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APPENDIX A THE ZINC-CHLORINE BATTERY: HALF-CELL OVERPOTENTIAL MEASUREMENTS Jacob Jorne, Jung Taek Kim,* and Dennis Kralik** Department of Chemical and Metallurgical Engineering Wayne State University Detroit, Michigan 48202 ABSTRACT The voltaic performance of the zinc-chlorine battery was investigated by measuring the individual potentials of the Zn and Cl electrodes vs. a reference electrode. The overpotential at the Zn electrode is very small for both the charging and the discharging, and the use of a flow-through porous Cl electrode is advantageous. Energy efficiency in the range of 65% has been achieved for a complete cycle. Tafel polarization data for both the zinc and the Cl^/graphite electrodes was obtained using rotating zinc hemisphere and graphite disk electrodes. Exchange current densities and Tafel slopes are reported. * ** Present address: Bell Laboratories, Murray Hill, N.J. 07974 Present address: Diamond Shamrock Company, Painesville, Ohio 44070PDF Image | Development of the Zinc-Chlorine Battery for Utility
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