Sn4P3/SbSn Nanocomposites for Anode Application in Sodium‐Ion Batteries

Abstract A facile one‐pot solvothermal method has been developed to synthesize Sn 4 P 3 /SbSn nanocomposites with a side‐by‐side configuration in individual nanoparticles. We show that introducing SbSn to Sn 4 P 3 in such a configuration can improve the cyclic stability of the phase‐pure Sn 4 P 3 electrode without sacrificing its practical capacity, although the theoretical capacity of SbSn is lower than that of Sn 4 P 3 . The nanocomposite anode delivers a highest capacity of 614.7 mA h g −1 at a current density of 100 mA g −1 and shows superior capacity retention to the phase pure Sn 4 P 3 , SbSn, or physical mixture of Sn 4 P 3 &SbSn based anodes after long cycles. The intact interface between the Sn 4 P 3 and SbSn in the nanocomposite and their synergetic effect play important roles in enhancing the electrochemical performance of the composite electrode.