Interfacial Design for a 4.6 V High-Voltage Single-Crystalline LiCoO2 Cathode

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

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Author(s)

  • Jiaxun Zhang
  • Peng-Fei Wang
  • Panxing Bai
  • Hongli Wan
  • Sufu Liu
  • Singyuk Hou
  • Xiangjun Pu
  • Jiale Xia
  • Weiran Zhang
  • Zeyi Wang
  • Bo Nan
  • Xiyue Zhang
  • Chunsheng Wang

Detail(s)

Original languageEnglish
Article number2108353
Journal / PublicationAdvanced Materials
Volume34
Issue number8
Online published8 Dec 2021
Publication statusPublished - 24 Feb 2022
Externally publishedYes

Abstract

Single-crystalline cathode materials have attracted intensive interest in offering greater capacity retention than their polycrystalline counterparts by reducing material surfaces and phase boundaries. However, the single-crystalline LiCoO2 suffers severe structural instability and capacity fading when charged to high voltages (4.6 V) due to Co element dissolution and O loss, crack formation, and subsequent electrolyte penetration. Herein, by forming a robust cathode electrolyte interphase (CEI) in an all-fluorinated electrolyte, reversible planar gliding along the (003) plane in a single-crystalline LiCoO2 cathode is protected due to the prevention of element dissolution and electrolyte penetration. The robust CEI effectively controls the performance fading issue of the single-crystalline cathode at a high operating voltage of 4.6 V, providing new insights for improved electrolyte design of high-energy-density battery cathode materials. © 2022 Wiley-VCH GmbH

Research Area(s)

  • high-voltage LiCoO 2 cathodes, inorganic-rich cathode electrolyte interphase, nonflammable electrolytes, single-crystalline cathodes

Citation Format(s)

Interfacial Design for a 4.6 V High-Voltage Single-Crystalline LiCoO2 Cathode. / Zhang, Jiaxun; Wang, Peng-Fei; Bai, Panxing et al.
In: Advanced Materials, Vol. 34, No. 8, 2108353, 24.02.2022.

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