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The practical application of Zn-ion batteries (ZIBs) faces several challenges, particularly regarding poor reversibility and the reactivity of water in the electrolytes across a wide temperature range. Herein, this study presents the design of a ternary electrolyte with significant intermolecular interactions based on tetrahydrofurfuryl alcohol (THFA), H2O, and Zn(OTf)2 to address these challenges from −40 to 60 °C. The ether alcohol compound THFA effectively mitigates the side reactions about water, by disrupting and suppressing the reactivity of the dominant water-based clusters. Through experimental and theoretical investigations, the structural and mechanistic insights of ternary solvation clusters are uncovered. The hydrogen-bond-induced interactions of THFA facilitate the participation of OTf− in solvation clusters and bidentate chelation coordination with Zn2+ ensures the formation of lean-water solvation clusters. Furthermore, the interfacial electrochemistry on the Zn surface is also regulated to exhibit a preferential layer-by-layer (0 0 2) oriented deposition with a stable solid electrolyte interface (SEI). As a result, The Zn||VO2 battery using ternary electrolyte maintains a capacity of 237.5 mAh g−1 with an 86.71% retention after 500 cycles at 60 °C and 3 A g−1, while it exhibits stable cycle even at −40 °C over 200 cycles with almost no capacity decrease. © 2023 Wiley-VCH GmbH.
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Advanced Functional Materials
ISSN: 1616-301X
Year: 2024
Issue: 4
Volume: 34
1 8 . 5 0 0
JCR@2023
CAS Journal Grade:1
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ESI Highly Cited Papers on the List: 0 Unfold All
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30 Days PV: 1
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