Cation-Disordered Li3VO4: Reversible Li Insertion/Deinsertion Mechanism for Quasi Li-Rich Layered Li1+ x[V1/2Li1/2]O2 (x = 0-1)

Patrick Rozier, Etsuro Iwama, Nagare Nishio, Kazuhisa Baba, Keisuke Matsumura, Kazuaki Kisu, Junichi Miyamoto, Wako Naoi, Yuki Orikasa, Patrice Simon, Katsuhiko Naoi

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The reversible lithiation/delithiation mechanism of the cation-disordered Li3VO4 material was elucidated, including the understanding of structural and electrochemical signature changes during cycling. The initial exchange of two Li induces a progressive and irreversible 7migration of Li and V ions from tetrahedral to octahedral sites, confirmed by the combination of in situ/operando X-ray diffraction and X-ray absorption fine structure analyses. The resulting cation-disordered Li3VO4 can smoothly and reversibly accommodate two Li and shows a Li+ diffusion coefficient larger by 2 orders of magnitude than the one of pristine Li3VO4, leading to improved electrochemical performance. This cation-disordered Li3VO4 negative electrode offers new opportunities for designing high-energy and high-power supercapacitors. Furthermore, it opens new paths for preparing disordered compounds with the general hexagonal close-packing structure, including most polyanionic compounds, whose electrochemical performance can be easily improved by simple cation mixing.

Original languageEnglish
Pages (from-to)4926-4934
Number of pages9
JournalChemistry of Materials
Volume30
Issue number15
DOIs
Publication statusPublished - 2018 Aug 14
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Cation-Disordered Li<sub>3</sub>VO<sub>4</sub>: Reversible Li Insertion/Deinsertion Mechanism for Quasi Li-Rich Layered Li<sub>1+ x</sub>[V<sub>1/2</sub>Li<sub>1/2</sub>]O<sub>2</sub> (x = 0-1)'. Together they form a unique fingerprint.

  • Cite this

    Rozier, P., Iwama, E., Nishio, N., Baba, K., Matsumura, K., Kisu, K., Miyamoto, J., Naoi, W., Orikasa, Y., Simon, P., & Naoi, K. (2018). Cation-Disordered Li3VO4: Reversible Li Insertion/Deinsertion Mechanism for Quasi Li-Rich Layered Li1+ x[V1/2Li1/2]O2 (x = 0-1). Chemistry of Materials, 30(15), 4926-4934. https://doi.org/10.1021/acs.chemmater.8b00721