Abstract: V2O5 was synthesized by the sol-gel process. Graphite was doped into V2O5 through ball milling. Scanning electron microscopy (SEM)，X-ray diffraction (XRD), cyclic voltammetry, and electrochemical impedance spectroscopy indicated that graphite could change the microstructure and composition of V2O5 electrodes. The non-symmetric electrochemical capacitors consisting of V2O5/C composite material and graphite, 1mol/L LiClO4(EC:DEC =1:1)organic solution as electrolyte, reached the specific energy of 18.3wh/kg and the capacity attenuation of 25.68% after cycling 400 times. The specific capacity and cycling performance were dramatically improved as compared with V2O5 without doping.

摘要： 溶胶凝胶法制备V2O5，采用球磨法将V2O5与石墨进行固相混合，经扫描电镜（SEM）、X射线衍射（XRD）、循环伏安、交流阻抗等测试手段分析，得出石墨可改变V2O5电极的微结构和组成；由20%V2O5/C复合材料和石墨组成的非对称电化学电容器，以1 mol/L LiClO4（EC:DEC=1:1）有机溶液为电解液，比能量可达到18.3 W·h/kg，比纯V2O5提高56.8％，循环400次后复合材料的容量衰减为25.68％，比容量和循环性能较掺杂前得到显著提高。