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Quasi-solid polymer water solution system electrolyte film and its preparing method

An electrolyte membrane and polymer technology, applied in secondary battery parts and other directions, can solve problems such as low water content, reduce shedding, reduce battery leakage, and increase battery life.

Inactive Publication Date: 2005-08-03
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there is no report of a real all-solid electrolyte for alkaline batteries. The existing reports are all relatively solid electrolytes, but the water content is relatively small.

Method used

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  • Quasi-solid polymer water solution system electrolyte film and its preparing method
  • Quasi-solid polymer water solution system electrolyte film and its preparing method

Examples

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Effect test

Embodiment 1

[0025] Weigh 0.6 g of water-absorbing resin polyacrylic acid cross-linked polymer (such as Carbopol 740B resin, Noveon, INC) according to 3% of the total amount of water (20 g), and slowly sieve it into rapidly stirring water until Carbopol is completely swollen to form a hydrosol . Then slowly add 10g of polystyrene acrylic emulsion to the above gel, stir to form a white cream, after fully emulsified, add 3ml of acetone or ethanol to eliminate air bubbles, then quickly apply the cream to a film coating machine, dry, The result is a homogeneous polymer film that can be stored and transported like conventional separators. When the membrane is in use, immerse the membrane together with the positive and negative electrodes of the battery (such as nickel hydroxide positive electrode, hydrogen storage alloy negative electrode) in 5-10N potassium hydroxide solution for 5-20 hours, take out the trapped dry lye, and put it into vacuum drying Dry it in the box for 2 hours, and add 0.5...

Embodiment 2

[0028] Weigh cellulose and acrylic acid cross-linked polymer water-absorbent resin according to 5% of the total amount of 6N potassium hydroxide aqueous solution (20g), and slowly sieve it into the above-mentioned 6N potassium hydroxide aqueous solution which is stirred rapidly, until the polymer is completely swollen and forms a gel. glue. Then slowly add polystyrene acrylic emulsion of 30% gel weight to the above gel to emulsify to form a white cream. After fully emulsified, quickly apply the cream on glass or other substrates with a smooth surface, and dry it in vacuum for 2 hours. , In this way, the quasi-solid polymer aqueous solution system electrolyte membrane for alkaline batteries described in the present invention has been prepared.

Embodiment 3

[0030] Under ultrasonication, add 0.054g nano Y2O3 into 20g 6N potassium hydroxide aqueous solution, and continue ultrasonication for 15 minutes to fully disperse Y2O3. Weigh cross-linked polyacrylate water-absorbent resin and 1.0% PVA water-absorbent resin with lye content of 3.0%, and slowly sieve the above two water-absorbent resins into the above-mentioned 6N potassium hydroxide aqueous solution which is stirred rapidly, until the polymer is completely swollen and forms a gel glue. Then slowly add 30% polymethyl acrylate emulsion of the gel weight to the above gel to emulsify to form a white cream. After fully emulsifying, quickly apply the cream on a glass or other substrate with a smooth surface, and dry it in vacuum for 2 hours. In this way, the electrolyte membrane of the quasi-solid polymer aqueous solution system for the alkaline battery described in the present invention is prepared.

[0031] composition

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Abstract

The present invention relates to a kind of quasi-solid polymer aqua system electrolyte film unlike that in lithium ion cell and its preparation process. The quasi-solid polymer aqua system electrolyte film is specially for water solution electrolyte energy conversion system. Two or more kinds of polymer material and additive are prepared into solid polymer electrolyte film through emulsification, film coating, drying and other steps, and there are at least a kind of polymer material without swelling in alkali aqua and at least a kind of strong hydroscopic resin. The solid polymer electrolyte film has the advantages of powerful electrolyte liquid maintaining capacity, high conductivity, high stability, etc. and can raise the circulating service life of cell and capacity, lower self discharge, avoid liquid leakage and simplify technological process.

Description

technical field [0001] The invention relates to an electrolyte membrane, in particular to an electrolyte membrane of a quasi-solid polymer aqueous solution system and a preparation method thereof, and belongs to the field of new green energy materials. Background technique [0002] The ionic conduction behavior in inorganic salt crystals has been recognized by people as early as the end of the 19th century. It was not until 1913 that α-AgI crystals were found to have very large ionic conductivity that solid electrolytes really received attention. Wright discovered in the 1970s that polyethylene oxide (PEO) and inorganic salts can form complexes with high ion conductivity, which can dissolve supporting electrolytes like liquids in a solid state and can undergo ion migration. Polymer materials are called solid polymer electrolyte (SPE for short), polymer solid ion conductor (polymeric solidionic conductor), polymer fast ion conductor (polymeric fast ionic conductor), and ion-c...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L23/06C08L23/12C08L25/14C08L27/18H01M10/02
CPCY02E60/10
Inventor 吴峰毛立彩陈实王国庆苏岳峰杨凯陈人杰王芳
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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