119th General Meeting of the KCS

Type Oral Presentation
Area Oral Presentation of Young Analytical Chemists Ⅱ
Room No. 303호
Time FRI 09:30-:
Code ANAL2.O-12
Subject Synthesis and characteristics of reduced graphene oxide/mesoporous silica composites as anode materials for lithium secondary batteries
Authors 손빛나, 현유라, 배재영, 박희구1, 이창섭*
계명대학교 화학과, Korea
1계명대학교 화학시스템공학과, Korea
Abstract The reduced graphene oxide/mesoporous silica composites (rGO/m-S) as a high performance anode for lithium secondary batteries have been synthesized. The rGO/m-S composites with different mass ratios are dissolved in distilled water and coated on a Nickel foam via a simple dip-coating method. Nickel foam is used as a current collector and template for the electrode fabrication. The physicochemical characteristics of the rGO/m-S composites were analyzed by scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), Raman spectroscopy, N2-sorption and X-ray photoelectron spectroscopy (XPS). A three-electrode cell, as a half cell, was assembled by using rGO/m-S composites as the anode active materials of lithium secondary batteries in a glove box filled with Ar gas. The prepared rGO/m-S materials were used as the working electrode. Lithium was used as the counter and reference electrodes. A glass fiber separator was used as the separator membrane. 1 M LiClO4 was used as the electrolyte and dissolved in a 1:1 volume mixture of ethylene carbonate:propylene carbonate in a 1:1 volume ratio. The galvanostatic charge–discharge cycling and cyclic voltammetry measurements were carried out at room temperature by using a battery tester. Li secondary batteries prepared with mixed rGO/m-S composite showed better electrochemical performance than the case of multilayered rGO/m-S composite. Acknowledgements This research was financially supported by the Ministry of Education, Science Technology (MEST) and National Research Foundation of Korea (NRF) through the Human Resource Training Project for Regional Innovation (No. 2015035858).
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