Facile hydrothermal synthesis of zinc sulfide nanowires for high-performance asymmetric supercapacitor |
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| Institution: | 1. Department of Physics, Abdul Wali Khan University Mardan, Mardan 23200, KP, Pakistan;2. Interdisciplinary Research Center for Hydrogen and Energy Storage (IRC-HES), King Fahd University of Petroleum & Minerals, KFUPM Box 5040, Dhahran 31261, Saudi Arabia;3. Center for Integrative Petroleum Research, College of Petroleum Engineering and Geosciences, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia;4. Chemistry Department, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia;5. Nanosciences and Technology Department, National Centre for Physics, Quaid-e-Azam University Campus, Islamabad 45320, Pakistan;6. K.A.CARE Energy Research and Innovation Center, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia |
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| Abstract: | A facile, single-step hydrothermal route is followed to prepare ZnS nanowires with large aspect ratios. The obtained ZnS nanowires deposited on nickel foam (ZnS/Ni-foam) exhibit a specific capacitance of 781 F/g at a current density of 0.5 A/g. An asymmetric supercapacitor fabricated from ZnS/Ni-foam as a positive electrode and jute derived activated carbon coated on Ni-foam (JAC/Ni-foam) as a negative electrode attains a high specific capacitance of 573 F/g at a current density of 0.5 A/g, with an accompanying high energy density of 51 Wh/kg at a power density of 200 W/kg in an extensive operating potential window of 1.2 V. In addition, the ZnS//JAC asymmetric supercapacitor reveals long-term cyclic stability, after 10,000 GCD cycles the device sustain around ～87 % of the initial specific capacitance. These results shed enlighten a new opportunity for promising electrode materials in supercapacitors. |
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| Keywords: | ZnS nanowires Hydrothermal synthesis Jute derived activated carbon Asymmetric supercapacitor Electrochemical energy storage |
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