The Hierarchical Synthesis of a GrapheneVa-Bcn-Nt@Ws2 Composite Electrode for a Supercapacitor
First, multilayered graphene was grown on a nickel substrate using a CVD system under a vacuum. Secondly, VA-BCN-NTs were synthesized on the multilayered graphene by using a FCCVD method at 950°C. The specific capacitance of VA-BCN-NT was found to be 364 F g−1 at a current density of 0.5 A g−1. Secondly, the VA-BCN-NTs had 97% of their initial specific capacitance after 10,000 cycles at a current density of 20 A g−1, exhibiting excellent cyclic stability. Thirdly, WS2 nanosheets were grown on VA-BCN-NTs using a hydrothermal method. In the three-electrode cell, the specific capacitance of the VA-BCN-NT@WS2 electrode at a current density of 0.5 A g−1 was calculated to be 690 F g−1. After 5,000 cycles at a current density of 20 A g−1, the electrode structure had a capacitance value of 74%, showing good stability. In the two-electrode cell, the specific capacitance of the VA-BCN-NT@WS2 symmetrical supercapacitor at a current density of 1 A g−1 was found to be 170 F g−1. It was observed to have retained 85% of its capacitance after 10,000 cycles over a 1 V potential range. While the energy density of this structure was 23.6 Wh kg−1, the power density was 4250 W kg−1
Year of publication: |
[2022]
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Authors: | Yesilbag, Yasar Ozkan ; Tuzluca Yesilbag, Fatma Nur ; Huseyin, Ahmad ; Ertugrul, Mehmet |
Publisher: |
[S.l.] : SSRN |
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