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Full-Text Articles in Physical Sciences and Mathematics
Preparation And Electrochemical Capacitance Of Spherical-Like Polypyrrole Doped With Heparin Sodium, Hong-Yu Mi, Xiao-Gang Zhang, Su-Dong Yang, Xiang-Guo Ye
Preparation And Electrochemical Capacitance Of Spherical-Like Polypyrrole Doped With Heparin Sodium, Hong-Yu Mi, Xiao-Gang Zhang, Su-Dong Yang, Xiang-Guo Ye
Journal of Electrochemistry
Spherical-like polypyrrole with an average diameter of 100 nm as the electrode material for supercapacitor was prepared by a self-assembly process with heparin sodium salt as the dopant at-10 ℃.The morphology and electrochemical properties were characterized by transmission electron microscopy(TEM),cyclic voltammetry(CV),galvanostatic charge/discharge and electrochemical impedance spectroscopy(EIS) measurements.The results showed that the polypyrrole doped with heparin sodium salt exhibited good capacitive behavior.The specific capacitance of single electrode was up to 338 F/g at 3 mA/cm2.
Property Of Organic Electrolyte In V_2o_5/C Electrochemical Capacitor, Hong Wang, Zhi-Yuan Tang, Zhong-Yan Li, Xin-Guo Zhuang
Property Of Organic Electrolyte In V_2o_5/C Electrochemical Capacitor, Hong Wang, Zhi-Yuan Tang, Zhong-Yan Li, Xin-Guo Zhuang
Journal of Electrochemistry
In this work,the V2O5 cathode and graphite anode were assembled into non-symmetric electrochemical capacitors using 1.0 mol/L LiClO4 /(EC + DMC),1.0 mol/L LiPF6 /(EC + DEC + DMC),and 1.6mol/L Et4NBF4/AN as electrolyte,respectively.Charging and discharging tests,Cyclic Voltammetry and AC impedance methods were used to investigate the performance of the non-symmetric electrochemical capacitors.The results showed that the electrolyte 1.0 mol/L LiClO4/(EC+DMC)displayed better cycling performance and less resistance.At the current density of 500 mA/g,its specific energy reached 8.4 Wh/kg and the charge-discharge efficiency was 98%.