Abstract
Carbon nanofiber is a well-known carbon nanostructure employed in flexible supercapacitor electrode. Despite recent developments, improvement in the performance of carbon nanofiber-based electrode is still the subject of intense research. We investigated the supercapacitor performance of porosity-induced carbon nanofibers (CNFs). The fabrication process involves electrospinning, calcination, and subsequent etching. The porous CNF not only delivers a higher capacitance of 248 F/g at a current density of 1 A/g, but also exhibits a higher rate performance of 73.54%, lower charge transfer resistance and only 1.1% capacitance loss after 2000 charge-discharge cycles, compared to pristine CNF. The excellent electrochemical behavior of porous CNF is correlated with the degree of graphitization, a higher volume of mesopores, and enhanced surface area. The as-fabricated symmetric device comprising porous CNF exhibits an energy density of 9.9 Wh/kg, the power density of 0.69 kW/kg and capacitance retention of 89% after 5000 charge-discharge cycles. The introduction of porosity in CNFs is a promising strategy to achieve high-performance supercapacitor electrode.
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Ghosh, S., Yong, W.D., Jin, E.M. et al. Mesoporous carbon nanofiber engineered for improved supercapacitor performance. Korean J. Chem. Eng. 36, 312–320 (2019). https://doi.org/10.1007/s11814-018-0199-1
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DOI: https://doi.org/10.1007/s11814-018-0199-1