Multiscale Understanding of Surface Structural Effects on High-Temperature Operational Resiliency of Layered Oxide Cathodes

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Xiang Liu
  • Xinwei Zhou
  • Qiang Liu
  • Jiecheng Diao
  • Chen Zhao
  • Luxi Li
  • Yuzi Liu
  • Wenqian Xu
  • Amine Daali
  • Ross Harder
  • Ian K. Robinson
  • Mouad Dahbi
  • Jones Alami
  • Gui-Liang Xu
  • Khalil Amine

Detail(s)

Original languageEnglish
Article number2107326
Journal / PublicationAdvanced Materials
Volume34
Issue number4
Online published26 Oct 2021
Publication statusPublished - 27 Jan 2022
Externally publishedYes

Abstract

The worldwide energy demand in electric vehicles and the increasing global temperature have called for development of high-energy and long-life lithium-ion batteries (LIBs) with improved high-temperature operational resiliency. However, current attention has been mostly focused on cycling aging at elevated temperature, leaving considerable gaps of knowledge in the failure mechanism, and practical control of abusive calendar aging and thermal runaway that are highly related to the eventual operational lifetime and safety performance of LIBs. Herein, using a combination of various in situ synchrotron X-ray and electron microscopy techniques, a multiscale understanding of surface structure effects involved in regulating the high-temperature operational tolerance of polycrystalline Ni-rich layered cathodes is reported. The results collectively show that an ultraconformal poly(3,4-ethylenedioxythiophene) coating can effectively prevent a LiNi0.8Co0.1Mn0.1O2 cathode from undergoing undesired phase transformation and transition metal dissolution on the surface, atomic displacement, and dislocations within primary particles, intergranular cracking along the grain boundaries within secondary particles, and intensive bulk oxygen release during high state-of-charge and high-temperature aging. The present work highlights the essential role of surface structure controls in overcoming the multiscale degradation pathways of high-energy battery materials at extreme temperature.

Citation Format(s)

Multiscale Understanding of Surface Structural Effects on High-Temperature Operational Resiliency of Layered Oxide Cathodes. / Liu, Xiang; Zhou, Xinwei; Liu, Qiang et al.
In: Advanced Materials, Vol. 34, No. 4, 2107326, 27.01.2022.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review