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Na0.67Mn1-xMgxO2 (0 <= x <= 0.2): a high capacity cathode for sodium-ion batteries

Authors

Billaud,  J.
External Organizations;

Singh,  G.
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Armstrong,  A. R.
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Gonzalo,  E.
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/persons/resource/roddatis

Roddatis,  Vladimir       
0 Pre-GFZ, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Armand,  M.
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Rojob,  T.
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Bruce,  P. G.
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Citation

Billaud, J., Singh, G., Armstrong, A. R., Gonzalo, E., Roddatis, V., Armand, M., Rojob, T., Bruce, P. G. (2014): Na0.67Mn1-xMgxO2 (0 <= x <= 0.2): a high capacity cathode for sodium-ion batteries. - Energy and Environmental Science, 7, 1387-1391.
https://doi.org/10.1039/c4ee00465e


Cite as: https://gfzpublic.gfz.de/pubman/item/item_4693920
Abstract
Earth-abundant Na-0.67[Mn1-xMgx] O-2 (0 <= x <= 0.2) cathode materials with the P2 structure have been synthesized as positive electrodes for sodium-ion batteries. Na0.67MnO2 exhibits a capacity of 175 mA h g(-1) with good capacity retention. A Mg content of 5% is sufficient to smooth the charge/ discharge profiles without affecting the capacity, whilst further increasing the Mg content improves the cycling stability, but at the expense of a lower discharge capacity (150 mA h g(-1) for Na0.67Mn0.8Mg0.2O2). It was observed that the cooling process during synthesis, as well as Mg content, have an influence on the structure.