Doping effect of fluoride anion on microstructural and electrochemical properties of lithium-rich cathode materials

Dazhi Xie, Weishan Zhou, Kangshou Lin, Chen Hu, Peiming Zheng, Xianhua Hou, Kwok ho Lam

Research output: Journal article publicationJournal articleAcademic researchpeer-review

10 Citations (Scopus)

Abstract

At present, the lithium-rich metal oxide Li1+zMO2 (M = Ni, Co, Mn, etc.) is one of the promising cathodes materials for high-energy lithium-ion batteries. In this work, we report the effect of different doping amounts of fluoride ions on the microstructural and electrochemical properties of Li[Li0.2Mn0.54Ni0.13Co0.13]O2 cathode material. At low doping levels, the fluoride ions substituted the oxygen ions. When the doped fluorine was more than the theoretical limit of x = 0.15, LiF-based material was attached on the surface of the material, offering better cycling performance of battery. With the doping effect, a discharge capacity of 230 mAh/g and a capacity retention rate of 98% were found respectively, which are better than the pristine electrode.

Original languageEnglish
Pages (from-to)82-85
Number of pages4
JournalMaterials Letters
Volume253
DOIs
Publication statusPublished - 15 Oct 2019

Keywords

  • Crystal growth
  • Cycling performance
  • Energy storage and conversion
  • Fluoride anion doping
  • Li-rich cathode

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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