Abstract
AbstractCoFe2O4 composite carbon nanofibers (CoFe2O4@CNFs) are prepared by electrospinning combined with pre‐oxidation, carbonization, and extra annealing under air conditions. The effect of different extra annealing times on the structure, morphology, and electrochemical properties of the resulting CoFe2O4@CNFs are investigated. CoFe2O4@CNFs (named as CFO/C‐800‐2) with a spinel structure are successfully prepared after 2 h of extra annealing for CFO/C‐800‐0. CFO/C‐800‐2 shows a mesoporous structure with a mesoporous area of 358 m2 g−1. CFO/C‐800‐2 shows pseudocapacitance characteristics with a specific capacity of 591.8 F g−1 at a current density of 1 A g−1. The capacitance retention rate of the asymmetric supercapacitor assembled by CFO/C‐800‐2 with activated carbon (AC) can reach 87 % in the 0–1.7 V voltage window, and the energy density is 21.4 Wh Kg−1 at a power density of 850 W Kg−1 after 7000 cycles.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.