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제123회 대한화학회 학술발표회, 총회 및 기기전시회 Characteristics and Electrochemical Performance of Graphene/Carbon nanofiber/Silicon Composites as Anode Material for Binder-Free Lithium Secondary Batteries

2019년 2월 11일 15시 03분 38초
ANAL2.O-5 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
금 09시 : 16분
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/Carbon nanofiber/Silicon 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 CNFs/Silicon solution, and the mixture was sonicated for 6h to obtain a GO/CNFs/Silicon aqueous dispersion. Electrode was fabricated by flow-directed vacuum filtration of GO/CNFs/Silicon 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. The morphologies, compositions and crystal quality of the prepared Graphene/CNFs/Silicon 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 Graphene/CNFs/Silicon composites as an anode of Li secondary batteries were investigated using three-electrode cell. The galvanostatic charge–discharge cycling and cyclic voltammetry measurements were carried out at room temperature by using a battery tester.