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

[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.

[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.

[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