Chemistry - A European Journal
Chemistry - A European Journal
5 years ago

Carbon Thin Film Wrapped around a Three-Dimensional Nitrogen-Doped Carbon Scaffold for Superior-Performance Supercapacitors

Carbon Thin Film Wrapped around a Three-Dimensional Nitrogen-Doped Carbon Scaffold for Superior-Performance Supercapacitors
Bingan Lu, Na Li, Jiale Xia, Dandan Yin, Suhua Chen, Yaping Du, Hongyang Zhao, Lingling Xu
A carbon thin film/carbon foam core/sheath structure was synthesized by chemical vapor deposition (CVD) on carbonized melamine foam. It has a specific capacitance of 310 F g−1 at a current density of 1 A g−1 and shows outstanding electrochemical performance in both aqueous and water-in-salt electrolytes. Electrochemical analysis by cyclic voltammetry and galvanostatic charge/discharge testing revealed a large capacitive contribution up to more than 90 % of its total capacitance. The core/sheath structure has advantages in ion transport and a high degree of utilization of the electrode surface, and the synthetic process provides a way to coat carbon thin film on any substrate by nickel-catalyzed CVD. It's a wrap: A supercapacitor electrode with a core/sheath structure in which a thin carbon film is wrapped around a 3D carbonized melamine foam (CMF) scaffold was fabricated (see figure). The unique 3D structure allows utilization of both sides of the carbon thin film and the CMF surface, and the hollow space between carbon thin film and CMF scaffold can facilitate electrolyte ion transport.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/chem.201701418

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