期刊
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
卷 124, 期 9, 页码 -出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s00339-018-1937-2
关键词
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资金
- University Grants Commission (UGC) New Delhi, INDIA
- Human Resources Development program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) Grant - Korea government Ministry of Trade, Industry and Energy [20124010203180]
- Korea Research Fellowship Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [2016H1D3 A1909289]
- Priority Research Centers Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology [2018R1A6A1A03024334]
In the present study, the simple facile chemical approaches have been used to grow one dimensional (1D) titanium dioxide (TiO2) nanotubes and three dimensional (3D) microflowers over 1D (3D-1D) TiO2 hierarchical for supercapacitor. Here, 1D TiO2 nanotubes are synthesized by electrochemical anodization and 3D-1D TiO2 microflowers have been successfully synthesized by hydrothermally grown 3D microflowers on predeposited 1D TiO2 nanotubes. Furthermore, TiO2 films have been characterized by X-ray diffraction, field emission scanning electron microscopy, energy dispersive X-ray spectrometry, contact angle measurements and electrochemical properties. The specific capacitance (Cs) values of 1D TiO2 and 3D-1D TiO2 have been calculated by cyclic voltammetry and charge discharge measurements. The improvement in Cs for 3D-1D nanostructure has been observed around 66.50 Fg(-1), which is greater than that of 1D nanostructure 54.09 Fg(-1) at 5 mV S-1 scan rate. Stability study revealed similar to 67% capacitance retention for 1D TiO2 nanotubes and 76% capacitance retention for 3D-1D TiO2 microflowers after 2000 cycles. These results indicate that the growth of 3D-1D TiO2 microflowers showed better performance than 1D TiO2 nanotubes for supercapacitor application.
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