High Rate Li-Ion Batteries with Cation-Disordered Cathodes

Minkyu Kim, Donghoon Kim, Yuren Wen, Minkyung Kim, Hyun Myung Jang, Hong Li, Lin Gu, Byoungwoo Kang

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

We report a new class of cation-disordered material that can achieve reasonable Li diffusion by controlling the way of the cation distribution rather than the degree of cation disordering itself. The fully cation-disordered LiFeSO 4 F, activated by changes in the synthesis temperature and the Li/Fe ratio, delivers a substantially improved electrochemical performance. It exhibits a superior rate capability up to 100 C (36-s discharge) with ∼ 60 mAh/g and excellent capacity retention for 2,500 cycles at 5 C charge/20 C discharge rate. These results extend the scope of electrode materials to include cation-disordered materials and provide new opportunities for designing them for high-performance Li-ion batteries.

Original languageEnglish
Pages (from-to)1064-1079
Number of pages16
JournalJoule
Volume3
Issue number4
DOIs
StatePublished - 17 Apr 2019
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2019 Elsevier Inc.

Keywords

  • cation-disordered cathode material
  • cation-disordering
  • high-rate cathodes with cation-disordered cathodes
  • new activation mechanism
  • new type of cation-disordered compounds
  • the way of disordered cation distribution
  • triplite LiFeSO F
  • unlocking the potential of cation-disordered cathodes

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