The Electrocatalysis of Oxyhalide Reduction by Dissolved Halogens in Lithium Anode Cells

Abstract

Molecular iodine has been found to be a powerful catalyst for the electroreduction of thionyl chloride in lithium anode cells. The I2 and SOC12 apparently function as a redox electrode, the SOC12 serving as a chemical regenerant for the molecular iodine which is reduced at the porous carbon cathode. Similar behavior is observed with Br2 in SQC12-based electro~ lytes. Because solid products form via chemical steps occurring subsequent to the electroreduction of the halogen, they tend not to block the cathode surface sites which remain active for the continued reduction of the chemically regenerated halogen.) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 150.135.239.97 Downloaded on 2015-05-27 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 150.135.239.97 Downloaded on 2015-05-27 to IP ABSTRACTA rigorous technique of analyzing impedance data for systems which have convective Warburg impedance elements in them has been developed. In particular, a rotating disk electrode system was analyzed, by solving the applicable transient convective diffusion equation numerically. The numerical solution was used to find nonlinear least squares parameters to fit an impedance data set, over the entire frequency range. In this manner the diffusion coefficient and other physical parameters of the system were determined without any assumption about electrode area, solution concentration, or kinetics. The shortcomings of the conventional techniques to evaluate physical parameters from impedance data have been overcome.) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 150.135.239.97 Downloaded on 2015-05-27 to IP