期刊
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
卷 15, 期 5, 页码 4602-4618出版社
ESG
DOI: 10.20964/2020.05.72
关键词
iron oxide; carbon nanofibers; pore structure; liquefied carbon; supercapacitors
资金
- National Natural Science Foundation of China [21567015, 21407072]
- National Key R&D Program of China [2016YFC0202900]
- Natural Science Foundation of Gansu Province [17JR5RA109]
- Gansu Provincial Party Committee Young Creative Talents [Ganzutongzi[2017]121]
- Gansu Provincial Institutions of Higher Learning Innovation Ability Promotion Project [2019A-220]
- Food and Drug Research Project of Gansu Province [2018GSFDA014]
- Hongliu Science Fund for Distinguished Young Scholars
- Lanzhou University of Technology Hongliu First-class Discipline Construction Program
Fe3O4/porous carbon nanofibre (Fe3O4/CNF) was prepared by carbonization of electrospun polyacrylonitrile (PAN)/polymethylmethacrylate (PMMA) composite nanofibres and used as electrode materials for supercapacitors. The introduction of PMMA as a pore- forming agent in PAN results in an optimum pore distribution and a more suitable specific surface area for Fe3O4/CNF; the improved pores and surface area contribute to the diffusion of the electrolyte from the surface to the inside of the electrode material. Electrochemical measurements of the Fe3O4/CNF in three- and two- electrode systems reveal a maximum specific capacitance of 540 F g(-1) in the three-electrode system and a capacitance retention of 76.3 % after 5000 continuous cycles in the two-electrode system. Due to the synergistic effect of redox pseudocapacitance behaviour and bilayer capacitance, the excellent electrochemical performance of the Fe3O4/CNF electrode highlights the importance of adding PMMA into composite materials.
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