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High performance supercapacitor based on Ni3S2/carbon nanofibers and carbon nanofibers electrodes derived from bacterial cellulose.
- Source :
-
Journal of Power Sources . Dec2014, Vol. 272, p137-143. 7p. - Publication Year :
- 2014
-
Abstract
- The Ni 3 S 2 nanoparticles have been successfully grown on the carbon nanofibers (CNFs) derived from bacterial cellulose via a hydrothermal method, which the as-prepared composite exhibited high specific capacitance (883 F g −1 at 2 A g −1 ), much more than CNFs (108 F g −1 at 2 A g −1 ), and good cycle stability. The asymmetric supercapacitor was designed to contain the CNFs coated Ni 3 S 2 nanoparticles (Ni 3 S 2 /CNFs) as positive electrode and CNFs as negative electrode in 2 M KOH electrolyte. Due to the synergistic effects of the two electrodes, asymmetric cell showed superior electrochemical performances. The optimized asymmetric supercapacitor gave a operating potential of 1.7 V in 2 M KOH aqueous solution, exhibiting a high specific capacitance of 56.6 F g −1 at 1 A g −1 and considerably high energy density of 25.8 Wh kg −1 at a power density of 425 W kg −1 . Meanwhile, Ni 3 S 2 /CNFs//CNFs asymmetric supercapacitor showed excellent cycling stability with 97% specific capacitance retained after 2500 cycles. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03787753
- Volume :
- 272
- Database :
- Academic Search Index
- Journal :
- Journal of Power Sources
- Publication Type :
- Academic Journal
- Accession number :
- 98807581
- Full Text :
- https://doi.org/10.1016/j.jpowsour.2014.08.064