Loading and Utilization of Active Material in Nickel Composite Electrodes: Optimization
NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD
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As an attempt to reduce nickel battery weight, the nickel composite electrode Ni. C. E., has been under development. Investigations were undertaken to determine the optimum conditions for loading and utilizing nickel hydroxide active material in nickel composite electrodes. The main emphasis was placed on the improvement of both loading efficiency by electrochemical impregnation and utilization efficiency of the NiOH2 active material. The efficiencies were examined as functions of such electrochemical conditions as current density, nickel concentration, pH, temperature of the impregnating bath, the continuity of current flow and manner of adding CoOH2 additive. Also studied was the loading efficiency of chemical impregnation polarization method and the suspension method which enables a direct loading of externally prepared active material into the composite body. The most important factor for a quick utilization of the active material was found to be the additive distribution. A model of the additive distribution in the active material is proposed to account for different patterns of utilization exhibited by the electrodes.
- Electrical and Electronic Equipment
- Electrochemical Energy Storage