Accession Number : AD0671771

Title :   CRYSTALLOGRAPHIC CHANGES DURING OXIDATION (CHARGING) OF THE SILVER ELECTRODE. PART II. OXIDATION FOLLOWING FIVE CHARGE-DISCHARGE CYCLES AT A LOW RATE.

Descriptive Note : Interim rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Wales,C. P. ; Simon,A. C.

Report Date : 13 MAY 1968

Pagination or Media Count : 24

Abstract : The microstructures and morphology observed during the charge of a sintered Ag electrode that had received five slow charge-discharge cycles in 35% KOH solution differed considerably from those observed during the initial charge. The Ag particles in the discharge electrode with five prior cycles were larger and much more uniform in size than those in the unused electrode. The size of the voids between particles had also increased with cycling. After the electrodes were charged, the aggregates of AgO crystals were smaller in the cycled electrode and more widely spaced. Very little difference was noted in the forms of either Ag2O or AgO crystals in the two cases, but considerably less of either oxide was formed during the sixth charge. The electrode capacity had declined as a result of the gradual change in structure. (Author)

Descriptors :   (*ALKALINE BATTERIES, ELECTRODES), (*ELECTRODES, SILVER), (*SILVER, OXIDATION), SILVER COMPOUNDS, OXIDES, CRYSTALLOGRAPHY, MICROSTRUCTURE, ELECTRIC DISCHARGES

Subject Categories : Physical Chemistry
      Electrochemical Energy Storage

Distribution Statement : APPROVED FOR PUBLIC RELEASE