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Fabrication of TiO2-Nanotube-Array-Based Supercapacitors

Ahmed, Faheem; Pervez, Syed A. 1; Aljaafari, Abdullah; Alshoaibi, Adil; Abuhimd, Hatem; Oh, JooHyeon; Koo, Bon Heun
1 Center for Electrochemical Energy Storage Ulm & Karlsruhe (CELEST), Karlsruher Institut für Technologie (KIT)


In this work, a simple and cost-effective electrochemical anodization technique was adopted to rapidly grow TiO₂ nanotube arrays on a Ti current collector and to utilize the synthesized materials as potential electrodes for supercapacitors. To accelerate the growth of the TiO₂ nanotube arrays, lactic acid was used as an electrolyte additive. The as-prepared TiO₂ nanotube arrays with a high aspect ratio were strongly adhered to the Ti substrate. X-ray diffraction (XRD) and transmission electron microscopy (TEM) results confirmed that the TiO₂ nanotube arrays were crystallized in the anatase phase. TEM images confirmed the nanotublar-like morphology of the TiO₂ nanotubes, which had a tube length and a diameter of ~16 and ~80 nm, respectively. The electrochemical performance of the TiO₂ nanotube array electrodes was evaluated using the cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and galvanostatic charge/discharge (GCD) measurements. Excellent electrochemical response was observed for the electrodes based on the TiO₂ nanotube arrays, as the cells delivered a high specific capacitance of 5.12 mF/cm² at a scan rate of 100 mV/s and a current density of 100 μA/cm². ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000105068
Veröffentlicht am 16.01.2020
DOI: 10.3390/mi10110742
Zitationen: 7
Web of Science
Zitationen: 6
Zitationen: 8
Cover der Publikation
Zugehörige Institution(en) am KIT Helmholtz-Institut Ulm (HIU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2019
Sprache Englisch
Identifikator ISSN: 2072-666X
KITopen-ID: 1000105068
HGF-Programm 37.01.01 (POF III, LK 01) Fundamentals and Materials
Erschienen in Micromachines
Verlag MDPI
Band 10
Heft 11
Seiten Art. Nr.: 742
Vorab online veröffentlicht am 31.10.2019
Schlagwörter TiO2, nanotubes, supercapacitors, transmission electron microscopy (TEM), electrochemical
Nachgewiesen in Web of Science
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