Particle and Aerosol Research
Vol. 12, No. 4, December 2016, Pages 127-134
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ISSN : 1738-8716 (Print)
ISSN : 2287-8130 (Online)
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Synthesis of Multiwall Carbon Nanotube/Graphene Composite by Aerosol Process and Its Characterization for Supercapacitors
Eun Hee Jo1),2), Sun Kyung Kim1), Hankwon Chang1),2), Chong Min Lee1), Su-Ryeon Park1), Ji-hyuk Choi2), and Hee Dong Jang1),2),*
1)Resources Utilization Research Center, Korea Institute of Geoscience & Mineral Resources,
2)Department of Nanomaterials Science and Engineering, University of Science & Technology
*Corresponding author.
Tel.: +82-42-868-3612, E-mail: hdjang@kigam.re.kr
Received 30 September 2016, Revised 21 December 2016, Accepted 25 December 2016, Available online 05 January 2017
http://dx.doi.org/10.11629/jpaar.2016.12.31.127
Abstracts
A multiwall carbon nanotube (MWCNT)/graphene (GR) composite was synthesized for an enhanced supercapacitor. Aerosol spray pyrolysis (ASP) was employed to synthesize the MWCNT/GR composites using a colloidal mixture of MWCNT and graphene oxide (GO). The effect of the weight ratio of the MWCNT/GO on the particle properties including the morphology and layered structure were investigated. The morphology of MWCNT/GR composites was generally the shape of a crumpled paper ball, and the average composite size was about 5 ¥ìm. MWCNT were uniformly dispersed in GR sheets and the MWCNT not only increase the basal spacing but also bridge the defects for electron transfer between GR sheets. Thus, it was increasing electrolyte/electrode contact area and facilitating transportation of electrolyte ion and electron in the electrode. Electrochemical data demonstrate that the MWCNT/GR (weight ratio=0.1) composite possesses a specific capacitance of 192 F/g at 0.1 A/g and good rate capability (88% capacity retention at 4 A/g) using two-electrode testing system.
Keywords
Supercapacitor, MWCNT/Graphene, aerosol spray pyrolysis
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