To provide a safe and reliable material for an electrolyte film having a high ionic conductivity and mechanical strength, and to provide the electrolyte film for lithium battery, comprising the material.
The material for the electrolyte film is obtained by using a homo- or copolymer of a halogen-substituted ethylenically unsaturated hydrocarbon monomer as a backbone polymer, and graft-copolymerizing a quaternary ammonium salt-type normal temperature-melting salt monomer having an ethylenically unsaturated group by an atom-transfer radical polymerization method. The molten ammonium salt group can also be introduced by graft-copolymerizing an ethylenically unsaturated monomer having the first reactive functional group and reacting a molten ammonium salt having the second reactive functional group with the first reactive functional group of the graft copolymer. The electrolyte film for the lithium ion battery can be produced by adding a proper amount of a lithium salt and optionally a nonpolymerizable quaternary ammonium salt-type molten salt to the formed graft copolymer, and forming the resultant mixture into the film.
MATSUURA TAKANORI
SADA TSUTOMU
| JP2000331693A | 2000-11-30 | |||
| JP2004509192A | 2004-03-25 | |||
| JP2004035869A | 2004-02-05 |
Kazuo Akaoka
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