ZINC-CHLORINE BATTERY - HALF-CELL OVERPOTENTIAL MEASUREMENTS

The voltaic performance of the zinc-chlorine battery was investigated by measuring the individual potentials of the Zn and Cl2 electrodes versus a reference electrode. The overpotential at the Zn electrode is very small for both the charging and the discharging processes, and the use of a flow-through porous Cl2 electrode is advantageous. Energy efficiency in the region of 65% has been achieved for a complete cycle. Tafel polarization data for both the zinc and the Cl2/graphite electrodes was obtained using rotating zinc hemisphere and graphite disc electrodes. Exchange current densities and Tafel slopes are reported. © 1979 Chapman and Hall Ltd.