Method of making polymer electrolyte electrochemical cells

Details Method of making polymer electrolyte electrochemical cells Method of making polymer electrolyte electrochemical cells

2005-02-08

2005-02-08

Chaney, Carol (Department: 1745)

Metal working

Method of mechanical manufacture

Electrical device making

C429S300000, C429S303000, C429S338000, C429S342000, C429S343000

Reexamination Certificate

active

06852138

ABSTRACT:
The invention relates to a method for the preparation of a polymer electrolyte electrochemical cell using an electrolyte precursor, said precursor comprising one or more solvents, one or more salts and a polymer which dissolves in the solvent at a first temperature (Tdissol) and which is capable of forming a gel on subsequent cooling following heating to a second temperature (Tgel). Tdissolbeing lower than Tgel, which method comprises: (a) heating the electrolyte precursor to Tdissol; (b) optionally cooling the electrolyte precursor, (c) incorporating the electrolyte precursor into the electrochemical cell; (d) heating the electrochemical cell to Tgel; (e) cooling the polymer electrochemical cell to ambient temperature to bring about gelling of the polymer electrolyte. Preferably the polymer is a homopolymer or copolymer from the group of monomers of vinyl fluoride, vinylidenefluoride, trifluoroethylene, tetrafluoroethylene and hexafluoropropylene.

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