Revealing mechanism responsible for structural reversibility of single-crystal VO2 nanorods upon lithiation/delithiation

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

  • Guoqiang Tan
  • Peng Wang
  • Sasitha C. Abeyweera
  • Dongtang Zhang
  • Yangchun Rong
  • Yimin A. Wu
  • Jun Lu
  • Cheng-Jun Sun
  • Yang Ren
  • Yuzi Liu
  • Ralph T. Muehleisen
  • Leah B. Guzowski
  • Jie Li
  • Xianghui Xiao
  • Yugang Sun

Detail(s)

Original languageEnglish
Pages (from-to)197-205
Journal / PublicationNano Energy
Volume36
Online published17 Apr 2017
Publication statusPublished - Jun 2017
Externally publishedYes

Abstract

A pure phase of VO2(B) nanorods have been synthesized through an energy-efficient microwave hydrothermal reaction and used as cathode materials of lithium ion batteries, which exhibit promising specific capacity (e.g., 130 mA h g−1 even after 100 charge/discharge cycles) and rate capacity (e.g., ~130 mA h g−1 at a high current of 400 mA g−1 ). The excellent cyclability originates from the structural reversibility of VO2(B) upon lithiation/delithiation that is confirmed by the in situ high-energy synchrotron X-ray diffraction (HEXRD) and in situ x-ray adsorption near-edge spectroscopy (XANES) of the VO2 nanorods in operating battery cells. The real-time results reveal that discharge forces lithium ions to insert firstly into the tunnels with the largest size along b direction followed by the second largest tunnels along c direction, which is completely reversible in the charge process.

Research Area(s)

  • Li ion battery, Microwave synthesis, Structural reversibility, Synchrotron characterization, Vanadium dioxide

Citation Format(s)

Revealing mechanism responsible for structural reversibility of single-crystal VO2 nanorods upon lithiation/delithiation. / Liu, Qi; Tan, Guoqiang; Wang, Peng; Abeyweera, Sasitha C.; Zhang, Dongtang; Rong, Yangchun; Wu, Yimin A.; Lu, Jun; Sun, Cheng-Jun; Ren, Yang; Liu, Yuzi; Muehleisen, Ralph T.; Guzowski, Leah B.; Li, Jie; Xiao, Xianghui; Sun, Yugang.

In: Nano Energy, Vol. 36, 06.2017, p. 197-205.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal