119th General Meeting of the KCS

Type Oral Presentation
Area Oral Presentation of Young Analytical Chemists Ⅱ
Room No. 303호
Time FRI 09:40-:
Code ANAL2.O-17
Subject Characteristics and electrochemical performance of silica coated carbon nanocoils composite as an anode material for lithium secondary batteries
Authors 황은정, 김수연, 김성훈1, 박영호2, 박희구3, 이창섭*
계명대학교 화학과, Korea
1신라대학교 에너지응용화학과, Korea
2한국국제대학교 제약공학과, Korea
3계명대학교 화학시스템공학과, Korea
Abstract 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. 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)
E-mail taejang1513@naver.com