Physico-chemical and electro-chemical properties of nickel hydroxide precipitated in the presence of metal additives

Nickel hydroxide has been prepared chemically and electrochemically from sulfate and nitrate media respectively. The effect of bimetallic additives Cd–Zn, Cd–Mn, Cd–Co, Cd–Fe, Cd–Al during chemical precipitation on discharge capacity has been studied. A discharge capacity of 190 mAh/g of nickel hydroxide was observed for nickel hydroxide precipitated in presence of Cd and Al; and a capacity of 200 mAh/g was obtained with a sample that was produced electrochemically at a current density of 50 A/m2.