Multi-scaled Sn Dispersed in Ni-Ti Shape Memory Alloy as High Performance Anode for Li-ion Battery

Li-ion batteries are very important power sources for portable electronic devices due to their high energy density, long lifespan, flexible design, and so on. However, the commercially available graphite-based anodes have the obvious disadvantage of limited capacity (372 mAh g–1/837 mAh cm3).Thus, there is a strong demand for the development of new anode materials with higher specific energy to replace graphite anodes.[1] However, the great challenge for using Sn as an anode material is the capacity fading and large initial irreversible capacity loss due to fracture of the electrode, which is induced by the extremely large volume change of Sn during cycling.[2,3] Based on the above, it is very important to reduce the initial irreversible capacity loss of Sn-based electrode