Jiang, Z;
Du, Z;
Luo, K;
Zhang, Y;
Yang, H;
Zhang, W;
Chen, R;
... He, G; + view all
(2025)
Amorphous anion skeletons induce rapid and cation-selective ion flux towards stable aqueous zinc–iodine batteries.
Energy & Environmental Science
10.1039/d5ee02454d.
(In press).
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Abstract
The aqueous zinc–iodine battery is considered a promising technology for large-scale energy storage due to its high safety, large energy density, and easy accessibility. However, its development suffers from two challenges: parasitic side reactions on Zn anodes and polyiodide shuttling effects. To overcome them, we designed an artificial protective layer on the Zn anode based on amorphous zeolite-like Na2Zn2(TeO3)3, whose crystalline counterpart possesses periodic ion channels and an anion skeleton. It not only preserves the original coordination environments and pore structures of the Na2Zn2(TeO3)3 crystal, but also exhibits broadened ion channels and shortened ion diffusion pathways. Combined with the superior structural stability of the amorphous Na2Zn2(TeO3)3, the Zn anode can cycle stably for 2790 h at 1 mA cm−2 with a low overpotential. Meanwhile, the Zn2(TeO3)32− anion skeleton can also repel I−-species and SO42− anions from the anode surface, thus enabling outstanding Zn plating/stripping reversibility and excellent cycling ability of the full cells coupled with different cathodes. Significantly, the capacity retention of the high mass loading zinc–iodine pouch cell was 92.7% after 600 cycles. This work provides a novel strategy to achieve high-performance zinc–iodine batteries, which has great promise for practical applications.
| Type: | Article |
|---|---|
| Title: | Amorphous anion skeletons induce rapid and cation-selective ion flux towards stable aqueous zinc–iodine batteries |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1039/d5ee02454d |
| Publisher version: | https://doi.org/10.1039/d5ee02454d |
| Language: | English |
| Additional information: | This article is licensed under a Creative Commons Attribution 3.0 Unported Licence, https://creativecommons.org/licenses/by/3.0/. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given. |
| 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.ucl.ac.uk/id/eprint/10210704 |
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