Synthesis of full concentration gradient cathode studied by high energy X-ray diffraction

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

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Author(s)

  • Yan Li
  • Rui Xu
  • Jun Lu
  • Huiming Wu
  • Lifen Wang
  • Dean J. Miller
  • Yang-Kook Sun
  • Khalil Amine
  • Zonghai Chen

Detail(s)

Original languageEnglish
Pages (from-to)522-531
Journal / PublicationNano Energy
Volume19
Publication statusPublished - 1 Jan 2016
Externally publishedYes

Abstract

Nickel-rich metal oxides have been widely pursued as promising cathode materials for high energy-density lithium-ion batteries. Nickel-rich lithium transition metal oxides can deliver a high specific capacity during cycling, but can react with non-aqueous electrolytes. In this work, we have employed a full concentration gradient (FCG) design to provide a nickel-rich core to deliver high capacity and a manganese-rich outer layer to provide enhanced stability and cycle life. In situ high-energy X-ray diffraction was utilized to study the structural evolution of oxides during the solid-state synthesis of FCG lithium transition metal oxide with a nominal composition of LiNi0.6Mn0.2Co0.2O2. We found that both the pre-heating step and the sintering temperature were critical in controlling phase separation of the transition metal oxides and minimizing the content of Li2CO3 and NiO, both of which deteriorate the electrochemical performance of the final material. The insights revealed in this work can also be utilized for the design of other nickel-rich high energy-density cathode materials.

Research Area(s)

  • Full concentration gradient cathode, In situ XRD, Lithium ion battery

Bibliographic Note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to lbscholars@cityu.edu.hk.

Citation Format(s)

Synthesis of full concentration gradient cathode studied by high energy X-ray diffraction. / Li, Yan; Xu, Rui; Ren, Yang; Lu, Jun; Wu, Huiming; Wang, Lifen; Miller, Dean J.; Sun, Yang-Kook; Amine, Khalil; Chen, Zonghai.

In: Nano Energy, Vol. 19, 01.01.2016, p. 522-531.

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