TY - JOUR
T1 - Electron beam irradiation dose dependent physico-chemical and electrochemical properties of reduced graphene oxide for supercapacitor
AU - Kang, Myunggoo
AU - Lee, Dong Heon
AU - Kang, Yong Mook
AU - Jung, Hyun
N1 - Publisher Copyright:
© 2015 Elsevier Ltd. All rights reserved.
PY - 2015/12/1
Y1 - 2015/12/1
N2 - Reduced graphene oxides (rGOs) with micropores were successfully obtained from a graphite oxide (GO) suspension in 2-propanol/water by electron beam irradiation at room temperature under ambient air conditions. During the radiolysis reaction, hydrated electrons (e-aq) were generated and acted as a reducing agent for the reduction of GO. The physico-chemical properties, such as disorder degree, oxygen content, specific surface area, pore structure, and sheet resistance of the rGOs were systematically controlled by adjusting the electron beam irradiation dose (50∼360 kGy). Especially, higher irradiation dose reduced the oxygen content, increased the specific surface area, and increased the number of micropores of rGO, which are important factors for supercapacitor performance. In order to investigate the electrochemical performance of the rGOs, electrochemical measurements were performed with a three-electrode system in 6.0 M KOH aqueous media. The highest capacitance of 206.8 F g-1 was achieved at a charge/discharge current density of 0.2 A g-1 in 6.0 M KOH aqueous solution for a sample reduced by electron beam irradiation of 200 kGy.
AB - Reduced graphene oxides (rGOs) with micropores were successfully obtained from a graphite oxide (GO) suspension in 2-propanol/water by electron beam irradiation at room temperature under ambient air conditions. During the radiolysis reaction, hydrated electrons (e-aq) were generated and acted as a reducing agent for the reduction of GO. The physico-chemical properties, such as disorder degree, oxygen content, specific surface area, pore structure, and sheet resistance of the rGOs were systematically controlled by adjusting the electron beam irradiation dose (50∼360 kGy). Especially, higher irradiation dose reduced the oxygen content, increased the specific surface area, and increased the number of micropores of rGO, which are important factors for supercapacitor performance. In order to investigate the electrochemical performance of the rGOs, electrochemical measurements were performed with a three-electrode system in 6.0 M KOH aqueous media. The highest capacitance of 206.8 F g-1 was achieved at a charge/discharge current density of 0.2 A g-1 in 6.0 M KOH aqueous solution for a sample reduced by electron beam irradiation of 200 kGy.
UR - http://www.scopus.com/inward/record.url?scp=84946085445&partnerID=8YFLogxK
U2 - 10.1016/j.electacta.2015.10.053
DO - 10.1016/j.electacta.2015.10.053
M3 - Article
AN - SCOPUS:84946085445
SN - 0013-4686
VL - 184
SP - 427
EP - 435
JO - Electrochimica Acta
JF - Electrochimica Acta
ER -