Mirkhani, Seyyed Alireza Iqbal, Aamir Kwon, Taehoon Chae, Ari Kim, Daesin Kim, Hyerim Kim, Seon Joon Kim, Myung-Ki Koo, Chong Min 2024-01-19T15:01:46Z 2024-01-19T15:01:46Z 2022-01-10 2021-04-07 1944-8244 https://pubs.kist.re.kr/handle/201004/117142 Two-dimensional graphene is of great interest for electromagnetic interference (EMI) shielding owing to its inherent electrical conductivity, lightweight, and excellent mechanical flexibility even at minor thicknesses. However, the complex synthesis and quality-control difficulties limit its application. In this study, we demonstrate that electrochemically exfoliated graphene (EEG) with post-reduction treatment is a promising candidate for lightweight EMI shielding materials. A facile electrochemical exfoliation approach produces a high-quality multilayer graphene with a high electrical conductivity of similar to 600 S cm(-1), owing to its low degree of oxidation. The reduction of EEG by three different methods, including chemical, thermal, and microwave treatments, causes the removal of surface functional groups as well as significant changes in the microstructure of the final films. The reduced graphene films by microwaves, which are driven by the improved electrical conductivity and large volume expansion, exhibit an EMI shielding effectiveness of 108 dB at a thickness of 125 mu m, one of the largest EMI shielding values ever reported for graphene at comparable thicknesses. English American Chemical Society HIGH-ELECTRICAL-CONDUCTIVITY THERMAL-CONDUCTIVITY RAMAN-SPECTROSCOPY HIGH-QUALITY OXIDE-FILMS GRAPHITE ABSORPTION SHEETS ROUTE PAPER Reduction of Electrochemically Exfoliated Graphene Films for High-Performance Electromagnetic Interference Shielding Article 10.1021/acsami.0c22920 1 ACS Applied Materials & Interfaces, v.13, no.13, pp.15827 - 15836 ACS Applied Materials & Interfaces 13 13 15827 15836 scie scopus 000639014900099 2-s2.0-85104047842 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Science & Technology - Other Topics Materials Science Article HIGH-ELECTRICAL-CONDUCTIVITY THERMAL-CONDUCTIVITY RAMAN-SPECTROSCOPY HIGH-QUALITY OXIDE-FILMS GRAPHITE ABSORPTION SHEETS ROUTE PAPER electrochemical exfoliation graphene reduction EMI shielding multiple reflections