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Anionic redox chemistry in Na-rich Na2Ru1−ySnyO3 positive electrode material for Na-ion batteries

Rozier, Patrick and Sathiya, Mariyappan and Paulraj, Alagar-Raj and Foix, Dominique and Desaunay, Thomas and Taberna, Pierre-Louis and Simon, Patrice and Tarascon, Jean-Marie Anionic redox chemistry in Na-rich Na2Ru1−ySnyO3 positive electrode material for Na-ion batteries. (2015) Electrochemistry Communications, 53. 29-32. ISSN 1388-2481

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Official URL: http://dx.doi.org/10.1016/j.elecom.2015.02.001

Abstract

The synthesis and Na- electrochemical activity of Na-rich layered Na2Ru1−ySnyO3 compounds is reported. Like their Li-analogue, Na2Ru1−ySnyO3 shows capacities that exceed theoretical capacity calculated from the cationic redox species. The high capacity was found, by means of XPS analysis, to be associated to the accumulation of both cationic (Ru4+/Ru5+) and anionic (O2−/O2n−) redox processes. The structural evolutions during cycling have been followed and found to be associated with the cation disordering and loss of crystallinity on cycling.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com
HAL Id:hal-01419538
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Collège de France (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Other partners > Université Pierre et Marie Curie, Paris 6 - UPMC (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Université de Pau et des Pays de l'Adour - UPPA (FRANCE)
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Deposited By: cirimat webmestre
Deposited On:19 Dec 2016 14:59

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