Porous film type solvent-free polymer electrolyte filled...

Details Porous film type solvent-free polymer electrolyte filled... Porous film type solvent-free polymer electrolyte filled...

2005-02-26

2008-12-23

Kalafut, Stephen J. (Department: 1795)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Include electrolyte chemically specified and method

C429S316000, C429S317000

Reexamination Certificate

active

07468226

ABSTRACT:
A solvent-free polymer electrolyte and a secondary battery employing the electrolyte are provided. The electrolyte includes: a porous film, including a first polymer and a second oligomer, the first polymer being at least one selected from the group consisting of poly (vinylidene fluoride-co-hexafluoropropylene) copolymers, polyvinylidenefluorides, polymethylmethacrylates, polyacrylonitriles, polyethyleneoxides, and celluloses having a polyether chain, and the second oligomer being at least one selected from the group consisting of poly(ethylene oxide-co-ethylene carbonate) copolymers with at least one terminal groups substituted by a halogen atom and polyethyleneglycols with at least one terminal group substituted by a halogen atom. An electrolyte comprising the second oligomer and a lithium salt is present in the pores of the porous film.

REFERENCES:
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patent: 5001023 (1991-03-01), Cheshire et al.
patent: 5424150 (1995-06-01), Ohnishi
patent: 6949318 (2005-09-01), Choi et al.
patent: 2005/0196678 (2005-09-01), Yamamoto et al.
patent: 02-038451 (1990-02-01), None
patent: 2001-217010 (2001-08-01), None

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