Please use this identifier to cite or link to this item: https://doi.org/10.1038/ncomms14308
Title: Proton enhanced dynamic battery chemistry for aprotic lithium-oxygen batteries
Authors: Zhu, Y.G
Liu, Q
Rong, Y
Chen, H
Yang, J 
Jia, C 
Yu, L.-J
Karton, A
Ren, Y
Xu, X
Adams, S 
Wang, Q 
Keywords: lithium
oxygen
proton
electron
hydroxide
iodide
lithium
oxygen
solvent
water pollution
Article
chemical reaction
crystal structure
electric battery
electrochemical analysis
kinetics
water contamination
Issue Date: 2017
Publisher: Nature Publishing Group
Citation: Zhu, Y.G, Liu, Q, Rong, Y, Chen, H, Yang, J, Jia, C, Yu, L.-J, Karton, A, Ren, Y, Xu, X, Adams, S, Wang, Q (2017). Proton enhanced dynamic battery chemistry for aprotic lithium-oxygen batteries. Nature Communications 8 : 14308. ScholarBank@NUS Repository. https://doi.org/10.1038/ncomms14308
Abstract: Water contamination is generally considered to be detrimental to the performance of aprotic lithium-air batteries, whereas this view is challenged by recent contrasting observations. This has provoked a range of discussions on the role of water and its impact on batteries. In this work, a distinct battery chemistry that prevails in water-contaminated aprotic lithium-oxygen batteries is revealed. Both lithium ions and protons are found to be involved in the oxygen reduction and evolution reactions, and lithium hydroperoxide and lithium hydroxide are identified as predominant discharge products. The crystallographic and spectroscopic characteristics of lithium hydroperoxide monohydrate are scrutinized both experimentally and theoretically. Intriguingly, the reaction of lithium hydroperoxide with triiodide exhibits a faster kinetics, which enables a considerably lower overpotential during the charging process. The battery chemistry unveiled in this mechanistic study could provide important insights into the understanding of nominally aprotic lithium-oxygen batteries and help to tackle the critical issues confronted. © 2017 The Author(s).
Source Title: Nature Communications
URI: https://scholarbank.nus.edu.sg/handle/10635/174435
ISSN: 2041-1723
DOI: 10.1038/ncomms14308
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