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Electrochemical Properties of Monoclinic NaNiO2

Author(s)
Vassilaras, Plousia E.; Ma, Xiaohua; Li, Xin; Ceder, Gerbrand
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.

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Abstract
Monoclinic NaNiO[subscript 2] is re-investigated as a positive electrode material for sodium ion batteries. We observe reversible Na extraction and insertion of about 120 mAh/g when NaNiO[subscript 2] is cycled between 1.25 V and 3.75 V, though discharge only proceeds to Na0.91NiO[subscript 2]. The voltage profile shows large and pronounced steps, which are fully reversible. Charging to 4.5 V leads to higher charge and discharge capacity, though with poor coulombic efficiency and rapid capacity fade. X-ray diffraction of charged samples indicates that high voltage charging leads to the formation of an inactive phase.
Date issued
2012-11
URI
http://hdl.handle.net/1721.1/82533
Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Journal
Journal of the Electrochemical Society
Publisher
Electrochemical Society
Citation
Vassilaras, P., X. Ma, X. Li, and G. Ceder. Electrochemical Properties of Monoclinic NaNiO2. Journal of the Electrochemical Society 160, no. 2 (November 28, 2012): A207-A211.© 2012 The Electrochemical Society.
Version: Final published version
ISSN
0013-4651
1945-7111

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