首页|Microdefects evolution and electrochemical performance modulation of Mn doped VO2(B) nanorods
Microdefects evolution and electrochemical performance modulation of Mn doped VO2(B) nanorods
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NSTL
Elsevier
? 2022 Elsevier B.V.A series of nano-V1-xMnxO2 samples (x = 0–0.035) were prepared by a simple solvothermal method. XRD patterns and the Rietveld refinement results of V1-xMnxO2 samples showed that Mn ions were incorporated into the V sites during the solvothermal process. XPS results indicated that the valence state of Mn ion was a mixed state of Mn2+, Mn3+ and Mn4+. The corresponding relationship between the diameter, specific surface area and electrochemical performances of V1-xMnxO2 nanorods was studied. It can be found that Mn doping promoted the insertion of K+ ions into the electrode material and improved the conductivity, discharge capacity and cycle stability, which was due to more defects induced by Mn doping. The x = 0.020 sample had the largest specific capacitance (the 88% capacity retention rate after 550 cycles at 0.1 A·g?1) due to the improvement of structural stability by Mn-ion doping. These results provide great potential applications for nano-VO2(B) in the cathode material of lithium-ion battery and supercapacitor.
School of Physics and Electronic Engineering Henan Key Laboratory of Magnetoelectronic Information Functional Materials Zhengzhou University of Light Industry
NSTL
Elsevier
