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Hydrangea-like multi-scale carbon hollow submicron spheres with hierarchical pores for high performance supercapacitor electrodes.
- Source :
-
Electrochimica Acta . Sep2015, Vol. 176, p207-214. 8p. - Publication Year :
- 2015
-
Abstract
- 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 m 2 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. [ABSTRACT FROM AUTHOR]
- Subjects :
- *HYDRANGEAS
*MULTISCALE modeling
*SUPERCAPACITORS
*ELECTRODES
*IONIC conductivity
Subjects
Details
- Language :
- English
- ISSN :
- 00134686
- Volume :
- 176
- Database :
- Academic Search Index
- Journal :
- Electrochimica Acta
- Publication Type :
- Academic Journal
- Accession number :
- 109279458
- Full Text :
- https://doi.org/10.1016/j.electacta.2015.07.032