Статья
2018

Preparation and Supercapacitive Performance of Lead Dioxide Electrodes with Three-Dimensional Porous Structure


Yingwu Yao Yingwu Yao , Xin Chen Xin Chen , Naichuan Yu Naichuan Yu , Feng Wei Feng Wei , Huailiang Feng Huailiang Feng
Российский электрохимический журнал
https://doi.org/10.1134/S1023193518070078
Abstract / Full Text

The three-dimensional porous structure PbO2 electrodes (3D-PbO2 electrodes) were prepared in the lead nitrate solution by potentiostatically electrodeposition method using oxygen bubble as dynamic template, which can be used as the positive materials of the supercapacitors. The morphology and structure of 3D-PbO2 electrodes were characterized by scanning electron microscope (SEM) and X-ray diffraction (XRD). The supercapacitive performance of 3D-PbO2 electrodes were investigated by cyclic voltammetry (CV), galvanostatic charge-discharge tests (GCD) and electrochemical impedance spectroscopy (EIS). The specific capacitance of 3D-PbO2 electrodes can reach 195.6 F g–1 at 0.2 A g–1, which is 2.8 times higher than that of Flat-PbO2 electrodes (68.8 F g–1). The charge transfer resistance (Rct) of 3D-PbO2 electrodes (8.21 Ohm cm–2) is lower than that of Flat-PbO2 electrodes (21.32 Ohm cm–2). The excellent supercapacitive performance of 3D-PbO2 electrodes can be attributed to the three-dimensional porous structure, which can enlarge the active surface area of lead dioxide electrodes and promote the electrolyte diffusion and electrons propagation.

Author information
  • Hebei University of Technology, School of Chemical Engineering and Technology, Tianjin, 300130, China

    Yingwu Yao, Xin Chen, Naichuan Yu, Feng Wei & Huailiang Feng

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