Bauer, D;
Ashton, TE;
Brett, DJL;
Shearing, PR;
Matsumi, N;
Darr, JA;
(2019)
Mixed molybdenum and vanadium oxide nanoparticles with excellent high-power performance as Li-ion battery negative electrodes.
Electrochimica Acta
, 322
, Article 134695. 10.1016/j.electacta.2019.134695.
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Abstract
Several nano-sized mixed molybdenum/vanadium oxide monoclinic solid solutions were synthesised using a continuous hydrothermal flow process and studied with a wide range of physical characterization techniques including X-ray photoelectron spectroscopy, X-ray diffraction, transmission electron microscopy and X-ray absorption spectroscopy. The nanomaterials were tested as anodes for Li-ion batteries in the potential range 0.05–3.00 V vs. Li/Li+. Samples with nominal formulas of Mo0.5V0.5O2 and Mo0.33V0.67O2 showed excellent performance, especially at high current rates, due to their highly pseudocapacitive charge storage mechanism. At a specific current of 10 A g−1, Mo0.5V0.5O2 and Mo0.33V0.67O2 showed specific capacities of ca. 200 and 170 mAh g−1, respectively. Mo0.5V0.5O2 also showed good cyclability, with a specific capacity of 480 mAh g−1 after 150 cycles at a specific current of 0.5 A g−1. For cyclic voltammetries conducted at high scan rates, pseudocapacitive charge storage contributed more than 90% to the total charge storage for both samples. The scalability of the synthesis technique and excellent electrochemical performance at high power, make these materials promising as negative electrode active materials for Li-ion batteries.
| Type: | Article |
|---|---|
| Title: | Mixed molybdenum and vanadium oxide nanoparticles with excellent high-power performance as Li-ion battery negative electrodes |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.electacta.2019.134695 |
| Publisher version: | https://doi.org/10.1016/j.electacta.2019.134695 |
| Language: | English |
| Additional information: | Copyright © 2019 Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
| Keywords: | Continuous hydrothermal flow synthesis, Molybdenum-vanadium oxide, Nanoparticles, Solid solution, Li-ion battery |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS 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 > 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/10081033 |
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