Accession Number : AD0426952

Title :   FLOW-THROUGH POROUS ELECTRODES FOR REDOX COUPLES,

Corporate Author : HARRY DIAMOND LABS WASHINGTON D C

Personal Author(s) : Singman,David ; Bond,A.P.

Report Date : 04 OCT 1963

Pagination or Media Count : 34

Abstract : Investigation of the electrochemical behavior of the Ti() - TiO() and Br2 - Br(-) couples was continued with polarization meas urements at porous flow-through electrodes. Porous carbon was found to be an effective elec trode material. Carbons with an average pore diameter of 0.001 to 0.002 in. were superior in performance to those with larger pores. In corporation of a small amount of platinum or iridium metal in the porous carbon resulted in a marked decrease in electrode polarization. Samples of porous tantalum and titanium were con siderably inferior to carbon in electrode be havior, while porous platinum gave excellent results. Complete cells were constructed and evaluated with results very close to those ex pected on the basis of single-electrode measurements. (Author)

Descriptors :   (*FUEL CELLS, ELECTRODES), (*ELECTRODES, POROSITY), (*POLARIZATION, FUEL CELLS), POROUS MATERIALS, CARBON, PLAT, TANTALUM, TITANIUM, BROMINE, TITANIUM, OXIDES, IONS, CATALYSTS, IRIDIUM, ELECTRIC POTENTIAL, IONS, OXID4ION-REDUCTION, ANODES, CATHODES, ELECTROCHEMISTRY, ELECTROLYTIC CELLS.

Distribution Statement : APPROVED FOR PUBLIC RELEASE