CUED Publications database

Self-standing electrodes with core-shell structures for high-performance supercapacitors

He, G and Ling, M and Han, X and Abou El Amaiem, DI and Shao, Y and Li, Y and Li, W and Ji, S and Li, B and Lu, Y and Zou, R and Ryan Wang, F and Brett, DJL and Xiao Guo, Z and Blackman, C and Parkin, IP (2017) Self-standing electrodes with core-shell structures for high-performance supercapacitors. Energy Storage Materials, 9. pp. 119-125.

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Fabrication of supercapacitor devices with the carbon cloth supported W N@carbon ultrathin layer core-shell structures (W 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 at 5 mV s 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 N over WO 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. 2 2 2 3-x -2 -1

Item Type: Article
Divisions: Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 03 Aug 2017 02:37
Last Modified: 10 Apr 2021 00:43
DOI: 10.1016/j.ensm.2017.07.005