One dimensional SbO2/Sb2O3@NC microrod as anode for lithium‐ion and sodium‐ion batteries

Sb‐based oxides electrodes have received tremendous attention owing to their high theoretical capacities and electrochemical activities. However, the huge volume change during ion insertion/extraction process and poor electronic conductivity limit their wide applications in the electrochemical energy storage. In this study, SbO2/Sb2O3 nanoparticles embedded in N‐doped carbon fibers are successfully synthesized. The composite can display a high reversible specific capacity of 622 mAh g−1 for lithium‐ion batteries and a desirable reversible capacity 307 mAh g−1 for sodium‐ion batteries at current density of 100 mA g−1. Such superior lithium and sodium storage performance can be ascribed to that carbon fibers can effectively restrict the large volume change and enhance the electrochemical stability.