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。
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.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2008年第7期1048-1051,1069,共5页
Chemical Industry and Engineering Progress
基金
广东省教育部产学研资助项目(2007A090302006)
关键词
V2O5
复合材料
电化学电容器
炭
V2O5
compound materials
electrochemical capacitor
carbon
