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Updated: Jan 27, 2026

Electrochemical Impedance Spectroscopy as a Tool for Electrochemical Rate Constant Estimation
Published on: October 10, 2018
Enhanced Electrochemical Performances of Cobalt-Doped Li₂MoO₃ Cathode Materials
Zhiyong Yu1,2, Jishen Hao3,4, Wenji Li5,6
1State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China. yuzhiyong@whut.edu.cn.
Abstract:
Co-doped Li₂MoO₃ was successfully synthesized via a solid phase method. The impacts of Co-doping on Li₂MoO₃ have been analyzed by X-ray photoelectron spectroscopy (XPS), X-ray powder diffraction (XRD), scanning electron microscope (SEM), and Fourier transform infrared spectroscopy (FTIR) measurements. The results show that an appropriate amount of Co ions can be introduced into the Li₂MoO₃ lattices, and they can reduce the particle sizes of the cathode materials. Electrochemical tests reveal that Co-doping can significantly improve the electrochemical performances of the Li₂MoO₃ materials. Li₂Mo0.90Co0.10O₃ presents a first-discharge capacity of 220 mAh·g-1, with a capacity retention of 63.6% after 50 cycles at 5 mA·g-1, which is much better than the pristine samples (181 mAh·g-1, 47.5%). The enhanced electrochemical performances could be due to the enhancement of the structural stability, and the reduction in impedance, due to the Co-doping.
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