材料科学
碳纳米纤维
聚丙烯腈
静电纺丝
纳米纤维
超级电容器
电解质
碳化
化学工程
比表面积
复合数
碳纤维
多孔性
电极
纳米技术
电容
复合材料
碳纳米管
扫描电子显微镜
催化作用
化学
有机化学
聚合物
物理化学
工程类
作者
Qinting Jiang,Xin Pang,Shitao Geng,Yuhui Zhao,Xiaomei Wang,Hua Qin,Bo Liu,Jin Zhou,Tong Zhou
标识
DOI:10.1016/j.apsusc.2019.02.077
摘要
Large effective surface area and high electrical conductivity are critical for the high-performance carbon-based electrode materials for supercapacitors. Herein, three-dimensional (3D) cross-linked nitrogen-enriched porous carbon nanofibers (C-CNFs) are facilely prepared by electrospinning of polyacrylonitrile/zinc chloride (PAN/ZnCl2) precursor, preoxidation and carbonization of the electrospun composite nanofibers. The ZnCl2 additive makes effects of both cross-linking and pore-forming electrospun carbon nanofibers simultaneously. The as-prepared C-CNFs exhibits a good rate capability of about 60% with current densities ranging from 1 to 60 A g−1, excellent cycling stability of 97.3% over 60,000 cycles in alkaline electrolyte, and high specific capacitance of 214 F g−1 at 1.0 A g−1 in acidic electrolyte, all of which are significantly superior to the non-cross-linked carbon nanofibers. The significant enhancement of capacitive performance of C-CNFs can be attributed the synergistic effect of its enlarged specific surface area for more charge accumulation and cross-linked architecture that enable the electrons to fast transfer throughout the fibrous membrane. Moreover, the 3D cross-linked carbon nanofiber networks is expected to be a building block of composite electrodes fabrication for the promising applications in other systems that involve a continuous pathway for electron transport, such as the metal ion batteries and catalysis.
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