Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China.
Herbert Gleiter Institute of Nanoscience, Nanjing University of Science and Technology, Nanjing 210094, PR China.
J Colloid Interface Sci. 2018 Feb 15;512:713-721. doi: 10.1016/j.jcis.2017.10.093. Epub 2017 Oct 28.
In this work, we have fabricated a kind of N-doped hierarchal carbon fiber web by electrospinning hollow mesoporous carbon spheres (HMCSs) into fibrous structure. The as-synthesized carbon fiber web with novel mulberry-like morphology, thus denoted as MC-FW, possesses micro/meso/macroporous porosity, large surface area, high conductivity and multi-level structure, which are highly desired for supercapacitor electrode materials. The electrochemical measurements demonstrate that the designed MC-FW shows high capacitance (298.6 F g), favorable capacitance retention (71.0%) and long cycle life (97.3% capacitance retention after 5000 cycles). Notably, the capacitance of 298.6 F g for MC-FW is higher than the capacitance reported so far for many hollow carbon spheres and carbon fibers, which may contribute to the synergistic effect between the merits of HMCSs (e.g. micro/meso/macroporous hierarchal structure, large surface area, high pore volume) and advantages of 1D carbon fiber (e.g. large aspect ratio and high conductivity). It is believed that this distinctive carbon fiber web may show promising prospects as advanced energy storage materials and catalyst.
在这项工作中，我们通过静电纺丝将中空介孔碳球（HMCS）纺成纤维状结构，制备了一种 N 掺杂的分层碳纤维网。所合成的碳纤维网具有新颖的桑椹状形态，因此被命名为 MC-FW，具有微/介/大孔孔隙率、大比表面积、高导电性和多层次结构，这些都是超级电容器电极材料所需要的。电化学测量表明，所设计的 MC-FW 具有高电容（298.6 F g）、良好的电容保持率（71.0%）和长循环寿命（5000 次循环后电容保持率为 97.3%）。值得注意的是，MC-FW 的 298.6 F g 的电容高于迄今为止许多空心碳球和碳纤维的报道电容，这可能归因于 HMCSs（例如微/介/大孔分层结构、大比表面积、高孔体积）的优点和 1D 碳纤维（例如大纵横比和高导电性）的优点之间的协同效应。相信这种独特的碳纤维网作为先进的储能材料和催化剂可能具有广阔的前景。
