Accession Number : ADD013756

Title :   Improved Alkaline Earth-Oxyhalide Electrochemical Cell for Low Temperature Use.

Descriptive Note : Patent Application, Filed 20 May 88,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Binder, Michael ; Walker, Charles W , Jr

Report Date : 20 May 1988

Pagination or Media Count : 8

Abstract : This invention relates in general to an alkaline earth-oxyhalide electrochemical cell and in particular, to an improved alkaline earth oxyhalide electrochemical cell for low temperature use. A typical cell includes a calcium anode, 1M Ca(AlCl4)2 thionyl chloride/75 percent Shawinigan - 25 percent acetone washed Black Pearls 2000 carbon black cathode. The improvement to this cell involves the addition of 10 volume percent bromine to the electrolyte. During discharge at about -30 C, cathode potential is raised by about 0.5 volt providing a cell voltage well above the 2.0 volt minimum which is a standard military specification. Without bromine, cell capacity is about one minute. With the addition of bromine, load voltage is initially 2.5 volts, then slowly decreases to 2.0 volts over about twelve minutes.

Descriptors :   *PATENT APPLICATIONS, *ELECTROLYTIC CELLS, ACETONES, ADDITION, ANODES, BROMINE, CALCIUM, CAPACITY(QUANTITY), CATHODES, ELECTROCHEMISTRY, ELECTROLYTES, LOW TEMPERATURE, MILITARY REQUIREMENTS, SPECIFICATIONS, VOLTAGE

Subject Categories : Electrochemical Energy Storage

Distribution Statement : APPROVED FOR PUBLIC RELEASE