期刊
ELECTROCHIMICA ACTA
卷 274, 期 -, 页码 112-120出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2018.04.064
关键词
Porphyrin; Nanofiber; Carbon nanotube; Supercapacitor; Non-covalent interaction; Capacitance
资金
- National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [NRF-2016R1C1B2008694]
- Nano-Material Fundamental Technology Development through National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [2016M3A7B4909370]
Herein, a new fabrication method for CNT nanofiber composite (pPC-FP) through non-covalent interaction between porphyrin monomers with CNTs is reported. This led to the alleviated agglomeration of pristine CNT without acid pre-treatment, producing a highly porous material with high surface area of 444 m(2)/g and narrow pore size distribution for all pPC-FP nanofiber composites. Enhanced performances of pPC-FP3 and pPC-FP5 (CNT nanofiber with porphyrin monomers) were brought about by the enhanced CNT dispersion, hence, better porosity as compared to pPC. Moreover, through the incorporation of porphyrin monomer, M-NeC bond was simultaneously formed and served as a contributor to the excellent capacitive performance of the material, resulting in the highest capacitance of 150 A/cm(2) at 0.25 mAh/cm(2) with 77 A/cm(2) at 2.5 mAh/cm(2). The composites also exhibited stable performance even after cycling at different current densities (0.25-2.5 mAh/cm(2)) for 3000 cycles with almost 100% columbic efficiency. Through p-p stacking interaction, the agglomeration was prevented and CNT was aligned along the axis of the polymer which rendered the nanofibers highly porous resulting to a conductive composite material with excellent electrochemical performance. (C) 2018 Elsevier Ltd. All rights reserved.
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