Biomass‐Assisted Synthesis of Tiny Tin Nanoparticles Embedded in Nitrogen/Oxygen Self‐Doped Carbon Nanosheets as High Performance Anode Materials for Sodium‐Ion Batteries

Abstract Constructing high‐performance anode materials through a simple and environmental method to push the development of sodium‐ion batteries (SIBs) is desired. Herein, in this work, waste biomass peanut shells were used as templates and reductor to fabricate a series of tiny tin nanoparticles embedded in nitrogen/oxygen self‐doped carbon (Sn@NOC) nanosheets via a convenient impregnation‐pyrolysis strategy. When evaluated as anodes for SIBs, the optimal Sn@NOC‐700 composite delivers the best electrochemical sodium storage performance with a high specific capacity, an excellent rate capability, and a long‐term cycling stability for 2000 cycles at the current density of 1000 mA g −1 . In addition, the sodium storage kinetics was analyzed by cyclic voltammetry at various scanning rates, which indicates the dominant capacitance contribution to sodium ion transport.