Nitrogen-Enriched Porous Carbon Nanofiber Mat as Efficient Flexible Electrode Material for Supercapacitors

被引:75
作者
Choudhury, Arup [1 ]
Kim, Ji-Hoon [2 ]
Mahapatra, Susanta Sinha [3 ]
Yang, Kap-Seung [2 ]
Yang, Duck-Joo [4 ,5 ]
机构
[1] Birla Inst Technol, Dept Chem Engn, Ranchi 835215, Bihar, India
[2] Chonnam Natl Univ, Sch Polymer Sci & Engn, 77 Yongbong Ro, Gwangju 500757, South Korea
[3] Birla Inst Technol, Dept Chem, Ranchi 835215, Bihar, India
[4] Univ Texas Dallas, Dept Chem, 800 West Campbell Rd, Richardson, TX 75080 USA
[5] Univ Texas Dallas, Alan G MacDiarmid NanoTech Inst, 800 West Campbell Rd, Richardson, TX 75080 USA
关键词
Poly(m-aminophenol); Polyacrylonitrile; Electrospinning; Carbon nanofibers; Specific capacitance; Supercapacitors; HIGH-PERFORMANCE SUPERCAPACITORS; ENERGY-DENSITY SUPERCAPACITORS; LITHIUM-ION BATTERIES; ELECTROCHEMICAL PROPERTIES; POLYMER BLENDS; RATE CAPABILITY; DOPED CARBON; CAPACITY; STORAGE; OXYGEN;
D O I
10.1021/acssuschemeng.6b02031
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Freestanding nitrogen-doped porous carbon nanofiber (NCNF) mats were prepared by electrospinning polyacrylonitrile/ poly(m-aminophenol) (PAN/PmAP) precursor blends with different polymeric compositions followed by thermal stabilization and carbonization. The morphology, pore structure, and surface elemental compositions of as-prepared NCNFs were characterized by different techniques such as scanning electron microscopy, transmission electron microscopy, N-2 adsorption, Raman spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The charge-storage capability of the fabricated NCNFs was investigated in KOH electrolyte. The electrochemical performances of NCNFs were evaluated by varying the PmAP loading in the blend compositions. The highest specific capacitance of 347.5 F g(-1) at 0.5 mA cm(-2) together with a capacitance retention of 173.2 F g(-1) at 20 mA cm(-2) was achieved for the PAN:PmAP (85:15 w/w) NCNFs (NCNF85:15). The volumetric capacitance of 200.8 F cm(-3) at 0.5 mA cm(-2) was recorded for NCNF85.15. The NCNF85:15 showed the maximum energy density of 12.1 Wh kg(-1) at 0.093 kW kg(-1) and good cycling stability with 90.5% capacitance retention after 10 000 cycles. The excellent capacitive performances of the NCNF85:5 were attributed to high effective surface area, high content of mesoporosity, good conducvity, and high fraction of heteroatom-doped carbon, which result in both electrochemical double-layer and Faradaic capacitance contributions.
引用
收藏
页码:2109 / 2118
页数:10
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