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Towards Reversible and Moisture Tolerant Aprotic Lithium-Air Batteries

preprint
submitted on 30.04.2020 and posted on 05.05.2020 by Israel Temprano, Tao Liu, Enrico Petrucco, James H. J. Ellison, Gunwoo Kim, Erlendur Jónsson, Clare P. Grey
The development of moisture-tolerant, LiOH-based non-aqueous Li-O2 batteries is a promising route to bypassing the inherent limitations caused by the instability of their typical discharge products, LiO2 and Li2O2. The use of the I-/I3- redox couple to mediate the LiOH-based oxygen reduction and oxidation reactions has proven challenging to develop due to the multiple reaction paths induced by the oxidation of I- on cell charging. In this work we demonstrate a reversible LiOH-based Li-O2 battery cycling through a 4 e-/O2 process with low charging overpotential (below 3.5 V vs Li/Li+) by introducing an ionic liquid to a glyme-based electrolyte containing LiI and water. The addition to the ionic liquid increases the oxidizing power of I3-, shifting the charging mechanism from IO-/IO3- formation to O2 evolution
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Funding

Innovate UK (132220)

EPSRC (EP/M009521/1 DJR00640)

History

Email Address of Submitting Author

it251@cam.ac.uk

Institution

University of Cambridge

Country

United Kingdom

ORCID For Submitting Author

0000-0001-5610-8908

Declaration of Conflict of Interest

A version of this article is being under peer review for publication elsewhere.

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