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제120회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Characteristics and electrochemical performance of silica coated carbon nanocoils composite as an anode material for lithium secondary batteries

등록일
2017년 8월 22일 14시 11분 11초
접수번호
3019
발표코드
ANAL1.O-22 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
목 09시 : 58분
발표형식
구두발표
발표분야
Analytical Chemistry - Oral Presentation of Young Analytical Chemists I
저자 및
공동저자
EunJeong Hwang, Yura Hyun1, Heai-Ku Park2, Chang-Seop LEE*
Department of Chemistry, Keimyung University, Korea
1Department of Pharmaceutical Engineering, International University of Korea, Korea
2Department of Chemical System Engineering, Keimyung University, Korea
We have performed a study of a silica/carbon nanocoils (SiO2-CNC) nanocomposite as a potentially high performance anode for rechargeable lithium secondary batteries. Carbon nanocoils were grown via chemical vapor deposition (CVD) method. Acetylene (C2H2) and Sulfur hexafluoride (SF6) were flowed into the quartz reactor of a tubular furnace heated to 550 ℃ at 100 torr and maintained for 60 min to synthesize CNCs. CNCs were then put into the Tetraethyl orthosilicate (TEOS) to synthesize SiO2-CNCs composite. The electrochemical characteristics of SiO2-CNCs composites as an anode of Li secondary batteries were investigated using three-electrode cell. The SiO2-CNCs composites loaded on Ni foam were directly employed as an working electrode without binder. As the counter and reference electrode used lithium foil. 1M LiClO4 was employed as electrolyte and dissolved in a mixture of propylene carbonate (PC): ethylene carbonate (EC) in a 1:1 volume ratio. Glass fiber separator was used as the separator membrane. The galvanostatic charge–discharge cycling and cyclic voltammetry measurements were carried out at room temperature by using a battery tester. The morphologies, compositions and crystal quality of the prepared SiO2-CNCs composites were characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), energy X-ray diffraction (XRD), dispersive spectroscopy (EDS), Raman spectroscopy and X-ray photoelectron spectroscopy (XPS). As a result electrochemical performance of SiO2-CNC was batter than existing carbon nanofibers and carbon nanocoils.

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