W18O49 nanowires-graphene nanocomposite for asymmetric supercapacitors employing AlCl3 aqueous electrolyte

Thalji, Mohammad R. and Ali, Gomaa A. M. and Liu, Porun and Zhong, Yu Lin and K. F., Chong (2021) W18O49 nanowires-graphene nanocomposite for asymmetric supercapacitors employing AlCl3 aqueous electrolyte. Chemical Engineering Journal, 409 (128216). pp. 1-11. ISSN 1385-8947. (Published)

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W18O49 nanowires (NWs)-reduced graphene oxide (rGO) nanocomposite is examined as a new active material for supercapacitors electrode, which reveals its high specific capacitance and excellent rate performance in AlCl3 aqueous electrolyte. Electrochemical studies show that the presence of rGO enhances Al3+ ions diffusion in the nanocomposite, thus provides more ions for intercalation pseudocapacitance. The fabrication of asymmetric supercapacitor W18O49 NWs-rGO//rGO demonstrates high specific capacitance of 365.5 F g−1 at 1 A g−1 and excellent cycling stability with 96.7% capacitance retention at 12,000 cycles. Interestingly, it delivers high energy density of 28.5 Wh kg−1 and power density of 751 W kg−1, which is the highest energy density value for all reported W18O49-based supercapacitor device. The work explores W18O49 NWs-rGO nanocomposite as a new electrode material for supercapacitors application with superior electrochemical performance, which may open up a new direction for high-performance energy storage in Al3+ electrolyte.

Item Type: Article
Uncontrolled Keywords: Asymmetric supercapacitor; Energy density; Graphene; Intercalation pseudocapacitance; Tungsten oxide
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Faculty/Division: Faculty of Industrial Sciences And Technology
Depositing User: Noorul Farina Arifin
Date Deposited: 14 Sep 2021 03:09
Last Modified: 14 Sep 2021 03:09
URI: http://umpir.ump.edu.my/id/eprint/32019
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