Facile Growth Of Carbon Nanaotube Electrode From Electroplated Ni Catalyst For Supercapacitor

 Visittapong Yordsri1, 2, Winadda Wongwiriyapan1, 3, 4*, Chanchana Thanachayanont2

1College of Nanotechnology, King Mongkut’s Institute of Technology Ladkrabang,  Chalongkrung Rd., Ladkrabang, Bangkok, Thailand

2National Metal and Materials Technology Center, 114 Thailand Science Park,  Paholyothin Rd., Klong 1, Klong Luang, Pathumthani, Thailand 

3Nanotec-KMITL Center of Excellence on Nanoelectronic Device, Chalongkrung Rd., Ladkrabang, Bangkok, Thailand

4Thailand Center of Excellence in Physics, CHE, Si Ayutthaya Rd., Bangkok, Thailand  

Adv. Mater. Lett., 2015, 6 (6), pp 501-504

DOI: 10.5185/amlett.2015.SMS6

Publication Date (Web): May 28, 2015

E-mail: kwwinadd@kmitl.ac.th


A facile growth of carbon nanotubes (CNTs) was facilitated by the use of direct-current plating technique for catalyst preparation. Ni nanoparticles (NPs) were deposited on Cu foil at different applied voltages of 1.0, 1.5 and 2.0 V. The Ni-deposited foil was subsequently used as catalyst for CNTs synthesis by chemical vapour deposition (CVD) method. CVD was carried out at 800 ºC using ethanol as carbon source. A voltage of 1.5 V was the optimum condition to deposit uniform Ni NPs that had a narrow size distribution of 55±3 nm, which in turn, yielded synthesized CNTs with a uniform diameter of approximately 60±5 nm with graphitic layers parallel to the CNTs axis. On the other hand, electroplated Ni at 1.0 V produced CNTs with graphitic layers at an angle to the CNTs axis, while electroplated Ni at 2.0 V produced curly CNTs with a wide distribution of diameters. These results show that Ni NPs size distribution could be controlled by electroplated voltage. Our observation was that Ni NPs with a narrow distribution of sizes and a uniform diameter is a key to uniform CNT synthesis. Furthermore, the synthesized CNTs electrode shows a faradic pseudo capacitance property, which can be attributed to the existence of oxidized Ni NPs. These results propose that the synthesized CNTs are promising materials for future super capacitor application. The optimization of ratio of Ni NPs and CNTs may improve the supercapacitors performance.



Electroplating, carbon nanotube, chemical vapor deposition, pseudocapacitor.

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