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제124회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Characteristics and Electrochemical Performance of Graphene/Silicon/Carbon nanofibers Composite films as Anode Material for Binder-Free Lithium ion Secondary Batteries

2019년 8월 20일 10시 36분 03초
ANAL2.O-6 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
금 09시 : 15분
Analytical Chemistry - Oral Presentation of Young Analytical Chemists II
저자 및
Ruye Cong, Jin-Yeong Choi, Chang-Seop Lee*
Department of Chemistry, Keimyung University, Korea
We report the interfacial study of a Graphene/Silicon/Carbon nanofiber Composite material as a potentially high performance anode for rechargeable lithium ion batteries. Carbon nanofibers (CNFs) were grown via chemical vapor deposition method with an iron-copper catalysts. Acetylene as a carbon source was flowed into the quartz reactor of a tubular furnace heated to 700℃, and maintained for 30 min to synthesize CNFs. GO aqueous dispersion was added into the Silicon/CNFs solution, and the mixture was sonicated for 2h to obtain a GO/Silicon/CNFs aqueous dispersion. Electrode was fabricated by flow-directed vacuum filtration of GO/Silicon/CNFs aqueous dispersion through a filter membrane (90 mm in diameter and 0.22 μm in pore diameter) followed by air drying and peeling off from the filter. Subsequently,the composited GO/Silicon/CNFs was heated up to 550℃ at a rate of 10℃ min-1 in a quartz tube furnace with an argon flow,and maintained for 2h to form a rGO/Si/CNFs composite film. The morphologies, compositions and crystal quality of the prepared rGO/Silicon/CNFs composites were characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), transmission electron microscope (TEM), X-ray diffraction (XRD), Raman spectroscopy and X-ray photoelectron spectroscopy (XPS). The electrochemical characteristics of rGO/Silicon/CNFs composites as an anode of Lithium ion secondary batteries were investigated using two-electrode coin-type cell. The galvanostatic charge–discharge cycling and cyclic voltammetry measurements were carried out at room temperature by using a battery tester.