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Type: Journal article
Title: Boosting Zn electrode reversibility in aqueous electrolyte using low-cost antisolvents
Author: Hao, J.
Yuan, L.
Ye, C.
Chao, D.
Davey, K.
Guo, Z.
Qiao, S.
Citation: Angewandte Chemie International Edition, 2021; 60(13):7366-7375
Publisher: John Wiley and Sons Inc
Issue Date: 2021
ISSN: 1433-7851
Statement of
Junnan Hao, Libei Yuan, Chao Ye, Dongliang Chao, Kenneth Davey, Zaiping Guo, Shi‐Zhang Qiao
Abstract: Antisolvent addition has been widely studied in crystallization in the pharmaceutical industries by breaking the solvation balance of the original solution. Here we report a similar antisolvent strategy to boost Zn reversibility via regulation of the electrolyte on a molecular level. By adding for example methanol into ZnSO 4 electrolyte, the free water and coordinated water in Zn 2+ solvation sheath gradually interact with the antisolvent, which minimizes water activity and weakens Zn 2+ solvation. Concomitantly, dendrite-free Zn deposition occurs via change in the deposition orientation, as evidenced by in situ optical microscopy. Zn reversibility is significantly boosted in antisolvent electrolyte of 50% methanol by volume (Anti-M-50%) even under harsh environments of -20 °C and 60 °C. Additionally, the suppressed side reactions and dendrite-free Zn plating/stripping in Anti-M-50% electrolyte significantly enhance performance of Zn/polyaniline coin and pouch cells. We demonstrate this low-cost strategy can be readily generalized to other solvents, indicating its practical universality. Results will be of immediate interest and benefit to a range of researchers in electrochemistry and energy storage.
Keywords: Antisolvent
Zn ion battery
Zn2+ solvation
Description: First published: 13 January 2021
Rights: © 2021 Wiley‐VCH GmbH
DOI: 10.1002/anie.202016531
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Chemistry and Physics publications

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