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제116회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Synthesis of silicon-coated carbon nanofibers on electroplated Co-Ni /C-fiber textiles for anode material of Li ion batteries

2015년 8월 27일 14시 56분 07초
ANAL1.O-26 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
목 10시 : 40분
분석화학 - Oral Presentation of Young Analytical Chemists I
저자 및
장건호, 이상훈, 이창섭*
계명대학교 화학과, Korea
In this study, carbon nanofibers(CNFs) were synthesized by thermal chemical vapor deposition(CVD) to Co-Ni electroplated on C-fiber textiles. The CNFs were coated with a SiO2 layer by hydrolysis of Tetraethyl orthosilicate(TEOS) and Si@CNFs composite were synthesized by reduction of SiO2@CNFs composite. SiO2@CNFs and Si@CNFs were applied to the anode material of Li ion batteries. C-fiber textiles were oxidized with nitric acid before electroplating with Co-Ni catalysts. The oxidation process created the hydroxyl group on the C-fiber textiles, and the hydroxyl group was used as an active site for the electroplating of catalysts. After being electroplated, ethylene as a carbon source was flowed into a quartz tubular furnace heated to 700℃, and maintained for 1 h to synthesize CNFs. The CNFs were oxidized by nitric acid before being coated with silica via hydrolysis of TEOS. Coated silica layer on CNFs was reduced by inflow of H2 gas at 700℃. The characteristics of CNFs were analyzed by SEM, EDS, XPS and Raman. The SiO2@CNFs and Si@CNFs were characterized using TEM, EDS and XPS. The as-synthesized CNFs, SiO2@CNFs and Si@CNFs were directly employed as anode materials without any binder. The electrochemical characteristics of CNFs, SiO2@CNFs and Si@CNFs as anodes of Li ion batteries were investigated using coin cell.