Diaphragm of alkali zinc-manganese battery and process for preparing same

A zinc-manganese battery and preparation process technology, applied in battery pack parts, circuits, electrical components, etc., can solve the problems of unstable performance, poor alkali resistance, low liquid absorption rate, etc., and achieve good isolation ability, good ion The effect of electrical conductivity

Active Publication Date: 2010-06-09
HENAN KEGAO RADIATION CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide an alkaline zinc-manganese battery diaphragm and its preparation process, to overcome the shortcomings of the diaphragm in the prior art, such as poor alkali resistance, unstable performance or low liquid absorption rate.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The mass percentage of preparation is composed of sodium carboxymethylcellulose 3%, acrylic acid 8.0%, sodium alkylbenzene sulfonate 0.5%, water 88.5% ethylenic monomer aqueous solution as grafting liquid; Utilize coating process to make ethylenic monomer The aqueous solution is evenly coated on the surface density of 35g m -2 On the ES fiber non-woven fabric with a fineness of 1.0 denier, the amount of adsorbed grafting liquid is 285% of the weight of the substrate; then it is continuously irradiated by an electron beam radiation device with a dose of 80.0kGy to make it grafted Copolymerization; then wash with water at 85°C to remove homopolymer and unreacted monomers, and finally dry at 100°C to remove water, and then make a hydrophilic ES fiber nonwoven fabric with a grafting rate of 15.1%. battery separator. Tested by the conventional finishing process, the thickness of the diaphragm is 0.10mm, the liquid absorption is 402%, and the alkali boiling loss is 0.5%.

Embodiment 2

[0032] The mass percentage of the preparation is composed of polyacrylamide 0.4%, polyoxyethylene 0.1%, acrylic acid 12.0%, alkylbenzene sulfonate sodium 1.5%, water 86.0% vinyl monomer aqueous solution as grafting liquid; use coating process to make vinyl The monomer-like aqueous solution is uniformly coated on the surface density of 40g m -2 , fineness of 1.0 denier vinylon non-woven fabric substrate, the amount of adsorption grafting liquid is 320% of the weight of the substrate; then it is continuously irradiated by an electron beam radiation device with a dose of 40.0kGy to make it Graft copolymerization; then wash with water at 90°C to remove homopolymer and unreacted monomers, and finally dry at 100°C to remove water, and then make a hydrophilic vinylon nonwoven fabric with a grafting rate of 26.3%. Cloth alkaline battery separator. According to the conventional post-finishing process test, the thickness of the diaphragm is 0.12mm, the liquid absorption is 418%, and th...

Embodiment 3

[0034] Prepare an aqueous vinyl monomer solution composed of 1% polyvinyl alcohol, 30.0% acrylic acid, 1.0% alkyl alcohol polyoxyethylene ether, and 68.0% water as a grafting liquid; use a coating process to make the vinyl monomer aqueous solution uniform Coating on surface density of 40g·m -2 , fineness 1.0 denier vinylon, fineness 1.0 denier ES fiber and the wet-laid nonwoven base material of alkali-resistant paper pulp, the amount of adsorption grafting liquid is 180% of base cloth weight; The 20.0kGy electron beam radiation device is irradiated to make it undergo graft copolymerization; then it is washed with water at 85°C to remove homopolymer and unreacted monomer, and finally dried at 95°C to remove water. A hydrophilic nonwoven alkaline battery separator with a grafting rate of 32.3%. According to the conventional post-finishing process test, the thickness of the diaphragm is 0.12mm, the liquid absorption is 529%, and the alkali boiling loss is 1.1%.

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Abstract

The invention belongs to the technical field of alkali battery diaphragms, in particular to a diaphragm of an alkali zinc-manganese battery and a process for preparing the same. The diaphragm adopts a double-layer compound structure formed by an alkali resistant non woven fabric porous liquid storage layer and a polysnion gel electrolyte isolation layer, wherein the liquid storage layer and the isolation layer are bonded by the crosslinking between graft polymer molecules or polymer molecules. Under a condition of keeping good ionic conduction performance possessed by the diaphragm of the common alkaline manganese battery, the novel diaphragm of the alkali zinc-manganese battery has better isolation performance, good alkali resistance, higher liquid absorbing ability, and better storing stability.

Description

(1) Technical field [0001] The invention belongs to the technical field of alkaline battery separators, in particular to an alkaline zinc-manganese battery separator and a preparation process thereof. (2) Background technology [0002] Alkaline zinc-manganese batteries use high-concentration potassium hydroxide aqueous solution as the electrolyte, requiring alkaline zinc-manganese battery separators to have good hydrophilicity and chemical stability (including alkali stability and redox stability), so conventional alkali Separators for zinc-manganese batteries are usually made of fibers with good hydrophilicity and chemical stability, such as Pooh fibers, nylon fibers, and polypropylene fibers treated with hydrophilicity. Good isolation performance and ion conductivity are two basic functions of battery separators. The smaller the pore size, the better the isolation performance of the diaphragm; the higher the porosity, the better the liquid storage performance of the diaph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16H01M50/403H01M50/454H01M50/489H01M50/497
CPCY02E60/12Y02E60/10
Inventor 崔国士赵红英党从军董海杰
Owner HENAN KEGAO RADIATION CHEM TECH
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