Batteries and materials useful therein

Details Batteries and materials useful therein Batteries and materials useful therein

1995-03-24

1997-08-26

Skapars, Anthony

Metal working

Method of mechanical manufacture

Electrical device making

205 63, H01M 416

Patent

active

056606001

ABSTRACT:
Batteries based on lead chemistry, e.g., lead-acid batteries, are substantially improved through the use of a particular positive material. This material is formed by the electrochemical conversion of tetrabasic lead sulfate (TTB) where this TTB is synthesized at a pH in the range 9.3 to 12 and under reaction conditions that provide a substantial excess of sulfate to the reactive lead. The resulting materials provide needle-like structures with a width generally in the range 3 to 1 .mu.m. The relative narrow needles, when employed on the positive electrode of a lead acid battery, improve the efficiency of formation, provide good adhesive to the positive plate, extend battery life, as well as, yield excellent capacity per gram of active material.

REFERENCES:
patent: 1944065 (1934-01-01), Chamberlain
patent: 3607408 (1971-09-01), Duddy
patent: 3765943 (1973-10-01), Biagetti
patent: 4081899 (1978-04-01), Thornton
patent: 5149606 (1992-09-01), Bullock et al.

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