The proton exchange chemistry of layered Ni(OH)2 for two types of high-capacity cathode materials in rechargeable batteries

Abstract Based on the studies of the first proton exchange/remove of layered Ni(OH) 2 , super nickel oxide has been prepared with strongly alkaline concentrated sodium hypochlorite solution. The primary alkaline super nickel battery equipped with the prepared NiOOH cathode provides an energy capacity 2 times as large as that of the existing alkaline manganese batteries under high drain. In addition, according to the second proton exchange of Ni(OH) 2 , the layered NiOOLi has also been synthesized by means of the proton/Li-ion exchange of super nickel oxide in LiOH solution, and then in molten lithium hydroxide. It provides higher discharge voltage and capacity than that of the widely adopted LiCoO 2 and LiMn 2 O 4 .