Tuning the Electronic Structure of Niobium Oxyphosphate/Reduced Graphene Oxide Composites by Vanadium‐Doping for High‐Performance Na + Storage Application

ABSTRACT Sodium‐ion batteries have become a significant research focus in academia. As a novel sodium anode material, layered NbOPO 4 , consisting of octahedral NbO 6 units sharing oxygen atoms with tetrahedral PO₄ units, exhibits stability due to strong phosphorus‐oxygen covalent bonds that prevent oxygen loss from the framework. However, its inherently low electrical conductivity and sluggish charge transfer kinetics limit its electrochemical performance. To address these challenges, we designed and synthesized vanadium‐doped niobium oxyphosphate coated with reduced graphene oxide (V‐NbOPO 4 @rGO) via a microwave hydrothermal method followed by calcination. Vanadium doping effectively modulated the…

• NN
  National Natural Science Foundation of China

  Award: 22271066
• GU
  Guangdong University of Technology