Chen, Xue;
Li, Shijia;
Wang, Kai;
Zhao, Huiling;
He, Guanjie;
Bai, Ying;
(2024)
Halogenated solvation structure and preferred Zn (002) deposition via trace additive towards high reversibility for aqueous zinc-ion batteries.
Energy Storage Materials
, 73
, Article 103869. 10.1016/j.ensm.2024.103869.
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Abstract
Tremendous progress has been achieved in cathode materials for aqueous zinc-ion batteries (AZIBs), however their practical applications are hindered by the poor cycling stability of Zn anode. Herein, amphiphilic choline bromine (ChBr) is introduced as additive into highly-concentrated ZnSO4 aqueous electrolyte, which not only regulates the traditional Zn2+ solvation structure but also establishes an electrostatic shielding layer at electrolyte-anode interface. Compared to the pristine 3 M ZnSO4 electrolyte, ChBr-modified ZnSO4 electrolyte (ZSO-ChBr) is proven effective in promoting the reversibility of zinc plating/stripping and the preferred growth of Zn (002) plane, as well as suppressing the hydrogen evolution and side reactions on Zn anode surface. As a result, Zn||Zn symmetric cell in optimal ZSO-ChBr electrolyte could harvest a remarkable lifespan over 6000 h at 5 mA cm−2 and 1 mAh cm−2, besides a highly-reversible zinc plating/stripping process over 1500 cycles was achieved in Zn||Cu asymmetric cell. Moreover, the Zn||MnO2 full cell could exhibit an excellent rate capability and the cycling stability with a capacity retention of 80 % after 400 cycles. This work provides an integrated strategy of electrolyte engineering to elevate the desolvation kinetics of Zn2+ at anode-electrolyte interface and enhance the cycling stability of Zn anode, effectively improving the electrochemical performances of aqueous zinc-ion batteries (AZIBs) and promoting the development of various energy storage systems.
| Type: | Article |
|---|---|
| Title: | Halogenated solvation structure and preferred Zn (002) deposition via trace additive towards high reversibility for aqueous zinc-ion batteries |
| DOI: | 10.1016/j.ensm.2024.103869 |
| Publisher version: | https://doi.org/10.1016/j.ensm.2024.103869 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Rechargeable zinc battery; Anode-electrolyte interface; Multifunctional electrolyte additive; Solvation structure; Zinc deposition |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences 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/10200192 |
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