V2O5/石墨复合材料的电容性能  

Research on supercapacitor performance of V_2O_5/graphite composite material

作　　者：王虹[1] 唐致远[1] 李中延 柳勇[1] 谢辉[1] 

机构地区：[1]天津大学化工学院,天津300072 [2]东莞迈科科技有限公司,广东东莞523800

出　　处：《化工进展》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)

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.

关 键 词：V2O5 复合材料 电化学电容器 炭 

分 类 号：O614.511[理学—无机化学]