Analysis of the discharge/charge mechanism in VS4 positive electrode material

Kazuto Koganei, Atsushi Sakuda, Tomonari Takeuchi, Hikari Sakaebe, Hironori Kobayashi, Hiroyuki Kageyama, Tomoya Kawaguchi, Hisao Kiuchi, Koji Nakanishi, Masashi Yoshimura, Toshiaki Ohta, Toshiharu Fukunaga, Eiichiro Matsubara

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Among transition metal sulfides, VS4 is a promising candidate material for the positive electrode in rechargeable Li/metal-sulfide batteries, due to its long, flat plateau at about 2.0 V and its high theoretical capacity (1195 mAh g−1). In this study, we prepared VS4 positive electrode material by heating in a sealed tube, and studied local structural changes during charge/discharge cycles via X-ray absorption and scattering spectroscopies, focusing on the reversibility of VS4. The findings reveal that a VS4-like local structure was formed in the first cycle, and that subsequent cycles showed reversible changes.

Original languageEnglish
Pages (from-to)32-36
Number of pages5
JournalSolid State Ionics
Volume323
DOIs
Publication statusPublished - Oct 1 2018
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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