Field】 [0001] The invention relates to the field of battery diaphragm preparation, in particular to a preparation method for preparing alkaline zinc manganese battery diaphragm by using nano cellulose. 【Background technique】 [0002] As is well known, alkaline zinc-manganese battery is abbreviated as alkaline manganese battery or alkaline battery. It uses a high-concentration potassium hydroxide aqueous solution as the electrolyte and requires the battery separator to have good hydrophilicity and chemical stability. At the same time, it also requires The battery separator should have good isolation performance and ion conductivity, that is, the smaller the pore size of the battery separator, the higher the porosity, the better the isolation performance, the better the storage performance and the ion conductivity, and therefore the conventional alkaline zinc The battery separator of a manganese battery is usually made of fiber materials with good hydrophilicity and chem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/14H01M2/16H01M6/00
CPCH01M6/00H01M50/403H01M50/44
Inventor 崔国士崔攀马翔赵红英
Owner HENAN KEGAO RADIATION CHEM TECH