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Issue 33, 2014
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Water sensitivity of layered P2/P3-NaxNi0.22Co0.11Mn0.66O2 cathode material

Daniel Buchholz,abc  Luciana Gomes Chagas,abc  Christoph Vaalma,abc  Liming Wuabc  and  Stefano Passerini*abc 
Author affiliations

* Corresponding authors

a University of Muenster, Institute of Physical Chemistry, Corrensstraße 46, 48149 Muenster, Germany
E-mail: stefano.passerini@kit.edu

b Helmholtz Institute Ulm (HIU) Electrochemistry Ic, Albert-Einstein-Allee 11, 89081 Ulm, Germany

c Karlsruhe Institute of Technology (KIT), PO Box 3640, 76021 Karlsruhe, Germany

Abstract

Sodium-based layered oxides undergo several structural changes upon the (de-)sodiation process and reveal a strong tendency towards water intercalation at lower sodium contents. However, valuable information about their handling during the investigation are still rare. Herein, we report an investigation of the water sensitivity of layered NaxNi0.22Co0.11Mn0.66O2 with mixed P2/P3 structure via X-ray diffraction. At lower sodium contents, i.e. below x ≈ 0.33 or above 3.6 V vs. Na/Na+, a strong tendency for the uptake of water is observed, supported by the appearance of new diffraction peaks confirming a dramatically increased interlayer distance. However, at high sodium content (x > 0.33) the material can be processed in open air without major changes.

Graphical abstract: Water sensitivity of layered P2/P3-NaxNi0.22Co0.11Mn0.66O2 cathode material

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Publication details

The article was received on 26 May 2014, accepted on 22 Jun 2014 and first published on 25 Jun 2014


Article type: Paper
DOI: 10.1039/C4TA02627F
Author version available: Download Author version (PDF)
Citation: J. Mater. Chem. A, 2014,2, 13415-13421
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    Water sensitivity of layered P2/P3-NaxNi0.22Co0.11Mn0.66O2 cathode material

    D. Buchholz, L. G. Chagas, C. Vaalma, L. Wu and S. Passerini, J. Mater. Chem. A, 2014, 2, 13415
    DOI: 10.1039/C4TA02627F

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