Development of Gas-Phase Metallized Plaques for Electrodes of Storage Batteries, in Particular for Nickel Oxide Electrodes

摘要

Nickel oxide-electrode plaques for alkaline batteries have been developed by CVD-plating fiber plaque substrates with nickel from nickelcarbonyo. Carbon felt proved to be a suitable substrate and large (22 x sq 15 sq cm) and thick 3 - 5 mm) plaques could be made from this material. Three metallization devices were constructed, one of which allowed continuous processing with carbonyl gas flowing through the felt; this improved evenness of nickel distribution. The physical properties of the plaques - structure, electric resistance, heat conduction, gas permeation - have been approximated by simple models and the corresponding calculations have been compared with measurements. Nickel oxide electrodes have been made from the plaques and have been cycled in half-cell arrangements. The project goals concerning nickel savings, capacity per unit area and current capability have been reached.