Accession Number : AD0772944

Title :   High Energy Sealed Nickel-Zinc Batteries.

Descriptive Note : Final annual rept. 1 Mar 72-1 Oct 73,

Corporate Author : ENERGY RESEARCH CORP BETHEL CONN

Personal Author(s) : Charkey,Allen

Report Date : NOV 1973

Pagination or Media Count : 46

Abstract : A sealed 7 Ah/6.5 volt nickel-zinc battery has been developed which is capable of 160-200 cycles of operation at approximately 60% depth of discharge at the C/4 rate. Initial energy density obtained was 28 Wh/lb at the C/4 discharge rate. The battery will deliver about 40% of its energy at -20F at the C/4 rate. With silver amalgam oxygen recombination electrodes the battery is capable of continuous overcharge at 0.5 amperes at a safe steady state pressure below 50 psi. Improved inorganic separators (ERC-2002) have been developed which are chemically inert in KOH, have a uniform pore size distribution and stop the occurrance of zinc dendrites. The primary cause of failure of the battery was found to be from the zinc electrode failure. (Modified author abstract)

Descriptors :   *Storage batteries, High energy, Zinc, Nickel, Reliability(Electronics)

Subject Categories : Electrochemical Energy Storage

Distribution Statement : APPROVED FOR PUBLIC RELEASE