Chen, Ruwei;
Zhang, Chengyi;
Li, Jianwei;
Du, Zijuan;
Guo, Fei;
Zhang, Wei;
Dai, Yuhang;
... He, Guanjie; + view all
(2023)
A hydrated deep eutectic electrolyte with finely-tuned solvation chemistry for high-performance zinc-ion batteries.
Energy & Environmental Science
10.1039/d3ee00462g.
(In press).
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Abstract
Despite their cost-effectiveness and intrinsic safety, aqueous zinc-ion batteries have faced challenges with poor reversibility originating from various active water-induced side reactions. After systematically scrutinizing the effects of water on the evolution of solvation structures, electrolyte properties, and electrochemical performances through experimental and theoretical approaches, a hydrated deep eutectic electrolyte with a water-deficient solvation structure ([Zn(H2O)2(eg)2(otf)2]) and reduced free water content in the bulk solution is proposed in this work. This electrolyte can dramatically suppress water-induced side reactions and provide high Zn2+ mass transfer kinetics, resulting in highly reversible Zn anodes (∼99.6% Coulombic efficiency over 1000 cycles and stable cycling over 4500 h) and high capacity Zn//NVO full cells (436 mA h g−1). This work will aid the understanding of electrolyte solvation structure–electrolyte property–electrochemical performance relationships of aqueous electrolytes in aqueous zinc-ion batteries.
| Type: | Article |
|---|---|
| Title: | A hydrated deep eutectic electrolyte with finely-tuned solvation chemistry for high-performance zinc-ion batteries |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1039/d3ee00462g |
| Publisher version: | https://doi.org/10.1039/d3ee00462g |
| Language: | English |
| Additional information: | This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. |
| Keywords: | Science & Technology, Physical Sciences, Technology, Life Sciences & Biomedicine, Chemistry, Multidisciplinary, Energy & Fuels, Engineering, Chemical, Environmental Sciences, Chemistry, Engineering, Environmental Sciences & Ecology, WATER |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10170177 |
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