Electrochemical properties of Si film electrodes with TiNi shape memory alloy as a current collector

► We made Si/TiNi cathode by depositing Si thin film on TiNi shape memory alloy current collector. ► We observed that stress-induced martensitic transformation occurred at TiNi current collector by the stress developed in Si thin film during charging and discharging. ► We confirmed that the superelasticity of TiNi current collector was effective to improve cycle life of Si/TiNi cathode.