Metal working – Method of mechanical manufacture – Electrical device making
Patent
1993-03-31
1993-12-28
Skapars, Anthony
Metal working
Method of mechanical manufacture
Electrical device making
205 63, H01M 416
Patent
active
052735540
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.
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AT&T Bell Laboratories
Schneider Bruce S.
Skapars Anthony
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