Revealing instability and irreversibility in nonaqueous sodium–O2 battery chemistry

Sayed Youssef Sayed; Koffi P. C. Yao; David G. Kwabi; Thomas P. Batcho; Chibueze V. Amanchukwu; Shuting Feng; Carl V. Thompson; Yang Shao-Horn

doi:10.1039/C6CC02291J

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Revealing instability and irreversibility in nonaqueous sodium–O₂ battery chemistry†

Sayed Youssef Sayed,‡^a Koffi P. C. Yao,^b David G. Kwabi,^b Thomas P. Batcho,^c Chibueze V. Amanchukwu,^d Shuting Feng,^d Carl V. Thompson^c and Yang Shao-Horn*^abc

Author affiliations

* Corresponding authors

^a The Research Laboratory of Electronics and the Electrochemical Energy Laboratory, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
E-mail: shaohorn@mit.edu

^b Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA

^c Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA

^d Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA

Abstract

Charging kinetics and reversibility of Na–O₂ batteries can be influenced greatly by the particle size of NaO₂ formed upon discharge, and exposure time (reactivity) of NaO₂ to the electrolyte. Micrometer-sized NaO₂ cubes formed at high discharge rates were charged at smaller overpotentials compared to nanometer-sized counterparts formed at low rates.

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Article information

DOI: https://doi.org/10.1039/C6CC02291J
Article type: Communication
Submitted: 16 Mar 2016
Accepted: 03 Jul 2016
First published: 04 Jul 2016

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Chem. Commun., 2016,52, 9691-9694

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Revealing instability and irreversibility in nonaqueous sodium–O₂ battery chemistry

S. Y. Sayed, K. P. C. Yao, D. G. Kwabi, T. P. Batcho, C. V. Amanchukwu, S. Feng, C. V. Thompson and Y. Shao-Horn, Chem. Commun., 2016, 52, 9691 DOI: 10.1039/C6CC02291J

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