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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AI-Extracted Technical Summary

Problems solved by technology

[0005] At present, there is no report of a real all-solid electrolyte for alkaline batteries. The ...
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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.

Application Domain

Secondary cell details

Technology Topic

Solution systemHigh conductivity +14

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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

  • Experimental program(3)
  • Effect test(2)

Example Embodiment

[0024] Example 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 polystyrene acrylic emulsion to the above gel, stir to form a white cream, after fully emulsifying, add 3ml acetone or ethanol to eliminate air bubbles, then quickly coat the cream on a film coating machine, dry, The result is a homogeneous polymer film that can be stored and transported like conventional membranes. 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 in the box for 2 hours, and the positive and negative electrodes of the battery should be added with 0.5% to 15% of the water-absorbent resin as a binder during the production process.
[0026]The positive and negative electrodes of the battery are separated by the electrolyte membrane of the above-mentioned quasi-solid polymer aqueous solution system, which is wound into a pole plate group, which is put into the AA-type battery case without injecting electrolyte and sealing. Made of AA-type nickel-metal hydride batteries.

Example Embodiment

[0027] Example 2:
[0028] Weigh cellulose and acrylic acid cross-linked polymer water-absorbent resin by weighing 5% of the total amount of 6N potassium hydroxide aqueous solution (20g), and slowly sieve it into the rapidly stirring 6N potassium hydroxide aqueous solution until the polymer is completely swollen, forming a coagulation glue. Then slowly add 30% polystyrene acrylic emulsion by weight of the gel to the above gel to emulsify to form a white cream. After fully emulsifying, quickly apply the cream to glass or other substrates with smooth surface and vacuum dry for 2 hours. , thus preparing the electrolyte membrane of the quasi-solid polymer aqueous solution system for alkaline battery described in the present invention.

Example Embodiment

[0029] Example 3:
[0030] Under ultrasonic, add 0.054g of nano-Y2O3 into 20g of 6N potassium hydroxide aqueous solution, and continue to ultrasonic for 15 minutes to fully disperse Y2O3. Weigh 3.0% cross-linked polyacrylate water-absorbent resin and 1.0% PVA water-absorbent resin in lye amount, and slowly sieve the above-mentioned two water-absorbent resins into the above-mentioned 6N potassium hydroxide aqueous solution of rapid stirring until the polymer is completely swollen to form a coagulation. glue. Then slowly add 30% polymethyl acrylate emulsion by weight of the gel to the above gel to emulsify to form a white cream. After sufficient emulsification, quickly apply the cream on a glass or other substrate with a smooth surface, and vacuum dry for 2 hours. In this way, the electrolyte membrane of the quasi-solid polymer aqueous solution system for alkaline batteries described in the present invention is prepared.
[0031] composition

PUM

no PUM

Description & Claims & Application Information

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