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论文类型： 期刊论文

发表时间： 2017-07-01

发表刊物： APPLIED SURFACE SCIENCE

收录刊物： SCIE、EI、Scopus

卷号： 409

页面范围： 261-269

ISSN号： 0169-4332

关键字： Porous carbon film; Double-layer supercapacitor; Microwave plasma; Chemical vapor deposition; Supercapacitive energy storage

摘要： Highly porous carbon film (PCF) coated on nickel foam was prepared successfully by microwave plasma assisted chemical vapor deposition (MPCVD) with C2H2 as carbon source and Ar as discharge gas. The PCF is uniform and dense with 3D-crosslinked nanoscale network structure possessing high degree of graphitization. When used as the electrode material in an electrochemical supercapacitor, the PCF samples verify their advantageous electrical conductivity, ion contact and electrochemical stability. The test results show that the sample prepared under 1000W microwave power has good electrochemical performance. It displays the specific capacitance of 62.75 Fig at the current density of 2.0 A/g and retains 95% of its capacitance after 10,000 cycles at the current density of 2.0 A/g. Besides, its near-rectangular shape of the cyclic voltammograms (CV) curves exhibits typical character of an electric double-layer capacitor, which owns an enhanced ionic diffusion that can fit the requirements for energy storage applications. (C) 2017 Elsevier B.V. All rights reserved.