Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6609378 | Electrochimica Acta | 2016 | 6 Pages |
Abstract
The nanoscale microporous carbide-derived carbon (nano-CDC) is synthesized by chlorination of silicon carbide nano-powder with a particle diameter around 60Â nm and further pore-tuned by KOH activation with different KOH/nano-CDC ratios. Based on the higher specific surface area (SSA), a hierarchical micro- and meso-pore structure (especially for the greatly produced mesopores), and the shorter inherent ion transport distance within porous nano-carbons, the KOH-activated nano-CDC exhibits superior supercapacitive performances. Its specific capacitance is up to 141Â FÂ gâ1, 156% increase compared with that of pristine nano-CDC (54Â FÂ gâ1). Most interestingly, the cyclic voltammogram curve of the activated nano-CDC can keep a rectangular-like shape even at a scan rate of 5000Â mVÂ sâ1, exhibiting significantly better power performance. This work confirms that constructing favorable pore structure in nanometer-sized porous carbons is an effective strategy for fabricating high-power supercapacitors.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Pengtao Yan, Jiang Xu, Chao Wu, Yu Gu, Xuesha Zhang, Ruijun Zhang, Yibo Song,