Nitrogen-and Oxygen-Containing Porous Ultrafine Carbon Nanofiber:A Highly Flexible Electrode Material for Supercapacitor
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2017年第5期
论文作者：Kai Wei Kyu-Oh Kim Kyung-Hun Song Chang-Yong Kang Jung Soon Lee Mayakrishnan Gopiraman Ick-Soo Kim
文章页码：424 - 431
摘 要：Herein, we report a simple and effective preparation of ultrafine CNFs（u-CNFs） with high surface area via electrospinning of two immiscible polymers [polyacrylonitrile（PAN） and poly（methyl methacrylate）（PMMA）] followed by calcination at high temperature in an inert atmosphere. Various electrospinning conditions were optimized in detail. Four different kinds of PAN/PMMA ratios（10/0, 7:3, 5:5 and 3:7）were chosen and found that the PAN/PMMA ratio of 3:7（PAN/PMMA-3:7） is the optimum one. BET analysis showed the specific surface area of the u-CNFs-3:7 was 467.57 m2/g with an excellent pore volume(1.15 cm3g-1) and an average pore size（9.48 nm）: it is about 25 times higher than the conventional CNFs（c-CNFs）. TEM and FE-SEM images confirmed the ultrafine structure of the CNFs with a thinner fiber diameter of 50 nm. The graphitic nature and atomic arrangement of the u-CNFs were investigated by Raman and XPS analyses. For the supercapacitor application, unlike the common electrode preparation methods,the u-CNFs-3:7 was used without any activation, chemical or mechanical modifications. The u-CNFs-3:7 showed a better specific capacitance of 86 F/g in 1 mol/L H2SO4 when compared to pure CNFs. The excellent physicochemical properties make the u-CNFs-3:7 an alternative choice to the existing CNFs for the supercapacitors.
Kai Wei1,2，Kyu-Oh Kim3，Kyung-Hun Song4，Chang-Yong Kang5，Jung Soon Lee6，Mayakrishnan Gopiraman2，Ick-Soo Kim2
1. College of Textile and Clothing Engineering, Soochow University2. Nano Fusion Technology Research Group, Division of Frontier Fibers, Institute for Fiber Engineering (IFES), Interdisciplinary Cluster for Cutting Edge Research (ICCER), Shinshu University3. Department of Fiber System Engineering, Dankook University4. Department of Clothing & Textiles, Pai Chai University5. Department of Metallurgical Engineering, Pukyong National University6. Department of Clothing and Textiles, Chungnam National University
摘 要：Herein, we report a simple and effective preparation of ultrafine CNFs（u-CNFs） with high surface area via electrospinning of two immiscible polymers [polyacrylonitrile（PAN） and poly（methyl methacrylate）（PMMA）] followed by calcination at high temperature in an inert atmosphere. Various electrospinning conditions were optimized in detail. Four different kinds of PAN/PMMA ratios（10/0, 7:3, 5:5 and 3:7）were chosen and found that the PAN/PMMA ratio of 3:7（PAN/PMMA-3:7） is the optimum one. BET analysis showed the specific surface area of the u-CNFs-3:7 was 467.57 m2/g with an excellent pore volume(1.15 cm3g-1) and an average pore size（9.48 nm）: it is about 25 times higher than the conventional CNFs（c-CNFs）. TEM and FE-SEM images confirmed the ultrafine structure of the CNFs with a thinner fiber diameter of 50 nm. The graphitic nature and atomic arrangement of the u-CNFs were investigated by Raman and XPS analyses. For the supercapacitor application, unlike the common electrode preparation methods,the u-CNFs-3:7 was used without any activation, chemical or mechanical modifications. The u-CNFs-3:7 showed a better specific capacitance of 86 F/g in 1 mol/L H2SO4 when compared to pure CNFs. The excellent physicochemical properties make the u-CNFs-3:7 an alternative choice to the existing CNFs for the supercapacitors.
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