Electrochemical Impregnation of Sintered Nickel Structures with Cadmium Using Constant Current Step and Alternating-Current Pulse Techniques.

摘要

Cadmium electrodes, made by impregnation of sintered nickel plaques with cadmium hydroxide by three electrochemical techniques followed by formation to cadmium, can be used as efficient electrodes in nickel-cadmium secondary cells yielding capacities as high as 9.8 A-hr/cu in. for aerospace secondary power. In flooded, negative limited cells electrodes made with a constant current step technique retained 80% of the original capacity after 750 cycles at 100% depth of discharge, over a varying temperature range from 21 to 43C. Alternating current pulse techniques, either symmetric or assymetric with respect to time, can yield electrodes with loadings of 2.1 - 2.3 g. of Cd(OH)2 per cubic centimeter of void. These electrodes show promise of being efficient for use in either flooded or starved electrolyte cells.