Journal
JOURNAL OF MATERIALS SCIENCE
Volume 57, Issue 20, Pages 9357-9369Publisher
SPRINGER
DOI: 10.1007/s10853-022-07215-7
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Funding
- National Natural Science Foundation of China [22006126]
- Shandong Natural Science Foundation [ZR2020QB200]
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Flexible and appropriate N, S co-doped electrospinning carbon nanofiber nonwovens with amazing cross-linked architecture were successfully achieved through a simple and practicable approach. These nanostructures exhibit high capacity and outstanding rate performance, along with excellent capacitance retention rate, making them promising for supercapacitor applications.
Flexible, appropriate N, S co-doped electrospinning carbon nanofiber nonwovens with amazing cross-linked architecture (N, S-CLPACF) are successfully achieved in a simple and practicable approach involving the electrospinning of preasphaltene derived from the coal liquefaction residue/polyacrylonitrile/terephthalic acid composite precursor, followed by stabilization, (NH4)(2)SO4 soaking and carbonation. The degree of cross-link in the structures could be easily adjusted by modulating the temperature during the stabilization. Due to the synergistic action of efficient inter-bonded structures, short charge transfer channels and heteroatom doping, the N, S-CLPACF electrode exhibits a high capacity of 267 F g(-1) at 0.2 A g(-1) and an outstanding rate capacity of 178 F g(-1) at 100 A g(-1). A symmetrical supercapacitor assembled using the N, S-CLPACF electrode delivers a high energy density of 4.7 Wh kg(-1) at a power density of 1.2 kW kg(-1) and shows a capacitance retention rate of 98% after 10000 cycles at 2 A g(-1).
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