Off-Stoichiometry in Alluaudite-Type Sodium Iron Sulfate Na2+2xFe2-x(SO4)3 as an Advanced Sodium Battery Cathode Material

Gosuke Oyama, Shin ichi Nishimura, Yuya Suzuki, Masashi Okubo, Atsuo Yamada*

*この研究の対応する著者

研究成果: Article査読

96 被引用数 (Scopus)

抄録

An alluaudite-type sodium iron sulfate has recently been discovered as a 3.8V cathode material for low-cost, high-power, and efficient sodium-ion batteries. To optimize the composition of the alluaudite phase and to explore further compounds, we have carefully surveyed the Na2SO4-FeSO4 binary system. Solid-state reactions at a moderate temperature of 623K produce two stable phases: 1)vanthoffite-structured Na6Fe(SO4)4 and 2)alluaudite-type Na2+2xFe2-x(SO4)3 with a certain non-stoichiometry. The possible compositional and structural flexibilities demonstrated in this work inspire further improvement of the alluaudite-type sodium metal sulfates for advanced sodium-ion batteries.

本文言語English
ページ(範囲)1019-1023
ページ数5
ジャーナルChemElectroChem
2
7
DOI
出版ステータスPublished - 2015 7月 15
外部発表はい

ASJC Scopus subject areas

  • 触媒
  • 電気化学

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