PbO_2+WO_3·H_2O复合电极材料在混合超级电容器中的赝电容性能研究  

Pseudocapacitive behavior of PbO_2+ WO_3·H_2O composite in hybrid supercapacitor

作　　者：丹媛媛[1] 张丽[1] 陈景晶 曹春纪 

机构地区：[1]江苏科技大学环境与化学工程学院,镇江212003

出　　处：《黑龙江大学自然科学学报》2014年第6期784-789,共6页Journal of Natural Science of Heilongjiang University

基　　金：国家自然科学基金资助项目(21201087);江苏省自然科学基金资助项目(BK20130460;BK20131244);无机合成与制备化学国家重点实验室(吉林大学)开放课题(2014-14);江苏省高等学校自然科学研究项目(11KJB150004)

摘　　要：为提高混合超级电容器正极Pb O2的赝电容性能,采用温和水相沉淀法制备了纳米WO3·H2O粒子,通过复合共沉积法将WO3·H2O嵌入Pb O2镀层中,制备了Pb O2+WO3·H2O复合电极材料。采用X射线衍射(XRD)、X射线光电子能谱(XPS)、扫描电子显微镜(SEM)等分析方法对复合电极材料的组成、结构和形貌进行了表征。通过循环伏安扫描(CV)和充放电等电化学测试,对复合电极材料在超级电容器中的赝电容性能进行了研究。结果表明,该复合电极材料由β-Pb O2和WO3·H2O组成;随着WO3·H2O含量的增加,复合材料的比表面积和孔隙率随之增加;其比电容值可达到320 F·g-1,表现出了良好的赝电容性能。The WO3·H2O was imbedded into the PbO2 matrix for increasing the pseudocapacitance of PbO2 in ultrabattery. The nano WO3·H2O was prepared by a mild aqueous synthesis method first. Then, PbO2 ＋ WO3·H2O composite electrode material was prepared by a composite electrodeposition method. The composition, structure and morphology of the composite electrode material were investigated by X-ray diffraction （XRD）, X-ray photoelectron spectroscopy （XPS） and scanning electron microscopy （SEM）. Our results revealed that the specific surface area and porosity of composite electrode material increased with the WO3·H2O doping. The capacitance performance of the composites was investigated by cyclic voltammetry （CV） and charge-discharge tests. The results showed that the composite material had the good capacitance performance with a high specific capacitance up to 320 F · g^-1.

关 键 词：赝电容 复合共沉积 二氧化铅 

分 类 号：O646[理学—物理化学]