钨掺杂V_(2)O_(5)的制备及其超级电容器性能  

Preparation and Performance of Tungsten-doped V_(2)O_(5) for Supercapacitor

作　　者：代于婷 朱基亮[1] DAI Yu-ting;ZHU Ji-liang(Department of Materials Science and Engineering,Sichuan University,Sichuan Chengdu 610064,China)

机构地区：[1]四川大学材料科学与工程学院,四川成都610064

出　　处：《广州化工》2021年第23期46-50,56,共6页GuangZhou Chemical Industry

摘　　要：采用简单的水热法结合后续的煅烧合成了不同浓度钨掺杂的五氧化二钒(V_(2)O_(5))多孔微球,利用场发射扫描电子显微镜,X射线粉末衍射仪、能量色散X射线能谱仪和X射线光电子能谱仪对材料结构和组成进行了表征。采用循环伏安、恒流充放电和电化学阻抗测试在三电极体系下测定了该电极材料在5 M LiNO_(3)电解液的电化学性能。恒流充放电测试结果表明钨掺杂大幅提高了V_(2)O_(5)的比电容。A simple hydrothermal method combined with subsequent calcination was used to synthesize porous V_(2)O_(5) microspheres doped with tungsten at different concentrations.The field emission scanning electron microscope,X-ray powder diffractometer,energy dispersive X-ray energy spectrometer and X-ray photoelectron spectrometer were employed to synthesize porous V_(2)O_(5) microspheres with different doping concentrations.The material structure and composition were characterized.Cyclic voltammetry,constant current charge-discharge and electrochemical impedance were used to determine the electrochemical performance of the electrode material in a 5 M LiNO_(3) electrolyte under a three-electrode system.The constant current charge and discharge test results showed that the tungsten-doped V_(2)O_(5) greatly increased the specific capacitance of V_(2)O_(5).

关 键 词：超级电容器 V_(2)O_(5) 钨掺杂 多孔微球 

分 类 号：TQ152[化学工程—电化学工业]