Facile Route to NiO Nanostructured Electrode Grown by Oblique Angle Deposition Technique for Supercapacitors.
We report an efficient method for growing NiO nanostructures by oblique angle deposition (OAD) technique in an e-beam evaporator for supercapacitor applications. This facile physical vapor deposition technique combined with OAD presents a unique, direct, and economical route for obtaining high width-to-height ratio nanorods for supercapacitor electrodes. The NiO nanostructure essentially consists of nanorods with varying dimensions. The sample deposited at OAD 75° showed highest supercapacitance value of 344 F/g. NiO nanorod electrodes exhibits excellent electrochemical stability with no degradation in capacitance after 5000 charge-discharge cycles. The nanostructured film adhered well to the substrate and had 131% capacity retention. Peak energy density and power density of the NiO nanorods were 8.78 Wh/kg and 2.5 kW/kg, respectively. This technique has potential to be expanded for growing nanostructured films of other interesting metal/metal oxide candidates for supercapacitor applications.
Millimeter-wave Innovation Technology Research Center (MINT), Dongguk University , Seoul 04620, Korea.
Vasudevan
V
Kannan
Division of Physics and Semiconductor Science, Dongguk University , Seoul 04620, Korea.
Akbar I
AI
Inamdar
Division of Physics and Semiconductor Science, Dongguk University , Seoul 04620, Korea.
Sambaji M
SM
Pawar
Division of Electronics and Electrical Engineering, Dongguk University , Seoul 04620, Korea.
Hyun-Seok
HS
Kim
Division of Electronics and Electrical Engineering, Dongguk University , Seoul 04620, Korea.
Hyun-Chang
HC
Park
Division of Physics and Semiconductor Science, Dongguk University , Seoul 04620, Korea.
Hyungsang
H
Kim
Division of Physics and Semiconductor Science, Dongguk University , Seoul 04620, Korea.
Hyunsik
H
Im
Department of Computer Application, Seoil University , Seoul, Korea.
Yeon Sik
YS
Chae
NiO; e-beam evaporation; electrochemical supercapacitor; nanostructures; oblique angle deposition