@article{ART002695577},
author={Lim Sungmook and HAN, Jonghun and Kang, Hyun Wook and Lee Jea Uk and Lee Wonoh},
title={Preparation of electrochemically exfoliated graphene sheets using DC switching voltages},
journal={Carbon Letters},
issn={1976-4251},
year={2020},
volume={30},
number={4},
pages={409-416},
doi={10.1007/s42823-019-00110-3}
TY - JOUR
AU - Lim Sungmook
AU - HAN, Jonghun
AU - Kang, Hyun Wook
AU - Lee Jea Uk
AU - Lee Wonoh
TI - Preparation of electrochemically exfoliated graphene sheets using DC switching voltages
JO - Carbon Letters
PY - 2020
VL - 30
IS - 4
PB - Korean Carbon Society
SP - 409
EP - 416
SN - 1976-4251
AB - Among various methods to produce graphene sheets, electrochemical exfoliation has been regarded as an efective method for the mass production of high-quality graphene sheets because of its simplicity and environmental friendliness. However, conventional electrochemical exfoliation has a disadvantage of accumulating intercalating ions at graphite interlayers owing to the use of a constant voltage. In this study, we developed a DC switching technique to achieve more efcient intercalation of ions than that in the conventional method. In the DC switching method, positive and negative voltages are successively applied to release the accumulated intercalating ions. By testing various conditions, we found the optimum switching time to produce high-quality graphene sheets with the highest yield rate and the highest electrical conductivity. As a result, the graphene sheets using this DC switching technique showed 85% higher yield rate, 193% higher electrical conductivity, 160% larger area, and 25% thinner thickness than those obtained when using a constant DC method. We believe that this DC switching technique can be used for large-scale production of high-quality graphene sheets.
KW - Graphene · Electrochemical exfoliation · DC switching technique · Intercalating ions · Electrical conductivity
DO - 10.1007/s42823-019-00110-3
ER -
Lim Sungmook, HAN, Jonghun, Kang, Hyun Wook, Lee Jea Uk and Lee Wonoh. (2020). Preparation of electrochemically exfoliated graphene sheets using DC switching voltages. Carbon Letters, 30(4), 409-416.
Lim Sungmook, HAN, Jonghun, Kang, Hyun Wook, Lee Jea Uk and Lee Wonoh. 2020, "Preparation of electrochemically exfoliated graphene sheets using DC switching voltages", Carbon Letters, vol.30, no.4 pp.409-416. Available from: doi:10.1007/s42823-019-00110-3
Lim Sungmook, HAN, Jonghun, Kang, Hyun Wook, Lee Jea Uk, Lee Wonoh "Preparation of electrochemically exfoliated graphene sheets using DC switching voltages" Carbon Letters 30.4 pp.409-416 (2020) : 409.
Lim Sungmook, HAN, Jonghun, Kang, Hyun Wook, Lee Jea Uk, Lee Wonoh. Preparation of electrochemically exfoliated graphene sheets using DC switching voltages. 2020; 30(4), 409-416. Available from: doi:10.1007/s42823-019-00110-3
Lim Sungmook, HAN, Jonghun, Kang, Hyun Wook, Lee Jea Uk and Lee Wonoh. "Preparation of electrochemically exfoliated graphene sheets using DC switching voltages" Carbon Letters 30, no.4 (2020) : 409-416.doi: 10.1007/s42823-019-00110-3
Lim Sungmook; HAN, Jonghun; Kang, Hyun Wook; Lee Jea Uk; Lee Wonoh. Preparation of electrochemically exfoliated graphene sheets using DC switching voltages. Carbon Letters, 30(4), 409-416. doi: 10.1007/s42823-019-00110-3
Lim Sungmook; HAN, Jonghun; Kang, Hyun Wook; Lee Jea Uk; Lee Wonoh. Preparation of electrochemically exfoliated graphene sheets using DC switching voltages. Carbon Letters. 2020; 30(4) 409-416. doi: 10.1007/s42823-019-00110-3
Lim Sungmook, HAN, Jonghun, Kang, Hyun Wook, Lee Jea Uk, Lee Wonoh. Preparation of electrochemically exfoliated graphene sheets using DC switching voltages. 2020; 30(4), 409-416. Available from: doi:10.1007/s42823-019-00110-3
Lim Sungmook, HAN, Jonghun, Kang, Hyun Wook, Lee Jea Uk and Lee Wonoh. "Preparation of electrochemically exfoliated graphene sheets using DC switching voltages" Carbon Letters 30, no.4 (2020) : 409-416.doi: 10.1007/s42823-019-00110-3