超级电容器用无定形V_2O_5电容性能研究  

Capacitive Performance of Amorphous V_2O_5 for Supercapacitor

作　　者：黄建华[1] 赖琼钰[1] 宋建梅[1] 陈联梅[1] 吉晓洋[2] 

机构地区：[1]四川大学化学学院,成都610064 [2]四川大学分析测试中心,成都610064

出　　处：《无机化学学报》2007年第2期237-242,共6页Chinese Journal of Inorganic Chemistry

基　　金：教育部博士点基金资助项目(No.20020610027)

摘　　要：本文采用淬冷法制备了V2O5样品。采用FTIR、XRD对其进行了表征。结果表明所制样品为无定形V2O5。通过循环伏安法和恒电流充放电测试研究其电容特性,并探讨了电化学反应机理。电化学性能测试结果表明,水基电解液种类及浓度、电压范围、扫描速度、电流密度均对无定形V2O5电容性能产生影响。在1mol·L-1NaNO3溶液中,电位窗口为-0.2～0.8V(vsSCE)范围内,5mV·s-1的扫描速度下,无定形V2O5具有良好的电容性能;在250mA·g-1的电流密度下,比电容为185.1F·g-1,循环性能良好。V2O5 was prepared by quenching method. The sample （XRD）. The test results show that the sample is amorphous measured by cyclic voltammetry （CV） and constant current c was characterized by FTIR and X-ray diffraction V2O5 The capacitive performance of V2O5 was mechanism was also discussed. Electrochemical results indicate that the kinds of the aqueous electrolyte, potential limit, scan rate, current density have influence on V2O5 capacitive performance. In the range of -0.2- 0.8 V （vs SCE）, at 250 mA·g^-1 constant current density, amorphous V2O5 exhibits a specific capacitance value of 185.1 F·g^-1 with excellent cyclability in 1 mol. L^-1 NaNO3 electrolyte.

关 键 词：五氧化二钒 无定形 超级电容器 水基电解液 电容性能 

分 类 号：O611.62[理学—无机化学] O614.511[理学—化学]