Novel structurally-stable Na-rich Na4V2O7 cathode material with high reversible capacity by utilization of anion redox activity

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

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Author(s)

  • Hanqin Liang
  • Junnan Liu
  • Jimmy Wu
  • Neeraj Sharma
  • Qinfen Gu
  • Bernt Johannessen

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)8245-8248
Journal / PublicationChemical communications (Cambridge, England)
Volume56
Issue number59
Online published15 Jun 2020
Publication statusPublished - 28 Jul 2020

Abstract

A sodium-rich vanadium compound, Na4V2O7, is investigated as a cathode material for sodium-ion batteries, which delivers a high reversible capacity of 194 mA h g-1 after activating to 4.7 V. By limiting the cut-off voltage to 4.4 V, a good capacity retention of 93% after 50 cycles is achieved. The material exhibits a negligible volume variation of 1.04% during Na+(de-)intercalation, demonstrating that Na4V2Ois structurally-stable.

Citation Format(s)

Novel structurally-stable Na-rich Na4V2O7 cathode material with high reversible capacity by utilization of anion redox activity. / Su, Bizhe; Liang, Hanqin; Liu, Junnan; Wu, Jimmy; Sharma, Neeraj; Gu, Qinfen; Johannessen, Bernt; Yu, Denis Y. W.

In: Chemical communications (Cambridge, England), Vol. 56, No. 59, 28.07.2020, p. 8245-8248 .

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