Hu, X;
Wu, R;
Naresh, N;
Fan, Y;
Wang, T;
Pinnock, I;
Ganose, AM;
... Deka Boruah, B; + view all
(2025)
Controlling Zn2+ hydration shell dynamics for long-life zinc anodes in zinc-ion energy storage.
Chemical Engineering Journal
, 526
, Article 171196. 10.1016/j.cej.2025.171196.
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Abstract
Zinc (Zn) anodes are highly suitable candidates for aqueous rechargeable zinc-ion energy storage, offering high capacity, excellent safety, affordability, and significant potential for energy storage in mini-grid and off-grid applications. However, Zn-based anodes face challenges related to poor long-term cycling performance due to uncontrolled dendrite formation, passivation, and the hydrogen evolution reaction (HER), which occurs due to the direct interaction of water molecules with the Zn anode surface. In this study, we explore strategies for reconstructing Zn anodes by utilising 2D V₂O₅ to regulate hydrated Zn2+ ions and minimise the direct interaction of water molecules with Zn anodes, thereby suppressing side reactions. The V₂O₅-coated Zn (V₂O₅/Zn) anodes exhibit an extended lifespan compared to bare Zn, as well as significant dendrite-free behaviour. Theoretical simulations reveal that Zn2+ ion transport occurs through the interlayer spacing of V₂O₅ via the desolvation of hydrated Zn2+ ions. Furthermore, full-cell aqueous Zn-ion batteries (ZIBs) incorporating V₂O₅/Zn//polyaniline (PANI) configurations exhibit improved rate capability, higher capacity, and extended cycle life compared to Zn//PANI batteries. Similarly, V₂O₅/Zn anodes demonstrate enhanced long-term cycling stability and improved capacity in Zn-ion capacitors (ZICs) when paired with activated carbon cathodes, outperforming devices using pristine Zn anodes.
| Type: | Article |
|---|---|
| Title: | Controlling Zn2+ hydration shell dynamics for long-life zinc anodes in zinc-ion energy storage |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.cej.2025.171196 |
| Publisher version: | https://doi.org/10.1016/j.cej.2025.171196 |
| Language: | English |
| Additional information: | Copyright © 2025 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
| Keywords: | Artificial layer; Desolvation; Zn anodes; Dendrite suppression; Zn-ion batteries and capacitors |
| 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 > MAPS Faculty Office UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office > Institute for Materials Discovery |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10219318 |
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