Electrochemical and mechanical properties of superelastic electrode consisting of Ti substitute LiNiO2 film on Ti-50Ni alloy

By annealing Ni film/Li film/Ti-50Ni alloy in O2 atmosphere, we fabricated a superelastic electrode consisting Ti-LiNiO2 film as a cathode material and TiNi substrate as a current collector. The electrode with partial shape memory effect and superelasticity exhibited a high operating voltage of 3.7 V and a good reversibility of Li ion. An increased MS of TiNi alloy in the electrode was attributed to a compressive stress imposed by TiO2 and Li0.98 Ni0.7Ti0.3O1.92 layers.