Structure analyses of Fe-substituted Li2S-based positive electrode materials for Li-S batteries

Tomonari Takeuchi, Hiroyuki Kageyama, Noboru Taguchi, Koji Nakanishi, Tomoya Kawaguchi, Koji Ohara, Katsutoshi Fukuda, Atsushi Sakuda, Toshiaki Ohta, Toshiharu Fukunaga, Hikari Sakaebe, Hironori Kobayashi, Eiichiro Matsubara

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The structure of Fe-substituted Li2S-based positive electrode material Li8FeS5 was analyzed using high-energy X-ray total scattering measurements. Pair distribution function (PDF) analyses indicated that the mechanically milled Li8FeS5 sample could best be described as having an anti-fluorite structure in which Fe ions partially occupy Li sites in the Fm3¯m unit cell. The electrochemical properties of a cell utilizing Li8FeS5 as the positive electrode were also consistent with this structural model.

Original languageEnglish
Pages (from-to)387-391
Number of pages5
JournalSolid State Ionics
Volume320
DOIs
Publication statusPublished - 2018 Jul
Externally publishedYes

Keywords

  • Fe-substituted lithium sulfide
  • High capacity
  • Lithium sulfur battery
  • Low crystalline material
  • Pair distribution function analysis

ASJC Scopus subject areas

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

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    Takeuchi, T., Kageyama, H., Taguchi, N., Nakanishi, K., Kawaguchi, T., Ohara, K., Fukuda, K., Sakuda, A., Ohta, T., Fukunaga, T., Sakaebe, H., Kobayashi, H., & Matsubara, E. (2018). Structure analyses of Fe-substituted Li2S-based positive electrode materials for Li-S batteries. Solid State Ionics, 320, 387-391. https://doi.org/10.1016/j.ssi.2018.03.028