▎ 摘 要
NASICON-type NaTi2(PO4)(3) is recently expected to be an advanced anode material for sodium-ion batteries due to its low cost, good thermal stability, high theoretical capacity and environmental compatibility. Nevertheless, the intrinsic poor electronic conductivity of pure NaTi2(PO4)(3) leads to bad rate capability and cyclic stability. In this research, the N-doped graphene-decorated NaTi2(PO4)(3)@C composite has been prepared through a facile sol-gel approach followed by thermal treatment. The NaTi2(PO4)(3)@C particles are adhered to the surface of N-doped graphene and enwrapped into the N-doped graphene sheets uniformly. Due to the enhanced electronic conductivity, the as-fabricated electrode exhibits excellent electrochemical performances: high reversible capacity (128.9 mAh g(-1) at 0.2C), good rate capability (119.7 mAh g(-1)at 5C), and stable cyclic property (capacity retention of 98.6% after 30 cycles at 10C). These results reveal that the designed composite is a promising anode material for advanced electrochemical energy storage.