University of Surrey

Test tubes in the lab Research in the ATI Dance Research

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

Zhang, Guobin, Xiong, Tengfei, Pan, Xuelei, Zhao, Yunlong, Yan, Mengyu, Zhang, Haining, Wu, Buke, Zhao, Kangning and Mai, Liqiang (2019) Illumining phase transformation dynamics of vanadium oxide cathode by multimodal techniques under operando conditions Nano Research, 12 (4). pp. 905-910.

[img]
Preview
Text
__homes.surrey.ac.uk_home_.System_Desktop_IlluminingPhaseTransformationDynamics.pdf - Version of Record
Available under License Creative Commons Attribution.

Download (2MB) | Preview

Abstract

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.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering > Advanced Technology Institute
Authors :
NameEmailORCID
Zhang, Guobin
Xiong, Tengfei
Pan, Xuelei
Zhao, Yunlongyunlong.zhao@surrey.ac.uk
Yan, Mengyu
Zhang, Haining
Wu, Buke
Zhao, Kangning
Mai, Liqiang
Date : April 2019
DOI : 10.1007/s12274-019-2321-z
Depositing User : Maria Rodriguez-Marquez
Date Deposited : 30 May 2019 12:37
Last Modified : 30 May 2019 12:37
URI: http://epubs.surrey.ac.uk/id/eprint/851815

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year


Information about this web site

© The University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom.
+44 (0)1483 300800