Charge Storage Capability of Tunnel MnO2 and Alkaline Layered Na-MnO2 as Anode Material for Aqueous Asymmetry Supercapacitor

Radhiyah, Abd Aziz and Rajan, Jose (2017) Charge Storage Capability of Tunnel MnO2 and Alkaline Layered Na-MnO2 as Anode Material for Aqueous Asymmetry Supercapacitor. Journal of Electroanalytical Chemistry, 799. pp. 538-546. ISSN 1572-6657. (Published)

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Abstract

We report here the charge storage capability of two different crystallographic structures of MnO2; tunnel and alkaline layered Na-MnO2 as a potential non-carbon based, high working potential electrode for supercapacitor applications. A hydrothermal route was used to prepare both materials. Further, XRD, FESEM, HRTEM, BET surface area analyzer and XPS techniques were used to characterize the physic-chemical property of the material. An electrochemical property of both materials was tested by cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD) tests in aqueous based electrolyte; alkaline and neutral. Then, the material was used to fabricate asymmetric supercapacitor (ASC) by employing the manganese based materials as an anode and commercial activated carbon (AC) as a cathode. Charge storage capabilities of both ASCs were then evaluated using CV and GCD tests. From the analysis, alkaline layered Na-MnO2//AC exhibits excellent electrochemical performance and its ASC could deliver energy density (Es) of 82 Wh/kg in 1 M of Na2SO4, which is comparable with previously obtained by manganese based ASC.

Item Type:	Article
Additional Information:	Indexes in Scopus
Uncontrolled Keywords:	Manganese oxide; Tunneled and layered structure; Energy storage; Asymmetric supercapacitor
Subjects:	T Technology > TS Manufactures
Faculty/Division:	Faculty of Industrial Sciences And Technology Faculty of Manufacturing Engineering
Depositing User:	Mr Mohamad Dzulazlan Azha
Date Deposited:	23 Aug 2017 08:15
Last Modified:	24 Jan 2018 07:06
URI:	http://umpir.ump.edu.my/id/eprint/18409
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