期刊
SCIENTIFIC REPORTS
卷 4, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/srep06349
关键词
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资金
- National Natural Science Foundation of China [21376208, U1162124]
- Zhejiang Provincial Natural Science Foundation for Distinguished Young Scholars of China [LR13B030001]
- Specialized Research Fund for the Doctoral Program of Higher Education [J20130060]
- Fundamental Research Funds for the Central Universities
- Program for Zhejiang Leading Team of ST Innovation
- Partner Group Program of the Zhejiang University
- Max-Planck Society
Fabrication of hierarchically porous carbon materials (HPCs) with high surface area and pore volume has always been pursued. However, the currently effective template methods and acid/base activation strategies suffer from the drawbacks of either high costs or tedious steps. Herein, HPCs with 3D macro-mesopores and short-range meso-micropores were fabricated via an easy and sustainable two-step method from biomass. Macro-mesopores were constructed by slightly accumulation/aggregation of carbon spheres ranging from 60 nm to 80 nm, providing efficient mass diffusion pathways. Short-range mesopores and micropores with high electrolyte accessibility were developed in these spheres by air activation. The obtained HPCs showed surface area values up to 1306 m(2)/g and high mesopore volume proportion (63.9%). They demonstrated excellent capacitance and low equivalent series resistance (ESR) as supercapacitor electrode materials, suggesting the efficient diffusion and adsorption of electrolyte ions in the designed hierarchically porous structure.
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