Revealing the Structural Evolution and Phase Transformation of O3-Type NaNi1/3Fe1/3Mn1/3OCathode Material on Sintering and Cycling Processes

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

3 Scopus Citations
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Author(s)

  • Yingying Xie
  • Han Gao
  • Ross Harder
  • Linsen Li
  • Jihyeon Gim
  • Haiying Che
  • Hong Wang
  • Xiaoyi Zhang
  • Luxi Li
  • Zonghai Chen
  • Khalil Amine
  • Zi-Feng Ma

Detail(s)

Original languageEnglish
Pages (from-to)6107-6114
Journal / PublicationACS Applied Energy Materials
Volume3
Issue number7
Online published19 Jun 2020
Publication statusPublished - 27 Jul 2020
Externally publishedYes

Abstract

O-type layered oxide cathode materials can be easily synthesized for a full sodium stoichiometry with high specific capacity, but they all suffer from a capacity fade on cycling. The sintering process control and optimization are critical to ensure a high quality and consistency of the prepared cathode materials with stable structure. Herein, in situ high-energy X-ray diffraction (HEXRD) was first employed to investigate the phase evolution of the oxides during the sintering process of O3-type NaNi1/3Fe1/3Mn1/3O2. The in situ HEXRD and both operando Bragg coherent diffraction (BCXD) and coherent multicrystal diffraction (CMCD) were utilized to investigate the phase transformation of the cathode materials during the sodiation/desodiation process. A composite structure comprised of O-type and P-type oxides was formed after the initial electrochemical activation of the cathode material, resulting in good structural and electrochemical stability. This finding implies that strain engineering can be a new design philosophy for the development of next generation high-performance sodium ion cathodes.

Research Area(s)

  • cathode material, in situ X-ray diffraction, phase transformation, sintering process, sodium ion battery

Citation Format(s)

Revealing the Structural Evolution and Phase Transformation of O3-Type NaNi1/3Fe1/3Mn1/3OCathode Material on Sintering and Cycling Processes. / Xie, Yingying; Gao, Han; Harder, Ross; Li, Linsen; Gim, Jihyeon; Che, Haiying; Wang, Hong; Ren, Yang; Zhang, Xiaoyi; Li, Luxi; Chen, Zonghai; Amine, Khalil; Ma, Zi-Feng.

In: ACS Applied Energy Materials, Vol. 3, No. 7, 27.07.2020, p. 6107-6114.

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