Revealing the Structural Evolution and Phase Transformation of O3-Type NaNi1/3Fe1/3Mn1/3O2 Cathode Material on Sintering and Cycling Processes
Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
Author(s)
Detail(s)
Original language | English |
---|---|
Pages (from-to) | 6107-6114 |
Journal / Publication | ACS Applied Energy Materials |
Volume | 3 |
Issue number | 7 |
Online published | 19 Jun 2020 |
Publication status | Published - 27 Jul 2020 |
Externally published | Yes |
Link(s)
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 NaNi1/3Fe1/3Mn1/3O2 Cathode Material on Sintering and Cycling Processes. / Xie, Yingying; Gao, Han; Harder, Ross et al.
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 journal › peer-review