为了提高TiO₂负极材料的电化学性能，采用球磨-超声-水热法制备了TiO₂/C/BP复合负极材料，测定了材料的循环放电比容量、倍率性能、循环伏安曲线和交流阻抗。结果表明，二氧化钛掺杂石墨、黑磷后，二氧化钛晶型不受影响，TiO₂/C/BP复合材料颗粒分散性得到改善、交流阻抗减小、导电性明显增强，与纯TiO₂相比，电流密度为100 mA/g，首圈放电比容量由320 mA·h/g提高到502 mA·h/g，第3圈放电比容量由175 mA·h/g提高到335 mA·h/g，经过100次循环后，纯TiO₂的放电比容量降至98 mA·h/g，而TiO₂/C/BP的放电比容量仍维持在255 mA·h/g，放电比容量保持率明显提高，库伦效率的稳定性也得到显著提高。

For the goal of improving the electrochemical performance of TiO₂ anode material,TiO₂/C/BP composite anode electrode material is prepared by ball grinding-ultrasonic-hydrothermal method.Cyclic discharge specific capacity,ratio performance,cyclic voltammetry curve and alternating-current impedance of the material are measured.Results show that the phase structure of TiO₂ remains unchanged after doping with graphite and black phosphorus,and TiO₂/C/BP composites have an improved particles dispersibility,a reduced alternating-current impedance and an enhanced electrical conductivity.Compared with pure TiO₂,TiO₂/C/BP composites generates a current density of 100 mA·g^-1,its specific discharge capacity at the first cycle increases from 320 mAh·g^-1 to 502 mAh·g^-1,and that at the third cycle increases from 175 mAh·g^-1 to 335 mAh·g^-1.After 100 cycles,specific discharge capacity of pure TiO₂ drops to 98 mAh·g^-1,that of TiO₂/C/BP still maintains at 255 mAh·g^-1.TiO₂/C/BP composites exhibit better discharge specific capacity retention rate and coulomb efficiency stability.

铁云飞(1995-),男,硕士研究生,研究方向为电极材料,1084362282@qq.com