Johnson, ID;
Nolis, G;
Yin, L;
Yoo, HD;
Parajuli, P;
Mukherjee, A;
Andrews, JL;
... Darr, JA; + view all
(2020)
Enhanced charge storage of nanometric ζ-V₂O₅ in Mg electrolytes.
Nanoscale
, 12
(43)
pp. 22150-22160.
10.1039/d0nr05060a.
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Abstract
V2O5 is of interest as a Mg intercalation electrode material for Mg batteries, both in its thermodynamically stable layered polymorph (α-V2O5) and in its metastable tunnel structure (ζ-V2O5). However, such oxide cathodes typically display poor Mg insertion/removal kinetics, with large voltage hysteresis. Herein, we report the synthesis and evaluation of nanosized (ca. 100 nm) ζ-V2O5 in Mg-ion cells, which displays significantly enhanced electrochemical kinetics compared to microsized ζ-V2O5. This effect results in a significant boost in stable discharge capacity (130 mA h g−1) compared to bulk ζ-V2O5 (70 mA h g−1), with reduced voltage hysteresis (1.0 V compared to 1.4 V). This study reveals significant advancements in the use of ζ-V2O5 for Mg-based energy storage and yields a better understanding of the kinetic limiting factors for reversible magnesiation reactions into such phases.
| Type: | Article |
|---|---|
| Title: | Enhanced charge storage of nanometric ζ-V₂O₅ in Mg electrolytes |
| Location: | England |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1039/d0nr05060a |
| Publisher version: | https://doi.org/10.1039/d0nr05060a |
| Language: | English |
| Additional information: | This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence (http://creativecommons.org/licenses/by-nc/3.0/). |
| 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/10114708 |
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