Accession Number:

AD0600395

Title:

DEVELOPMENT OF THE SEALED ZINC-SILVER OXIDE SECONDARY BATTERY SYSTEM.

Descriptive Note:

Quarterly progress rept. no. 2, 1 Oct-30 Dec 63,

Corporate Author:

YARDNEY LABS INC NEW YORK

Personal Author(s):

Report Date:

1963-12-30

Pagination or Media Count:

83.0

Abstract:

12AH sealed silver-zinc cells of standard construction when cycled at 120 F had poor capacity maintenance, due to separator deterioration. Cells cycled at room temperature showed poor charge acceptance at high rates of charge. Studies of the reaction of oxygen with zinc in 12AH cells indicate that the maximum overcharge rate possible with standard construction is 60-90ma or 1.2-1.8 masq. in. The recombination reaction was found to be limited by the diffusion of oxygen through the electrolye. In the range of concentrations tested, 26.5-44 KOH, the lower the concentration the greater the rate of recombination. Data are presented on the physical, chemical and electrical properties of separators and interseparators. The use of one layer of high resistance membrane as a separator is not feasible. Most of the cells built with a single turn of Radiation Application, Inc. irradiated polyethylene shorted during the first charge. Positive electrode surface areas were studied by double layer capacitance. The result indicated that the area increase takes place during discharge. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE