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The use of calcium metal as an anode in SOCl2 electrolytes was investigated. Calcium showed an open‐circuit potential (OCP) of 3.22V vs. a carbon cathode in 1MnormalCafalse(AlCl4)2‐SOCl2 electrolyte. Hermetically sealed D cells, when discharged at 1 mA/cm2, displayed level discharge plateaus of 2.8V. SEM photographs indicated the rapid formation of a crystalline layer on the anode; the composition of this film was established as CaCl2 . Storage of calcium samples in normalCafalse(AlCl4)2‐SOCl2 electrolyte resulted in corrosion of the metal. This corrosion was particularly pronounced at 55°C and it appeared to be a fundamental behavior which was not eliminated by rigid control of electrolyte purity. The following cell chemistry was suggested by chemical analysis of discharged electrolytes and cathodes2normalCa+2SOCl2→SO2+2CaCl2+SElectrodeposition experiments indicated no evidence for the plating of Ca onto a nickel substrate.

The electrochemical stability of copper substrate was studied in three different lithium-ion battery electrolytes. Cyclic voltammetry was used to study the oxidation-reduction behavior of copper in these electrolyte solutions. The reduction of electrolyte and its effect on the oxidation of copper was also studied. Bulk electrolysis was used to quantitatively study the dissolution of copper in dry electrolytes and in electrolytes doped with impurities of H 2 O or HF. The stability of copper was closely related to the composition of the electrolytes. Impurities dramatically increased the oxidation tendency of copper.