Film for a separator of electrochemical apparatus, and production method and use thereof
AssigneeShowa Denko K.K.
InventorsMasataka Takeuchi, Shuichi Naijo, Takashi Ohkubo
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Abstract
This invention provides a film comprising a cross-linked polymer having an oxyalkylene group or a cross-linked polymer having an oxyalkylene group through a urethane bond, as a constituent component, a production method of the film, and an electrochemical apparatus using the film as a separator. The film for separator of an electrochemical apparatus can be easily and uniformly processed, can include an electrolytic solution, exhibits good film thickness and ensures excellent safety and reliability. The electrochemical apparatus is free of leakage of the solution.
Claims27
A film for a separator of an electrochemical apparatus comprising, as a constituent component, an acryloyl-based cross-linked or an alkyl-substituted acryloyl-based cross-linked polymer having an oxyalkylene group, said film having been formed by electromagnetic wave polymerization and said film having a uniform film thickness of from 1 to 30 .mu.m with a fluctuation of film thickness of within .+-.10%, an ion conductivity greater than 1.times.10.sup.-4 S/cm and a film strength sufficient to be a free-standing film.
A film for a separator of an electrochemical apparatus comprising, as a constituent component, an acryloyl-based cross-linked polymer having a urethane bond and an oxyalkylene group, said film having a uniform film thickness of from 1 to 30 .mu.m with a fluctuation of film thickness of within .+-.10% and an ion conductivity greater than 1.times.10.sup.-4 S/cm.
Dependencies are inferred from the claim text.