Preparation of metallic cation conducting polymers based on ster

Details Preparation of metallic cation conducting polymers based on ster Preparation of metallic cation conducting polymers based on ster

1988-11-22

1989-11-21

Walton, Donald L.

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Include electrolyte chemically specified and method

252 622, H01M 1040

Patent

active

048822434

ABSTRACT:
The present invention relates to ion-conducting solvent-free polymeric systems characterized as being cationic single ion conductors. The solvent-free polymer electrolytes comprise a flexible polymer backbone to which is attached a metal salt, such as a lithium, sodium or potassium salt, of a sterically hindered phenol. The solid polymer electrolyte may be prepared either by (1) attaching the hindered phenol directly to a flexible polymeric backbone, followed by neutralization of the phenolic OH's or (2) reacting the hindered phenol with a polymer precursor which is then polymerized to form a flexible polymer having phenolic OH's which are subsequently neutralized. Preferably the hindered phenol-modified polymeric backbone contains a polyether segment. The ionic conductivity of these solvent-free polymer electrolytes has been measured to be in the range of 10.sup.-4 to 10.sup.-7 S cm.sup.-1 at room temperature.

REFERENCES:
patent: 4471037 (1984-09-01), Bannister
patent: 4556615 (1985-12-01), Bannister
patent: 4654279 (1987-03-01), Bauer et al.
patent: 4737422 (1988-04-01), Knight et al.
patent: 4798773 (1989-01-01), Yasukawa et al.

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