A new electrode material for rechargeable sodium batteries: P2-type Na2/3[Mg0.28Mn0.72]O2 with anomalously high reversible capacity

Naoaki Yabuuchi; Ryo Hara; Kei Kubota; Jens Paulsen; Shinichi Kumakura; Shinichi Komaba

doi:10.1039/C4TA04351K

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A new electrode material for rechargeable sodium batteries: P2-type Na_2/3[Mg_0.28Mn_0.72]O₂ with anomalously high reversible capacity†

Naoaki Yabuuchi,^ab Ryo Hara,^a Kei Kubota,^ab Jens Paulsen,^c Shinichi Kumakura^d and Shinichi Komaba*^ab

Author affiliations

* Corresponding authors

^a Department of Applied Chemistry, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku, Tokyo 162-8601, Japan
E-mail: komaba@rs.kagu.tus.ac.jp

^b Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Katsura, Kyoto, Japan

^c Umicore Korea Limited, 401, Chaam-dong, Cheonan, Chungnam, Korea

^d Umicore Japan KK, Kobe Plant, 4-2-8 Minami-machi, Minatojima, Chuo-ku, Kobe, Japan

Abstract

P2-type Na_2/3[Mg_0.28Mn_0.72]O₂ is prepared and electrode performance in Na cells is first provided. The sample surprisingly delivers a large reversible capacity (220 mA h g⁻¹) even though electrochemically inactive magnesium ions are enriched in the host structure. This new electrode material is potentially utilized for rechargeable batteries made from only earth-abundant elements.

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Article information

DOI: https://doi.org/10.1039/C4TA04351K
Article type: Communication
Submitted: 22 Aug 2014
Accepted: 22 Aug 2014
First published: 26 Aug 2014

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J. Mater. Chem. A, 2014,2, 16851-16855

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A new electrode material for rechargeable sodium batteries: P2-type Na_2/3[Mg_0.28Mn_0.72]O₂ with anomalously high reversible capacity

N. Yabuuchi, R. Hara, K. Kubota, J. Paulsen, S. Kumakura and S. Komaba, J. Mater. Chem. A, 2014, 2, 16851 DOI: 10.1039/C4TA04351K

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Journal of Materials Chemistry A