Accession Number : AD0282030

Title :   RESEARCH ON ORGANIC DEPOLARIZERS.

Descriptive Note : Quarterly progress rept. no. 3, 1 Jan-31 Mar 62,

Corporate Author : MONSANTO RESEARCH CORP EVERETT MASS

Personal Author(s) : Gruber ,B. A. ; McElhill,E. A.

Report Date : 31 MAR 1962

Pagination or Media Count : 43

Abstract : A new type half cell, Cell D, for testing soluble depolarizes was constructed and is being evaluated. It is designed to operate with a minimum of liquid electrolyte and has an ion-exchange membrane separator to confine the depolarizer to the cathode. Temperature change between 30 and 50 C had no effect on the half cell characteristics of m-dinitrobenzene indicating mass transfer by diffusion is probably the limiting factor in the reduction. Electrolytes made from salts of strong acids and strong bases gave lower capacities than those made from weak bases and strong acids such as ammonium bromide or magnesium perchlorate when used with m-dinitrobenzene. Electrolytic discharge of the oxygen normally found adsorbed on the carbon black before measuring the voltage-current relationship of a m-dinitrobenzene cathode lowered the open circuit potential to -0.1 volt (NHE); however, the electrode only polarized 0.2 volt at a current drain of 0.2 amp/g. Predischarging the oxygen adsorbed on a platinum catalyzed carbon black improved the m-dinitrobenzene potential by approximately 80 millivolts. In screening new organic compounds for depolarizer activity two promising materials were uncovered, namely, tetracyanoethylene and acetonitrolic acid. (Author)

Descriptors :   (*PRIMARY BATTERIES), (*POLARIZATION), (*ELECTROLYTIC CELLS), (*ORGANIC COMPOUNDS), DESIGN, CATHODES(ELECTROLYTIC CELL), ELECTRODES, MAGNESIUM, MAGNESIUM COMPOUNDS, BROMIDES, NITROBENZENES, ETHYLENES, CYANO RADICALS, OXIMES, NITRO RADICALS, ACETYL RADICALS

Distribution Statement : APPROVED FOR PUBLIC RELEASE