Indexed on: 01 Apr '92Published on: 01 Apr '92Published in: Journal of Materials Science
Reactive deposition is a novel process for producing high-surface-area and highly porous cobalt anodes. The fundamental factors affecting the macro- and microstructure of cobalt electrodes produced by reactive deposition have been studied. The discharge performance of the reactively deposited cobalt anodes is significantly better than those prepared by solid-state sintering. The porous structure of the reactively deposited cobalt electrodes shows unique characteristics of fine and coarse pore network, which enhances the efficiency and utilization of the cobalt anodes. More significantly, it is shown that the porous structure as well as the porosity of the cobalt electrodes can be controlled by monitoring the dynamic states of the Co(OH)2 colloid layer at the electrode surface, i.e. the deposition parameters. Reactive deposition opens up the feasibility of controlling the porous structure of the battery plates to enhance the utilization and efficiency of the battery plates, especially in the case of high loadings.