Coatings for electrochemical electrodes and methods of making th

Details Coatings for electrochemical electrodes and methods of making th Coatings for electrochemical electrodes and methods of making th

1985-08-26

1986-11-25

Walton, Donald L.

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

429194, 429246, H01M 1036, H01M 436

Patent

active

046249028

ABSTRACT:
The present invention provides a coating for electrodes for use in electrochemical cells having an electrochemically active species and an electrolyte. The coating includes a selectively permeable material which allows for the diffusion of the active species through the coating during operation of the cell while providing a substantially impervious barrier to the electrolyte. Electrodes utilizing the coatings described herein may be used in primary and secondary cells over a wide range of operating temperatures to deliver better electrochemical performance even at room temperature. Methods of making the coating and an apparatus for performing these methods on a continuous basis are included in the present invention. A novel composition of matter also is contemplated containing lithium, silicon, fluorine prepared by exposing lithium metal to SiF.sub.4.

REFERENCES:
patent: 3993501 (1976-11-01), Kalnoki-Kis
patent: 4440836 (1984-04-01), Bailey

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