Dual carbon source method to fabricate hierarchical porous carbon with three-dimensional interconnected network structure toward advanced energy storage device |
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Affiliation: | 1. School of Chemistry and Environmental Engineering, Hubei Key Laboratory of Novel Reactor and Green Chemistry Technology, Wuhan Institute of Technology, Wuhan 430205, PR China;2. School of Materials and Mechanical Engineering, Key Laboratory of Processing and Quality Evaluation Technology of Green Plastics of China National Light Industry Council, Beijing Technology and Business University, Beijing 100048, PR China |
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Abstract: | Selective fabrication of carbon materials with developed specific surface area and hierarchical porous structure is essential for high-performance carbon-based supercapacitors. Direct carbonization of organic acid salts represents a strategy that can produce porous carbon with high specific surface area, but it is still hindered by low carbon yield, impeding its large-scale application. Herein, a biomass-derived hierarchical porous carbon with large specific surface area is prepared via a facile one-pot calcination method. The optimal SCPC-4 sample presents three-dimensional interconnected network structure and plentiful heteroatom content. Hence, it delivers a large specific capacitance of 321 F g?1 at a current density of 1 A g?1, and negligible capacitance loss after 10,000 cycles at 10 A g?1. In addition, the assembled SCPC-4 based symmetric supercapacitor exhibits an energy density of 21.2 Wh kg?1 at a power density of 900 W kg?1. This cost-effective binary biomass carbon source route provides a great possibility for the mass production of high-yield porous carbon materials. |
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Keywords: | Potassium citrate Biomass Porous carbon Electrochemistry Supercapacitor |
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