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Effect of IrO2 Content on Microstructure and Capacitance of IrO2-CeO2-G/Ti Electrode
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1.College of Materials Science and Engineering,Fuzhou University,Fuzhou,350108;2.China

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Fund Project:

The National Natural Science Foundation of China (21875038)

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    Abstract:

    The novel IrO2-CeO2-G/Ti composite electrodes were prepared by thermal decomposition method. The synthesized electrodes with different IrO2 content had been characterized by scanning electron microscope(SEM), transmission electron microscope(TEM), X-ray diffraction(XRD) and X-ray photoelectron spectroscopy(XPS). The electrochemical performances of the electrodes were investigated by cyclic voltammetry, galvanostatic charge–discharge and electrochemical impedance spectroscopy in 0.5 M H2SO4 solution. The results showed that the electrode with 2.5mg/cm2 IrO2 exhibited an excellent specific capacitance value of 459.5 F/g, and the specific capacitance maintained about 97.8% after 5000 charge-discharge cycles at a 5mA/cm2 current density. The electrode with 2.5mg/cm2 IrO2 was an ideal electrode for supercapacitor due to?its unique composition proportion and the excellent pseudocapacitance property.

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[Shanfeng HUANG, Keke FENG, Yanhong WANG, Shuai ZHANG, Yanqun SHAO, Kongfa CHEN, Dian TANG. Effect of IrO2 Content on Microstructure and Capacitance of IrO2-CeO2-G/Ti Electrode[J]. Rare Metal Materials and Engineering,2020,49(5):1533~1538.]
DOI:10.12442/j. issn.1002-185X.20181261

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History
  • Received:December 18,2018
  • Revised:January 03,2019
  • Adopted:January 09,2019
  • Online: June 05,2020
  • Published: