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Highly stable supercapacitive performance of one-dimensional (1D) brookite TiO<sub>2</sub> nanoneedles

Highly stable supercapacitive performance of one-dimensional (1D) brookite TiO2 nanoneedles

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DEVAN, Rupesh S., Yuan-Ron MA, Ranjit A. PATIL, Lukas SCHMIDT-MENDE, 2016. Highly stable supercapacitive performance of one-dimensional (1D) brookite TiO2 nanoneedles. In: RSC Advances. 6(67), pp. 62218-62225. eISSN 2046-2069. Available under: doi: 10.1039/c6ra11348f

@article{Devan2016Highl-35962, title={Highly stable supercapacitive performance of one-dimensional (1D) brookite TiO2 nanoneedles}, year={2016}, doi={10.1039/c6ra11348f}, number={67}, volume={6}, journal={RSC Advances}, pages={62218--62225}, author={Devan, Rupesh S. and Ma, Yuan-Ron and Patil, Ranjit A. and Schmidt-Mende, Lukas} }

We report the highly stable supercapacitive performance of one-dimensional (1D) nanoneedles of brookite (β) TiO<sub>2</sub> synthesized on a conducting glass substrate. The 1D β-TiO<sub>2</sub> nanoneedles synthesized over a large area array utilizing hot-filament metal vapor deposition (HFMVD) were ∼24–26 nm wide, ∼650 nm long and tapered in a downward direction. X-ray photoemission spectroscopy (XPS) revealed their chemical properties and stoichiometric Ti and O composition. The 1D β-TiO<sub>2</sub> nanoneedles execute as parallel units for charge storage, yielding a specific capacitance of 34.1 mF g<sup>−1</sup>. Electrochemical impedance spectroscopy revealed that the large surface area and brookite crystalline nature of the 1D nanoneedles provided easy access to Na<sup>+</sup> ions, and resulted in low diffusion resistance, playing a key role in their stable charging–discharging electrochemical mechanism. Moreover, the non-faradic mechanism of these nanoneedles delivered better durability and high stability up to 10 000 cycles, and a columbic efficiency of 98%. Therefore, 1D β-TiO<sub>2</sub> nanoneedles hold potential as an electrode material for highly stable supercapacitive performance with long cycle lifetime. Devan, Rupesh S. 2016 Schmidt-Mende, Lukas 2016-11-18T13:29:29Z Highly stable supercapacitive performance of one-dimensional (1D) brookite TiO<sub>2</sub> nanoneedles Patil, Ranjit A. Schmidt-Mende, Lukas Ma, Yuan-Ron 2016-11-18T13:29:29Z Devan, Rupesh S. Ma, Yuan-Ron Patil, Ranjit A. eng

Dateiabrufe seit 18.11.2016 (Informationen über die Zugriffsstatistik)

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