Ni-Cd Batteries as Hydrogen Storage Units of High-Capacity

In this study, it has been experimentally proven that the electrodes of the Ni-Cd batteries in the process of their operation absorb hydrogen in large quantities. There is no hydrogen inside the electrodes of new batteries, but after five years of service life the electrodes reach their maximum hydrogen capacity. The capacity of an oxide-nickel electrode as a hydrogen absorber was quantified as 13.4 wt% and 400 kg . m(-3). These values exceed twice the earlier data obtained for any reversible metal hydrides, obtained using traditional methods. (c) 2012 The Electrochemical Society. All rights reserved.