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Citation: Ao XIA, Botao YU, Jun CHEN, Guoqiang TAN. Preparation and electrochemical property of Ce-doped MnO2[J]. Chinese Journal of Inorganic Chemistry, ;2025, 41(12): 2514-2526. doi: 10.11862/CJIC.20250163 shu

Preparation and electrochemical property of Ce-doped MnO2

  • Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, School of Material Science and Engineering, Shaanxi University of Science and Technology, Xi′ an 710021, China

  • Corresponding author: Ao XIA, xiaao@sust.edu.cn
  • Received Date: 14 May 2025
    Revised Date: 20 October 2025

Figures(9)

  • MnO2 powders doped with different ratios of Ce ions are synthesized by hydrothermal method. X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS), nitrogen adsorption-desorption, cyclic voltammetry, constant-current charge/discharge, and electrochemical impedance spectroscopy tests were used to analyze the structural, morphological, and electrochemical properties. The results showed that after doping with Ce ions, the specific surface area of MnO2 increased, the number of oxygen vacancies rose, and the structure became more stable; therefore, the electrode demonstrated more excellent electrochemical performance. The specific capacitance of the optimal sample C6M (the molar ratio of the introduced Ce to the theoretical generation MnO2 was 6%) could reach 192.6 F·g-1 at 1 A·g-1. When the current density increased from 1 to 10 A·g-1, the retention rate of the specific capacitance was 86.4%. After 5 000 cycles at 10 A·g-1, the retention rate of specific capacitance was 83.3%.
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