Ultra-thin button-type primary electrochemical cell

Details Ultra-thin button-type primary electrochemical cell Ultra-thin button-type primary electrochemical cell

1977-09-19

1978-10-17

Lefevour, Charles F.

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Flat-type unit cell and specific unit cell components

429174, 429185, 429196, H01M 612

Patent

active

041210204

ABSTRACT:
An unconventionally thin button-type primary electrochemical cell is described in which a pair of shallow, opposed, dished cover members formed of a conductive metallic material are positioned with an electrically insulating sealing gasket therebetween so that the respective cover members may act as terminals of the primary electrochemical cell. A thin preformed porous carbon cathode disc is fitted within and in mechanical and electrical contact with the inner surface of one of the cover members and a thin alkali metal anode disk is fitted within and in mechanical and electrical contact with the inner surface of the other of the cover members. A thin porous separator of electrically nonconductive material is interposed between the anode and the cathode. A quantity of an electrolyte solution comprising a solute dissolved in an inorganic oxyhalide or thiohalide solvent is diffused throughout the porous carbon cathode and the porous separator. The cathode is formed with a binding agent which decreases cathode rigidity and thereby enables the cathode to absorb the flexing to which an ultra-thin cell is subjected.

REFERENCES:
patent: 3413239 (1968-11-01), Olstowski et al.
patent: 3551205 (1970-12-01), Fraioli et al.
patent: 3853627 (1974-12-01), Lehmann
patent: 3891457 (1975-06-01), Auborn
patent: 3891458 (1975-06-01), Eisenberg
patent: 3920478 (1975-11-01), Kozawa

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