Electrochemistry of nickel oxide films in aqueous and Li+ containing non-aqueous solutions: an application for a new lithium-based nickel oxide electrode exhibiting electrochromism by a reversible Li+ ion insertion mechanism

Abstract The new composition Li 0.6 + Ni 0.70 II O 2− was prepared by room temperature electrochemical insertion of lithium into X-ray-amorphous nickel-oxide-based film. The film undergoes a reversible electrochemical Li + insertion process which is accompanied by a net electrochromic effect.