Auricularia-like V2O5 anchored on NiTi alloy wire for quasi-solid-state fibrous zinc-ion batteries with shape memory function

With the continuous development of flexible wearable devices, the integration of zinc-ion batteries with shape memory function is of substantial importance for the next generation of wearable electronic devices. Herein, a novel quasi-solid-state fibrous shape memory zinc-ion battery (SMZIB) has been fabricated by using auricularia-like V2O5 anchored on NiTi alloy wire as the cathode and zinc wire as the anode. It is worth noting that the SMZIB can be used as a flexible energy storage device with good shape memory ability, which can be restored to the initial design shape upon heating at approximately 50 °C after deformation. Furthermore, the SMZIB device retains 90.7% of its initial capacity after 200 shape-recovery cycles and has a capacity retention of 95.8% after 1000 charge-discharge cycles, demonstrating good cycling stability.