Accession Number:

AD0743017

Title:

Depths of Discharge for Accelerated Life Tests of Cadmium Electrodes.

Descriptive Note:

Special technical rept.,

Corporate Author:

BATTELLE COLUMBUS LABS OHIO

Personal Author(s):

• Reed,Allan H.
• McCallum,John

Report Date:

1972-05-01

Pagination or Media Count:

51.0

Abstract:

Physical and chemical changes that occur in cadmium electrodes have been studied as a function of their depth of discharge and number of cycles. The electrodes were examined after removal from cycling by metallographic techniques, by chemical analysis for cadmium and cadmium hydroxide, and by measurements of electrochemical capacity after cycling. The results show that greater losses of capacity occur at greater depths of discharge and after greater number of cycles. The losses of capacity appear to be related to structural changes in the cadmium deposits in the porous electrode. The results of the chemical analyses show that essentially all of the cadmium remains within the electrode during cycling except at extreme depths and numbers of cycles. Author

Descriptors:

• *ELECTRODES
• *STORAGE BATTERIES
• CADMIUM
• LIFE EXPECTANCY(SERVICE LIFE)
• ACCELERATED TESTING
• CHEMICAL ANALYSIS
• MICROSTRUCTURE

Subject Categories:

• Electrochemical Energy Storage

Distribution Statement:

APPROVED FOR PUBLIC RELEASE