摘要
利用水热法合成了海胆状MnO_2,通过吡咯聚合制备了PPy@MnO_2复合结构,研究了包覆时间、包覆量对PPy@MnO_2电化学性能的影响。用PPy@MnO_2纳米复合材料作为工作电极,在1 mol/L的Na_2SO_4溶液中利用三电极体系进行了电化学性能测试。PPy@MnO_2纳米复合材料的循环伏安、恒电流充放电和电化学阻抗谱(EIS)研究表明,PPy@α-MnO_2-60纳米复合材料在吡咯与二氧化锰质量比10∶1、包覆时间6 h时电化学性能最佳,在电流密度0.5 A/g时比电容值为177.3 F/g。
The urchin-like MnO2 was synthesized by hydrothermal method,the PPy@MnO2 was prepared from pyrrole and MnO2 nanosphere,and the effects of coating time and coating content on the electrochemical properties of PPy@MnO2 were investigated.Using the synthetic PPy@MnO2 nanocomposite as the working electrode,the electrochemical performance was measured using a three-electrode system in a 1 mol/L Na2SO4 solution.Studies on cyclic voltammetry,constant current charging and discharging,and electrochemical impedance spectroscopy(EIS) of PPy@MnO2 nanocomposites showed that the electrochemical performance of PPy@MnO2 nanocomposities is the best when the mass ratio of pyrrole to MnO2 is 10∶1 and the coating time is 6 h,the specific capacitance of PPy@α-MnO2-60 is 177.3 F/g in the current density 0.5 A/g.
作者
李倩
符婉琛
张存社
王悦
王伟
LI Qian;FU Wan-chen;HANG Cun-she;WANG Yue;WANG Wei(College of Environment Science and Engineering,Key Laboratory of Subsurface Hydrology and Ecology in Arid Areas,Ministry of Education,Chang'an University,Xi'an 710054,China;Shaanxi Research Design Institute of Petroleum and Chemical Industry,Xi'an 71 0054,China)
出处
《应用化工》
CAS
CSCD
北大核心
2019年第5期995-1000,共6页
Applied Chemical Industry
基金
国家自然科学基金(51678059)
教育部留学回国人员启动基金
长安大学中央高校基本科研业务费(300102298202)
陕西省土地整治重点实验室开放基金项目(2018-JC10)
关键词
二氧化锰
聚吡咯
超级电容器
纳米复合结构
manganese dioxide
polypyrrole
supercapacitor
nanocomposite structure