Issue 48, 2010
From the journal:

Journal of Materials Chemistry

Effect of manganese doping on Li-ion intercalation properties of V2O5 films

D. M. Yu,ab   S. T. Zhang,ab   D. W. Liu,a   X. Y. Zhou,a   S. H. Xie,cd   Q. F. Zhang,a   Y. Y. Liua  and  G. Z. Cao*a  

* Corresponding authors

a Department of Materials Science and Engineering, University of Washington, Seattle, WA, USA

b College of Chemistry and Chemical Engineering, Chongqing University, Chongqing, P. R. China

c Department of Mechanical Engineering, University of Washington, Seattle, WA, USA

d Faculty of Materials, Optoelectronics and Physics, Xiangtan University, Xiangtan, Hunan, P. R. China

Abstract

Mn-doped V2O5 has been prepared by sol–gel processing with H2O2 and V2O5 as precursors with Mn2+ added directly during sol preparation. Stable and homogeneous Mn-doped vanadium oxide sol was obtained and the films were fabricated by dip-coating, drying at ambient, and then annealing at 250 °C in air for 3 h. X-Ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), and electrochemical analyses have been employed to characterize and analyze the crystal- and microstructures, surface morphology and Li-ion intercalation properties of both Mn-doped and undoped V2O5 films. Mn-doped V2O5 films exhibit excellent cyclic stability with a fading rate of less than 0.06% per cycle, significantly better than that of the pure V2O5 films (0.8% per cycle). Mn-doped V2O5 films have demonstrated a large discharge capacity of ∼283mAh/g with a current density of 68 mA/g, again much higher than 237 mAh/g of V2O5 films. A possible explanation for such significant enhancement in lithium ion intercalation capacity, cyclic stability, and rate performance of Mn-doped V2O5 films has been discussed.

Graphical abstract: Effect of manganese doping on Li-ion intercalation properties of V2O5 films

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Article information

DOI
https://doi.org/10.1039/C0JM01252A
Article type
Paper
Submitted
28 Apr 2010
Accepted
19 Sep 2010
First published
12 Oct 2010

J. Mater. Chem., 2010,20, 10841-10846

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Effect of manganese doping on Li-ion intercalation properties of V2O5 films

D. M. Yu, S. T. Zhang, D. W. Liu, X. Y. Zhou, S. H. Xie, Q. F. Zhang, Y. Y. Liu and G. Z. Cao, J. Mater. Chem., 2010, 20, 10841 DOI: 10.1039/C0JM01252A

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