title: Temperature-dependent electrochemical capacitive performance of the α-Fe2O3 hollow nanoshuttles as supercapacitor electrodes.
abstract: The design and optimization of supercapacitors electrodes nanostructures are critically important since the properties of supercapacitors can be dramatically enhanced by tunable ion transport channels. Herein, we demonstrate high-performance supercapacitor electrodes materials based on α-Fe2O3 by rationally designing the electrode microstructure. The large solid-liquid reaction interfaces induced by hollow nanoshuttle-like structures not only provide more active sites for faradic reactions but also facilitate the diffusion of the electrolyte into electrodes. These result in the optimized electrodes with high capacitance of 249 F g(-1) at a discharging current density of 0.5 A g(-1) as well as good cycle stability. In addition, the relationship between charge storage and the operating temperature has been researched. The specific capacitance has no significant change when the working temperature increased from 20 °C to 60 °C (e.g. 203 F g(-1) and 234 F g(-1) at 20 °C and 60 °C, respectively), manifesting the electrodes can work stably in a wide temperature range. These findings here elucidate the α-Fe2O3 hollow nanoshuttles can be applied as a promising supercapacitor electrode material for the efficient energy storage at various potential temperatures.
authors.affiliation: Key Lab for New Energy and Nanotechnology, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, People's Republic of China.
authors.forename: Xin
authors.initials: X
authors.lastname: Zheng
authors.affiliation: Key Lab for New Energy and Nanotechnology, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, People's Republic of China. Electronic address: xqyan@mater.ustb.edu.cn.
authors.forename: Xiaoqin
authors.initials: X
authors.lastname: Yan
authors.affiliation: Key Lab for New Energy and Nanotechnology, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, People's Republic of China.
authors.forename: Yihui
authors.initials: Y
authors.lastname: Sun
authors.affiliation: Key Lab for New Energy and Nanotechnology, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, People's Republic of China.
authors.forename: Yinsheng
authors.initials: Y
authors.lastname: Yu
authors.affiliation: Key Lab for New Energy and Nanotechnology, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, People's Republic of China.
authors.forename: Guangjie
authors.initials: G
authors.lastname: Zhang
authors.affiliation: Key Lab for New Energy and Nanotechnology, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, People's Republic of China.
authors.forename: Yanwei
authors.initials: Y
authors.lastname: Shen
authors.affiliation: Key Lab for New Energy and Nanotechnology, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, People's Republic of China.
authors.forename: Qijie
authors.initials: Q
authors.lastname: Liang
authors.affiliation: Key Lab for New Energy and Nanotechnology, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, People's Republic of China.
authors.forename: Qingliang
authors.initials: Q
authors.lastname: Liao
authors.affiliation: Key Lab for New Energy and Nanotechnology, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, People's Republic of China; State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, People's Republic of China. Electronic address: yuezhang@ustb.edu.cn.
authors.forename: Yue
authors.initials: Y
authors.lastname: Zhang
keywords: Energy storage; Fe(2)O(3) hollow nanoshuttles; Supercapacitor; Temperature effect