Iron–Oxalato Framework with One‐Dimensional Open Channels for Electrochemical Sodium‐Ion Intercalation. Issue 3 (17th November 2014)

• Record Type: Journal Article
• Authors: Wang, Xianfen; Kurono, Ryosuke; Nishimura, Shin‐ichi; Okubo, Masashi; Yamada, Atsuo
• Is Part Of: Chemistry. Volume 21:Issue 3(2015)
• Page Start: 1096
• Page End: 1101
• Publication Date: 2014-11-17
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201404929
• Languages: English
• ISSNs: 0947-6539

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>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<bold>⋅</bold>2 H₂O 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.</p> </abstract>