期刊
FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
卷 25, 期 6, 页码 391-396出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/1536383X.2017.1324850
关键词
Graphene; carbon nanotube; heterostructured MnO2; supercapacitor
类别
资金
- National Natural Science Foundation of China [51672221]
- China Aeronautical Science Fund [2014ZF53074]
- Key Science and Technology Program of Shaanxi Province, China [2013K09-03]
In this article, three-dimensional (3D) heterostructured of MnO2/graphene/carbon nanotube (CNT) composites were synthesized by electrochemical deposition (ELD)-electrophoretic deposition (EPD) and subsequently chemical vapour deposition (CVD) methods. MnO2/graphene/CNT composites were directly used as binder-free electrodes to investigate the electrochemical performance. To design a novel electrode material with high specific area and excellent electrochemical property, the Ni foam was chosen as the substrate, which could provide a 3D skeleton extremely enhancing the specific surface area and limiting the huge volume change of the active materials. The experimental results indicated that the specific capacitance of MnO2/graphene/CNT composite was up to 377.1 F g(-1) at the scan speed of 200 mV s(-1) with a measured energy density of 75.4 Wh kg(-1). The 3D hybrid structures also exhibited superior long cycling life with close to 90% specific capacitance retained after 500 cycles.
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