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Carbon Thin Film Wrapped around a Three‐Dimensional Nitrogen‐Doped Carbon Scaffold for Superior‐Performance Supercapacitors
Author(s) -
Xu Lingling,
Yin Dandan,
Zhao Hongyang,
Li Na,
Chen Suhua,
Xia Jiale,
Lu Bingan,
Du Yaping
Publication year - 2017
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201701418
Subject(s) - supercapacitor , materials science , cyclic voltammetry , carbon fibers , melamine , capacitance , chemical engineering , thin film , electrolyte , electrochemistry , chemical vapor deposition , carbonization , carbon film , electrode , nanotechnology , inorganic chemistry , composite material , chemistry , scanning electron microscope , composite number , engineering
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.