He, G;
Ling, M;
Han, X;
Abou El Amaiem, DI;
Shao, Y;
Li, Y;
Li, W;
... Parkin, IP; + view all
(2017)
Self-standing electrodes with core-shell structures for high-performance supercapacitors.
Energy Storage Materials
, 9
pp. 119-125.
10.1016/j.ensm.2017.07.005.
Preview |
Text
Blackman_1-s2.0-S2405829717302428-main.pdf - Published Version Download (1MB) | Preview |
Abstract
Fabrication of supercapacitor devices with the carbon cloth supported W 2 N@carbon ultrathin layer core-shell structures (W 2 N@C CS/carbon cloth) were realized by aerosol-assisted chemical vapour deposition (AACVD) followed by an ammonia annealing process. The representative electrodes delivered excellent areal specific capacitance of 693.0 mF cm -2 at 5 mV s -1 in a three electrode testing system, good rate capability of ~ 78% retention when the scan rate increased 10 times and superior cycling stability with ~ 91% capacitance retention after 20,000 cycles. The self-standing electrodes were manufactured for flexible asymmetric supercapacitors and assembled into coin cells with ionic electrolyte for high working voltage applications. The primary origins for the outperformance of W 2 N over WO 3-x in acid aqueous electrolytes are uncovered by electrochemical analysis, simulation work and in-situ transmission electron microscope (TEM). This discovery paved the way of exploring and designing advanced metal nitride electrode materials for supercapacitors.
| Type: | Article |
|---|---|
| Title: | Self-standing electrodes with core-shell structures for high-performance supercapacitors |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.ensm.2017.07.005 |
| Publisher version: | http://doi.org/10.1016/j.ensm.2017.07.005 |
| Language: | English |
| Additional information: | © 2017 The Authors. Published by Elsevier B.V. This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Tungsten nitride; Supercapacitor; Aerosol-assisted chemical vapour deposition; Density Functional Theory; In-situ transmission electron microscope |
| 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/1567519 |
Archive Staff Only
 |
View Item |
