Solid state cell manufacture

Details Solid state cell manufacture Solid state cell manufacture

1984-10-09

1986-12-30

Pianalto, Bernard D.

Metal working

Method of mechanical manufacture

Electrical device making

427 58, 4273935, H01M 404

Patent

active

046318100

ABSTRACT:
A unitary polymer electrolyte/polymer-based cathode film component for use in a solid state electrochemical cell is manufactured by solution casting onto one of the electrolyte or cathode, a solution of the other of the electrolyte or cathode.
The solution is prepared at elevated temperature (e.g. 40.degree.-50.degree. C.) and cooled to a lower temperature, e.g. ambient, before carrying out the casting. The solvent (e.g. methanol) is such that the polymer (e.g. poly (ethylene oxide)) is only sparingly soluble therein at the lower temperature and relatively readily soluble therein at the elevated temperature. Also, immediate precipitation of the polymer does not occur on cooling the solution from the elevated temperature to the lower temperature. In this way, dissolution of said one of the electrolyte or cathode is avoided.

REFERENCES:
patent: 4242412 (1980-12-01), Funaki et al.
patent: 4303748 (1981-12-01), Armand et al.
General Chemistry, Markham et al. pp. 77-78.

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