Layered Sodium Titanate Nanostructures as a New Electrode for High Energy Density Supercapacitors

M. M., Yusoff and Rajan, Jose and K. F., Chong and Radhiyah, Abd Aziz and Izan Izwan, Misnon (2013) Layered Sodium Titanate Nanostructures as a New Electrode for High Energy Density Supercapacitors. Electrochimica Acta, 113. pp. 141-148. ISSN 0013-4686. (Published)

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A flower-shaped hydrated layered sodium titanate material, Na2Ti2O4(OH)2, have been synthesized through a facile hydrothermal method and subsequently converted into sodium free titania (anatase). Potential application of the Na2Ti2O4(OH)2 as an electrode for supercapacitors under pseudo-capacitance storage mode is evaluated. The Na2Ti2O4(OH)2 showed sixfold higher specific capacitance (CS ∼ 300 F g−1) in an aqueous electrolyte than the anatase and demonstrated stable electrochemical cycling. This high CS is originated from a combination of electrochemical double layer and pseudo-capacitance storage mechanisms. The presence of hydrated layered within some loose interlayer plays an important role in assisting the diffusion process of ions as confirmed in electrical impedance spectroscopy analysis.

Item Type: Article
Additional Information: Indexed in Scopus, ISI. IF: 3.777
Uncontrolled Keywords: Alkali titanates; Electrochemistry; Energy storage; Renewable energy; Supercapacitor
Subjects: Q Science > Q Science (General)
Q Science > QD Chemistry
Faculty/Division: Faculty of Industrial Sciences And Technology
Depositing User: Prof. Dr. Mashitah Mohd Yusoff
Date Deposited: 24 Mar 2014 02:40
Last Modified: 27 Jul 2018 03:22
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