A consideration on the Ni(OH)₂ anode of a Ni-MH (nickel metal hydride) battery for a solar vehicle

Abstract

The Ni-MH rechargeable battery has been frequently used for recent new electric vehicles and hybrid type vehicles. Our solar car team has investigated the cathodes of Ni-MH rechargeable battery. For our investigations, we have used a sintered Ni(OH)₂ electrode as anode for our battery. However, this conventional anode was found to show discharge capacity less than that of cathode of a hydrogen storage alloy. In addition, the weight of the anode was much larger than that of the cathode when compared in a same size. In this study we succeeded to decrease the weight of anode and to increase the discharge capacity of anode by adding Ag₂O into Ni(OH)₂.