Research Article


2019, 12(4): 905–910


Illumining phase transformation dynamics of vanadium oxide cathode by multimodal techniques under operando conditions

Guobin Zhang1,§, Tengfei Xiong1,§, Xuelei Pan1, Yunlong Zhao2,3 (*), Mengyu Yan4 (*), Haining Zhang1, Buke Wu1, Kangning Zhao1, and Liqiang Mai1 (*)

View Author's information

1 State Key Laboratory of Advanced Technology for Materials, Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
2 Advanced Technology Institute, University of Surrey, Guildford GU2 7XH, UK
3 National Physical Laboratory, Teddington TW11 0LW, UK
4 Materials Science and Engineering Department, University of Washington, Seattle, WA 98195-2120, USA
§ Guobin Zhang and Tengfei Xiong contributed equally to this work.

Keywords: in-situ X-ray diffraction (XRD), in-situ Raman, electrochemical process, phase transformation
Full article PDF
Cite this article(Endnote)
Share this article

views: 156

Citations: 0

  • Abstract
  • References
  • Electronic Supplementary Material
Subtle structural changes during electrochemical processes often relate to the degradation of electrode materials. Characterizing the minutevariations in complementary aspects such as crystal structure, chemical bonds, and electron/ion conductivity will give an in-depth understanding on the reaction mechanism of electrode materials, as well as revealing pathways for optimization. Here, vanadium pentoxide (V2O5), a typical cathode material suffering from severe capacity decay during cycling, is characterized by in-situ X-ray diffraction (XRD) and in-situ Raman spectroscopy combined with electrochemical tests. The phase transitions of V2O5 within the 0–1 Li/V ratio are characterized in detail. The V–O and V–V distances became more extended and shrank compared to the original ones after charge/discharge process, respectively. Combined with electrochemical tests, these variations are vital to the crystal structure cracking, which is linked with capacity fading. This work demonstrates that chemical bond changes between the transition metal and oxygen upon cycling serve as the origin of the capacity fading.
Related Article
Cite this article

Illumining phase transformation dynamics of vanadium oxide cathode by multimodal techniques under operando conditions. Nano Res. 2019, 12(4): 905–910

Download citation