Accession Number : AD0260629

Title :   THE TESTING OF HERMETIC SEALS AND SEPARATORS, POSITIVE PLATE STUDIES, AND INVESTIGATIONS ON THE UNIFORMITY OF SEALED NICKEL-CADMIUM CELLS

Corporate Author : GULTON INDUSTRIES INC METUCHEN N J

Personal Author(s) : SEIGER,H.N.

Report Date : 31 MAR 1961

Pagination or Media Count : 1

Abstract : Ceramic-to-metal seals are now produced consistently. Accelerated testing of separator materials was completed, and the properties of separators are reviewed. Overcharge data were obtained on 6 cells. The data consists of the capacity, Tafel slope and pressure slope. Several cell with a ratio of negative to positive capacity near unity, were brought into several different states of charge. These cells were t en pressured with oxygen and the pressure decrease obtained. The question of oxygen adding capacity to a cell was investigated, and a negative answer obtained. The oxygen evolution data was analyzed on a phenomenological basis. The theory of the analysis was developed. It appears that pure nickel has 2 sources of oxygen which have half-times of 9 and 102 minutes respectively. A third sel -discharge process is also occurring, but no data has been obtained on this. the doped electrodes have 2 self-discharge processes which are suspected of being one oxygen source undergoing sequential decay. The potential decay data is reported as t e Tafel slopes. (Author)

Descriptors :   *ALKALINE BATTERIES, *ANODES (ELECTROLYTIC CELL), *BATTERY SEPARATORS, *SEALS (STOPPERS), *STORAGE BATTERIES, CADMIUM, CERAMIC MATERIALS, DESIGN, ELECTRODES, METAL SEALS, NICKEL, TEST METHODS

Distribution Statement : APPROVED FOR PUBLIC RELEASE