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Chemical Engineering Journal
Article . 2023 . Peer-reviewed
License: Elsevier TDM
Data sources: Crossref
https://doi.org/10.2139/ssrn.4...
Article . 2023 . Peer-reviewed
Data sources: Crossref
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Hydrated Solvation Suppression of Zinc Ions for Highly Reversible Zinc Anodes

Authors: Qinping Jian; Tianshuai Wang; Jing Sun; Bin Liu; Tianshou Zhao;

Hydrated Solvation Suppression of Zinc Ions for Highly Reversible Zinc Anodes

Abstract

Low-cost and high-safety aqueous zinc batteries are promising for large-scale energy storage applications. However, the actual performance of aqueous zinc batteries is hampered by the irreversibility of the zinc metal anode originating from the dendrite growth and side reactions, which are associated closely with the hydrated solvation sheath of Zn2+ ions in aqueous electrolytes. Here, dimethylacetamide is employed as a water dragger agent in low-concentration ZnSO4 electrolytes to reshape the solvation structure of Zn2+ ions. Theoretical calculations and experimental investigations reveal that a low fractional addition of dimethylacetamide in aqueous ZnSO4 electrolytes performs strong interactions with water molecules and Zn2+ ions, which inhibits hydrated Zn2+–H2O solvation, facilitates Zn2+-SO42- association and captures free water molecules via H-bonds formation. The coulombic efficiency of Zn plating/stripping is improved from 94.3% to 98.1% and can be stabilized at 99.5% over 200 cycles with the hybrid electrolyte. The cycle lifespan of the Zn symmetric cell is prolonged over 1000 h at 1 mA cm−2 and over 450 h at 5 mA cm−2 with the dimethylacetamide -hybrid electrolyte, which are over fourfold higher than that of the pristine ZnSO4 electrolyte. Moreover, when the designed electrolyte is incorporated in full cells, the Zn-MnO2 cell exhibits an improved rate performance and an excellent long-term cyclability with a capacity-retention rate of 81% over 2,000 cycles at 1 A g−1. This work provides a feasible strategy for the development of highly stable aqueous zinc batteries. © 2023 Elsevier B.V.

Country
China (People's Republic of)
Related Organizations
Keywords

Energy storage, Electrolyte modulation, Solvation regulation, Zinc anode

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
30
Top 10%
Top 10%
Top 10%
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