Issue 33, 2014

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

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

Supplementary files

Article information

Article type
Paper
Submitted
26 May 2014
Accepted
22 Jun 2014
First published
25 Jun 2014

J. Mater. Chem. A, 2014,2, 13415-13421

Author version available

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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