Iron-oxalato framework with one-dimensional open channels for electrochemical sodium-ion intercalation

Xianfen Wang, Ryosuke Kurono, Shin Ichi Nishimura, Masashi Okubo, Atsuo Yamada*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)


Discovery of a new class of ion intercalation compounds is highly desirable due to its relevance to various electrochemical devices, such as batteries. Herein, we present a new iron-oxalato open framework, which showed reversible Na+ intercalation/extraction. The hydrothermally synthesized K4Na2[Fe(C2O4)2]3·2H2O possesses one-dimensional open channels in the oxalato-bridged network, providing ion accessibility up to two Na+ per the formula unit. The detailed studies on the structural and electronic states revealed that the framework exhibited a solid solution state almost entirely during Na+ intercalation/extraction associated with the reversible redox of Fe. The present work demonstrates possibilities of the oxalato frameworks as tunable and robust ion intercalation electrode materials for various device applications.

Original languageEnglish
Pages (from-to)1096-1101
Number of pages6
JournalChemistry - A European Journal
Issue number3
Publication statusPublished - 2015 Jan 12
Externally publishedYes


  • Electrochemistry
  • Metal-organic frameworks
  • Mössbauer spectroscopy
  • Oxalates
  • Sodium-ion batteries

ASJC Scopus subject areas

  • Catalysis
  • Organic Chemistry


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