O3-type layer-structured Na0.8[Ni1/5Fe1/5Co1/5Mn1/5Ti1/5]O2 as long life and high power cathode material for sodium-ion batteries

Daniel A. Anang, Jae Ho Park, Deu S. Bhange, Min K. Cho, Woo Y. Yoon, Kyung Y. Chung, Kyung Wan Nam

Research output: Contribution to journalArticle

Abstract

O3-type layer-structured Na0 . 8[Ni1/5Fe1/5Co1/5Mn1/5Ti1/5]O2 (denoted as N0.8NFCMTO) has been investigated as a new cathode material for Na-ion batteries. The N0.8NFCMTO cathode delivers an initial discharge capacity of 107 mAhg−1 with excellent cycling stability of over 90% capacity retention after 100 cycles. This material delivers comparable capacity to that of previously reported layered cathode materials with multi-transition metal elements while showing an excellent rate capability and stable long cycle life. Synchrotron-based in situ X-ray diffraction and ex situ X-ray absorption spectroscopy investigations combined with quantitative refinement analysis reveal the reversible structural changes and charge compensation mechanism during sodium extraction/insertion, which is associated with the excellent cycling stability of the N0.8NFCMTO electrode.

Original languageEnglish
Pages (from-to)23164-23171
Number of pages8
JournalCeramics International
Volume45
Issue number17
DOIs
Publication statusPublished - 2019 Dec 1

Keywords

  • Cathode
  • In situ x-ray diffraction
  • Layer-structured oxide
  • Sodium-ion battery
  • X-ray absorption spectroscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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