Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 7, Issue 16, Pages 14031-+Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.9b02549
Keywords
Cold spray technique; Supercapacitor; Zn2SnO4; CNT; Nanocomposite
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Funding
- Technology Development Program to Solve Climate Changes of the National Research Foundation (NRF) - Ministry of Science, ICT AMP
- Future Planning [NRF-2016M1A2A2936760, NRF-2017R1A2B4005639, NRF-2013R1A5A1073861]
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In this study, we demonstrate rapid and facile supersonic cold spray deposition of Zn2SnO4/SnO2/CNT nano-composite supercapacitor electrodes with promising combinations of power and energy density. Cyclic voltammetry confirmed the capacitive behavior of the optimized electrode, with specific capacitance reaching 260 F.g(-1) at a current density of 10 A.g(-1). We attribute this high performance to the optimal combination of CNT (carbon nanotube; double-layer capacitance) and Zn2SnO4/SnO2 (pseudocapacitance) properties. The mesoporous and accessible surface of the CNT significantly contributed to the excellent retention (approximately 93%) of the specific capacitance after 15000 galvanostatic charge/discharge cycles. In addition, the supercapacitor exhibited a remarkable energy density, electrochemical properties, and mechanical stability. The materials and approach presented here can enable
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