Zhu, S;
Dai, Y;
Li, J;
Ye, C;
Zhou, W;
Yu, R;
Liao, X;
... An, Q; + view all
(2022)
Cathodic Zn underpotential deposition: an evitable degradation mechanism in aqueous zinc-ion batteries.
Science Bulletin
, 67
(18)
pp. 1882-1889.
10.1016/j.scib.2022.08.023.
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Abstract
Aqueous zinc-ion batteries (AZIBs) are promising for large-scale energy storage, but their development is plagued by inadequate cycle life. Here, for the first time, we reveal an unusual phenomenon of cathodic underpotential deposition (UPD) of Zn, which is highly irreversible and considered the origin of the inferior cycling stability of AZIBs. Combining experimental and theoretical simulation approaches, we propose that the UPD process agrees with a two-dimensional nucleation and growth model, following a thermodynamically feasible mechanism. Furthermore, the universality of Zn UPD is identified in systems, including VO2//Zn, TiO2//Zn, and SnO2//Zn. In practice, we propose and successfully implement removing cathodic Zn UPD and substantially mitigate the degradation of the battery by controlling the end-of-discharge voltage. This work provides new insights into AZIBs degradation and brings the cathodic UPD behavior of rechargeable batteries into the limelight.
| Type: | Article |
|---|---|
| Title: | Cathodic Zn underpotential deposition: an evitable degradation mechanism in aqueous zinc-ion batteries |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.scib.2022.08.023 |
| Publisher version: | https://doi.org/10.1016/j.scib.2022.08.023 |
| 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: | Underpotential deposition, Zn metal deposition, Zinc-ion battery, Aqueous battery, Degradation mechanism |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10157431 |
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