Hydrangea-like multi-scale carbon hollow submicron spheres with hierarchical pores for high performance supercapacitor electrodes
Data(s) |
10/09/2015
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Resumo |
Uniform hydrangea-like multi-scale carbon hollow submicron spheres (HCSSg) are fabricated by a simple hydrothermal method using glucose as carbon source and fibrous silicon dioxides spheres as shape guide. Structure characterization suggests that petal-like partially graphitized carbon nanosheets with the thickness of about 10 nm arranged in three dimensions (3D) to form the hydrangea-like hollow spheres (size ranging from 250 to 500 nm) with mesoporous channels, which can be conducive to be a high specific surface area (934 m2 g-1) and bulk density (0.87 cm g-3), hierarchical pores structure with good conductivity. As a result, the HCSSg has been demonstrated to be a supercapacitor electrode material with high gravimetric (386 F g-1 at 0.2 A g-1) and outstanding volumetric (335 F cm-3) capacitance, good rate capability and cycling stability with 94% capacitance retention after 5000 cycles in aqueous electrolytes, thus suggesting its application potential. |
Identificador | |
Idioma(s) |
eng |
Publicador |
Pergamon Press |
Relação |
http://dro.deakin.edu.au/eserv/DU:30078956/chen-hydrangealike-2015.pdf http://www.dx.doi.org/10.1016/j.electacta.2015.07.032 |
Direitos |
2015, Elsevier |
Palavras-Chave | #hydrangea-like #carbon hollow submicron spheres #mesoporous channels #supercapacitor #gravimetric and volumetric capacitance |
Tipo |
Journal Article |