Nitrogen-doped hierarchical porous carbon from polyaniline/silica self-aggregates for supercapacitor |
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Authors: | Peipei Li Dazhi Zhang Yunhui Xu Caihua Ni Gang Shi Xinxin Sang |
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Affiliation: | 1.Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China;2.Xuzhou College of Industrial Technology, Xuzhou 221140, China |
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Abstract: | In this paper, nitrogen-doped hierarchical porous carbon (N-HPC) was prepared from polyaniline (PANI)/silica self-aggregates. H-bonding between N\\H groups in aniline/PANI and\\OH groups in nano silica template led to a self-assembly type, which enabled the formation of uniform N-HPC nanoparticles. Silica self-aggregates provided macroporous channels resulted in a decreased diffusion distance. After removing the hard template, the N-HPC had a high surface area (899 m2·g-1). Owing to two co-existed synergetic energy-storage mechanisms and the hierarchical porous structure, the obtained N-HPC exhibited a high specific capacitance of 218.75 F·g-1 at 0.5 A·g-1, compared with the nonporous nitrogen-doped carbon (N-C) derived from pure PANI. Moreover, the N-HPC electrode demonstrated excellent cycle life, retaining 99% of its initial specific capacitance after 1000 cycles. |
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Keywords: | Nitrogen-doped Hierarchical porous carbon Hard template Silica self-aggregates |
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