期刊
FRONTIERS IN CHEMISTRY
卷 8, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fchem.2020.00043
关键词
high power density; hierarchical porous carbon; supercapacitors; biomass carbon
资金
- National Key Research and Development Program of China [2018YFC1901605]
- National Postdoctoral Program for Innovative Talents [BX201600192]
- Hunan Provincial Science and Technology Plan [2017TP1001]
- Innovation Mover Program of Central South University [GCX20190893Y]
Tuning hierarchical pore structure of carbon materials is an effective way to achieve high energy density under high power density of carbon-based supercapacitors. However, at present, most of methods for regulating pores of carbon materials are too complicated to be achieved. In this work, a durian shell derived porous carbon (DSPC) with abundant porous is prepared through chemical activation as a defect strategy. Hierarchical porous structure can largely enhance the transfer rate of electron/ion. Furthermore, DSPC with multiple porous structure exhibits excellent properties when utilized as electrode materials for electric double layer capacitors (EDLCs), delivering a specific capacitance of 321 F g(-1) at 0.5 A g(-1) in aqueous electrolyte. Remarkably, a high energy density of 27.7 Wh kg(-1) is obtained at 675 W kg(-1) in an organic two-electrode device. And large capacity can be remained even at high charge/discharge rate. Significantly, hierarchical porous structure allows efficient ion diffusion and charge transfer, resulting in a prominent cycling stability. This work is looking forward to providing a promising strategy to prepare hierarchical porous carbon-based materials for supercapacitors with ultrafast electron/ion transport.
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