聚丙烯腈
碳化
超级电容器
材料科学
碳纳米管
化学工程
碳纤维
电化学
复合材料
纳米技术
电极
聚合物
复合数
化学
扫描电子显微镜
物理化学
工程类
作者
Yanqing Wang,Jinying Wang,Shingo Morimoto,Gan Jet Hong Melvin,Ruiqi Zhao,Yoshio Hashimoto,Mauricio Terrones
出处
期刊:Carbon
[Elsevier]
日期:2019-03-01
卷期号:143: 776-785
被引量:47
标识
DOI:10.1016/j.carbon.2018.11.024
摘要
Nitrogen-doped porous carbon monoliths (NDP-CMs) have long been pursued as the desirable supercapacitor electrode materials. However, the currently effective template methods and Lewis acid/base activation strategy suffer from the drawbacks of either high costs or tedious steps. We report on a simple and practicable novel method to the production of CNTs constructed NDP-CMs. Polyacrylonitrile (PAN) contained carbon nanotubes (CNTs), being dispersed into tubular level of dispersions (mono-dispersions), were used as the starting material and NDP-CMs were obtained through a direct carbonization process. First, PAN/CNT based mesostructured polymeric monoliths with interconnected networks were formed using a template-free temperature-induced phase separation (TTPS) method and the mono-dispersed CNTs networks act as the backbones of PAN molecules. Then, NDP-CMs with a surface area of 840 m2/g and a pore diameter 2.48 nm were obtained through heat treatment. Thus, the NDP-CMs based supercapacitor demonstrated a reversible specific capacitance of 246 F/g. Furthermore, pyridinic nitrogen and quaternary nitrogen species contribute significantly to the advantageous electrochemical activities of NDP-CMs.
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