Pressure‐Induced Synthesis of Homogeneously Dispersed Sn/SnO 2 /C Nanocomposites as Advanced Anodes for Lithium‐Ion Batteries

SnO x attracts considerable attention as an anode of lithium‐ion batteries (LIBs) because of its high theoretical capacity. However, SnO x suffers from poor cyclability and rate capability caused by large volume change upon cycling and low conductivity, which severely limits its application for LIBs. Herein, a nanocomposite of Sn/SnO 2 /C is synthesized for the first time under an elevated pressure originated from the pyrolysis of dimethyltin oxide in a sealed vessel. The Sn/SnO 2 /C nanocomposite consists of a homogeneous dispersion of Sn and SnO 2 nanocrystals (<10 nm) into the carbon matrix, which endows it with an enhanced lithium storage performance. The Sn/SnO 2 /C nanocomposite delivers an excellent cyclability (0.025% capacity loss per cycle during 1000 cycles at 1 A g −1 ) with an improved rate performance (243.8 mAh g −1 at 5 A g −1 ).