High specific energy electrochemical cell with low initial imped

Details High specific energy electrochemical cell with low initial imped High specific energy electrochemical cell with low initial imped

1985-03-25

1986-04-08

Lefevour, Charles F.

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Include electrolyte chemically specified and method

429196, H01M 614

Patent

active

045813078

ABSTRACT:
A high specific energy electrochemical cell comprises: a negative active material (4) based on an alkali metal or on an alkaline-earth metal; a separator (8); a non-aqueous liquid electrolyte; and a positive electrode comprising a solid active mass (5). The positive mass is provided, on its electrolyte side, with a porous and electron conductive metal covering (12) which does not participate in the electrochemical reaction, whose thickness is of the order of a few microns, and which is in contact with the metal portions serving as a positive current collector. The covering greatly reduces the initial impedance of the cell.

REFERENCES:
patent: 4195123 (1980-03-01), Jumel
patent: 4223078 (1980-09-01), Armand et al.
patent: 4229509 (1980-10-01), Margalit
patent: 4268587 (1981-05-01), Farrington et al.
patent: 4333994 (1982-06-01), Urry

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