Dai, Yuhang;
Lu, Ruihu;
Zhang, Chengyi;
Li, Jiantao;
Yuan, Yifei;
Mao, Yu;
Ye, Chumei;
... Mai, Liqiang; + view all
(2024)
Zn2+-mediated catalysis for fast-charging aqueous Zn-ion batteries.
Nature Catalysis
, 7
(7)
pp. 776-784.
10.1038/s41929-024-01169-6.
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Abstract
Rechargeable aqueous zinc-ion batteries (AZIBs), renowned for their safety, high energy density and rapid charging, are prime choices for grid-scale energy storage. Historically, ion-shuttling models centring on ion-migration behaviour have dominated explanations for charge/discharge processes in aqueous batteries, like classical ion insertion/extraction and pseudocapacitance mechanisms. However, these models struggle to account for the exceptional performance of AZIBs compared to other aqueous metal-ion batteries. Here we present a catalysis model elucidating the Zn2+ anomaly in aqueous batteries, explaining it through the concept of adsorption in catalysis. Such behaviour can serve the charge/discharge role, predominantly dictated by solvated metal cations and cathode materials. First-principles calculations suggest optimal adsorption/desorption behaviour (water dissociation process) with the Zn2+–vanadium nitride (VN) combination. Experimentally, AZIBs implementing VN cathodes demonstrate fast-charging kinetics, showing a capacity of 577.1 mAh g−1 at a current density of 300,000 mA g−1. The grasp of catalysis steps within AZIBs can drive solutions beyond state-of-the-art fast-charging batteries.
| Type: | Article |
|---|---|
| Title: | Zn2+-mediated catalysis for fast-charging aqueous Zn-ion batteries |
| DOI: | 10.1038/s41929-024-01169-6 |
| Publisher version: | http://dx.doi.org/10.1038/s41929-024-01169-6 |
| 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. |
| 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 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.ucl.ac.uk/id/eprint/10196116 |
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