Facile formation of a Li3PO4 coating layer during the synthesis of a lithium-rich layered oxide for high-capacity lithium-ion batteries

Yongho Lee, Jieun Lee, Kwan Young Lee, Junyoung Mun, Joong Kee Lee, Wonchang Choi

Research output: Contribution to journalArticlepeer-review

51 Citations (Scopus)

Abstract

The facile surface modification of transition-metal hydroxide precursors with ammonium dihydrogen phosphate was performed by ball-milling before the calcination process. The prepared precursors were mixed with the required amount of lithium hydroxide and then simply calcined to obtain lithium-phosphate-coated lithium transition metal oxide cathodes during the one-pot calcination process. A thin, homogeneous Li3PO4 coating is firstly formed on the surface of the precursor owing to the abundance of lithium at a lower-temperature range, and subsequent formation of lithium transition metal oxide is achieved at a higher-temperature range during the calcination process. The Li3PO4-coated cathode electrode with the high loading level over 12 mg cm−1 exhibits a discharge capacity of 106 mAh g−1 at 5C at ambient temperature. Furthermore, it delivers 90% capacity retention after 50 cycles at 60 °C.

Original languageEnglish
Pages (from-to)284-293
Number of pages10
JournalJournal of Power Sources
Volume315
DOIs
Publication statusPublished - 2016 May 31

Keywords

  • Cathode
  • Coating layer
  • Lithium phosphate
  • Lithium-ion battery
  • Lithium-rich layered oxide
  • Surface modification

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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