Cell separator and cell
AssigneesJapan Atomic Energy Research Inst., Yuasa Battery Co., Ltd.
InventorsSueo Machi, Isao Ishigaki, Takanobu Sugo, Toshio Okada, Kazuo Murata, Shiro Tanso, Keizi Senoo
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Abstract
There is disclosed a novel cell separator made of a grafted membrane comprising a polyethylene film which is graft-copolymerized with a monomer having an ion exchange group, characterized in that said membrane has an area which is not grafted at all or an area of low degree grafting. By making use of this membrane, a small size and thin cell having excellent performance as well as satisfactory mechanical strength can be produced at low cost with great advantages.
Claims3
A cell separator made of a grafted membrane comprising a polyethylene film which is graft-copolymerized with a monomer having an ion exchange group, said grafted membrane having an area which is not grafted at all or an area of low degree of grafting.
Dependencies are inferred from the claim text.