Electrochemical cell having battery separator of ethylene-vinyl alcohol copolymer
OwnerRichard F. Stockelinventor
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Abstract
There is disclosed a battery with a separator of ethylene-vinyl alcohol copolymer. Inert filler and plasticizer can be used. The separator can be used in acid or alkaline electrolyte.
Claims5
An electrochemical cell containing an aqueous electrolyte and a separator comprising a microporous sheet having a thickness of from about 5 to 50 mils. of a substantially linear copolymer consisting of ethylene-vinyl alcohol containing from about 40 wt. % to about 90 wt. % combined vinyl alcohol.
An electrochemical cell containing an aqueous electrolyte and a separator comprising a microporous sheet having a thickness of from about 5 to 50 mils. of a substantially linear copolymer consisting of ethylene-vinyl alcohol wherein the combined vinyl alcohol content is from about 20 wt. % to 90 wt. % and a filler, the amount of copolymer comprising from about 10 to 60 volume % of said sheet and the amount of filler comprising from about 10 to 60 volume % of said sheet.
An electrochemical cell containing an aqueous electrolyte and a separator comprising a microporous sheet having a thickness of from about 5 to 50 mils. of a substantially linear copolymer consisting of ethylene-vinyl alcohol wherein the combined vinyl alcohol content is from about 20 wt. % to 90 wt. % and a filler, the amount of copolymer comprising from about 10 to 60 volume % of said sheet and the amount of filler comprising from about 10 to 60 volume % of said sheet, said separator being prepared by forming a sheet containing a mixture of said copolymer, said filler and a plasticizer, and removing said plasticizer from said sheet.
Dependencies are inferred from the claim text.