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Author Xiao, Anguo ♦ Zhou, Shibiao ♦ Zuo, Chenggang ♦ Zhuan, Yongbing ♦ Ding, Xiang
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ CAPACITANCE ♦ CAPACITIVE ENERGY STORAGE EQUIPMENT ♦ CAPACITORS ♦ CATHODES ♦ ELECTROCHEMISTRY ♦ ELECTRON TRANSFER ♦ HYDROTHERMAL SYNTHESIS ♦ IONS ♦ MANGANESE OXIDES ♦ NANOTUBES ♦ OXIDATION ♦ POROUS MATERIALS ♦ THIN FILMS ♦ ZINC OXIDES
Abstract Graphical abstract: Self-supported porous MnO{sub 2}/C nanotube arrays are prepared by combined hydrothermal plus carbonization methods and demonstrated with high capacitance and good cycling life as cathode of supercapacitors. - Highlights: • MnO{sub 2}/C nanotube arrays are synthesized by a hydrothermal method. • MnO{sub 2}/C nanotube arrays show good high-rate performance. • MnO{sub 2}/C nanotube arrays show an excellent cycling performance. - Abstract: Controllable synthesis of high-capacity cathode is the research hotspot in the field of supercapacitors. In this work, with the help of sacrificial ZnO template, MnO{sub 2}/C nanotube arrays are formed by hydrothermal synthesis plus glucose carbonization. MnO{sub 2}/C composite nanotubes of 120–130 nm are formed and grow vertically to the substrate forming the final nanotube arrays. Fast ion/electron transfer is realized in this unique porous nanotube architecture. As cathode of supercapacitors, the MnO{sub 2}/C nanotube arrays exhibit high specific capacitance (790 F g{sup −1} at 5 A g{sup −1}), excellent rate performance (570 F g{sup −1} at 30 A g{sup −1}) and long-term cycling stability (90.7% capacitance retention after 20,000 cycles). The proposed electrode construction strategy is favorable for fabrication of other capacitive cathodes for energy storage.
ISSN 00255408
Educational Use Research
Learning Resource Type Article
Publisher Date 2017-12-15
Publisher Place United States
Journal Materials Research Bulletin
Volume Number 96


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