Rational design of mechanically robust Ni-rich cathode materials via concentration gradient strategy

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

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Author(s)

  • Tongchao Liu
  • Lei Yu
  • Jun Lu
  • Tao Zhou
  • Xiaojing Huang
  • Zhonghou Cai
  • Alvin Dai
  • Jihyeon Gim
  • Xianghui Xiao
  • Martin V. Holt
  • Yong S. Chu
  • Ilke Arslan
  • Jianguo Wen
  • Khalil Amine

Detail(s)

Original languageEnglish
Article number6024
Journal / PublicationNature Communications
Volume12
Online published15 Oct 2021
Publication statusPublished - 1 Dec 2021
Externally publishedYes

Link(s)

Abstract

Mechanical integrity issues such as particle cracking are considered one of the leading causes of structural deterioration and limited long-term cycle stability for Ni-rich cathode materials of Li-ion batteries. Indeed, the detrimental effects generated from the crack formation are not yet entirely addressed. Here, applying physicochemical and electrochemical ex situ and in situ characterizations, the effect of Co and Mn on the mechanical properties of the Ni-rich material are thoroughly investigated. As a result, we successfully mitigate the particle cracking issue in Ni-rich cathodes via rational concentration gradient design without sacrificing the electrode capacity. Our result reveals that the Co-enriched surface design in Ni-rich particles benefits from its low stiffness, which can effectively suppress the formation of particle cracking. Meanwhile, the Mn-enriched core limits internal expansion and improve structural integrity. The concentration gradient design also promotes morphological stability and cycling performances in Li metal coin cell configuration.

Research Area(s)

Citation Format(s)

Rational design of mechanically robust Ni-rich cathode materials via concentration gradient strategy. / Liu, Tongchao; Yu, Lei; Lu, Jun et al.
In: Nature Communications, Vol. 12, 6024, 01.12.2021.

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

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