Facile fabrication of thin metal oxide films on porous carbon for high density charge storage

Vijayan, Bincy Lathakumary and Izan Izwan, Misnon and Anilkumar, Gopinathan M. and Miyajima, Kieta and Reddy, M. V. and Zaghib, Karim and Yang, Chun-Chen and Karuppaiah, Chelladurai and Rajan, Jose (2020) Facile fabrication of thin metal oxide films on porous carbon for high density charge storage. Journal of Colloid and Interface Science, 562. pp. 567-577. ISSN 0021-9797. (Published)

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In an effort to minimize the usage of non-renewable materials and to enhance the functionality of the renewable materials, we have developed thin metal oxide coated porous carbon derived from a highly abundant non-edible bio resource, i.e., palm kernel shell, using a one-step activation-coating procedure and demonstrated their superiority as a supercapacitive energy storage electrode. In a typical experiment, an optimized composition contained ~10 wt.% of Mn2O3 on activated carbon (AC); a supercapacitor electrode fabricated using this electrode showed higher rate capability and more than twice specific capacitance than pure carbon electrode and could be cycled over 5000 cycles without any appreciable capacity loss in 1 M Na2SO4 electrolyte. A symmetric supercapacitor prototype developed using the optimum electrode showed nearly four times higher energy density than the pure carbon owing to the enhancements in voltage window and capacitance. A lithium ion capacitor fabricated in half-cell configuration using 1 M LiPF6 electrolyte showed larger voltage window, superior capacitance and rate capability in the ~10 wt.% Mn2O3@AC than the pure analogue. These results demonstrate that the current protocol allows fabrication of superior charge storing electrodes using renewable materials functionalized by minimum quantity of earthborn materials.

Item Type: Article
Additional Information: Indexed by Scopus & WOS
Uncontrolled Keywords: Electrochemical double layer capacitors; Energy storage materials; Renewable energy; Waste biomass valorisation; Sustainable materials
Subjects: Q Science > QC Physics
Q Science > QD Chemistry
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Faculty/Division: Faculty of Industrial Sciences And Technology
Institute of Postgraduate Studies
Depositing User: Prof. Dr. Jose Rajan
Date Deposited: 07 Jul 2020 01:42
Last Modified: 07 Sep 2020 02:14
URI: http://umpir.ump.edu.my/id/eprint/28499
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