Effects of barium and cobalt on electrochemical performance of nickel hydroxide with chemically co-precipitated zinc

The effects of Ba(OH)2 and Co(OH)2 on electrochemical performance of nickel hydroxide prepared with chemically co-precipitated zinc in a nickel-metal hydride battery (Ni-MH) are studied. The results show that the oxygen-generation potential and the discharge depth of the nickel electrode are improved by the combined addition of Ba(OH)2 and Co(OH)2 compared with only Co(OH)2. The capacity of the Ni-MH battery is also enhanced due to increase in the utilization of the active material of the positive electrode.