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|
| Type |
Poster Presentation |
| Area |
Material Chemistry |
| Room No. |
Exhibition Hall 2 |
| Time |
4월 19일 (금요일) 11:00~12:30 |
| Code |
MAT.P-425 |
| Subject |
Evaluating the electrical quality of powder-type graphene materials |
| Authors |
Ha-Jin Lee*, Hyokyung Jeon, Haeseong Lee1
Western Seoul Center, Korea Basic Science Institute, Korea
1Department of Nano & Advanced Materials Engineerin, Jeonju University, Korea
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| Abstract |
A test method to evaluate the quality of powder-type graphene products such as reduced graphene oxide (rGO) and graphene nanopowder (GNP) was developed in this study. The pelletizer was selected for a sampling tool, which enables us to formulate the product as a measurable sample. Various parameters were measured from the pelletized sample in order to elucidate the best parameter for representing the quality of the graphene flakes in terms of their electrical properties. Based on the analysis of 4-probe measurement data on the pelletized sample, the best intrinsic parameter is volume resistivity (or volume conductivity) rather than resistivity (or conductivity). In addition, the possible modification of a sample before and after pressurization was investigated by electron microscopy and Raman spectroscopy. Any significant modification was not observed. The volume conductivity in the two types of the graphene was different from their individual conductivities by one order of magnitude. It was governed by the oxygen content included in the sample based on the results of X-ray photoelectron spectroscopy and Raman spectroscopy. Our achievements will promote the effective use of the powder-type graphene products for further applications. |
| E-mail |
hajinlee@kbsi.re.kr |
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123rd General Meeting of the KCS