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09월 04일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능
제114회 대한화학회 학술발표회, 총회 및 기기전시회 안내
Synthesis and Electrochemical Characteristics of Carbon nanofibers based on Ni and Mo Catalysts by Chemical Vapor Deposition [우수포스터상]
2014년 8월 27일 14시 19분 33초
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10월 15일 (수요일) 16:00~19:00
계명대학교 화학과, Korea
계명대학교 화학시스템공학과, Korea
This study reports on the synthesis of carbon nanofibers by chemical vapor deposition using Ni and Mo as catalysts. In order to investigate the suitability of their growth temperature and catalytic activity for the synthesis of carbon nanofibers, we prepared catalysts for the synthesis of carbon nanofibers with nickel nitrate and ammonium molybdate. We found the optimum growth temperature and concentration of each catalyst. The catalysts were sparsely and thinly spread on a quartz tube boat to grow carbon nanofibers by thermal chemical vapor deposition. The surface morphology and composition of synthesized carbon nanofibers were investigated by SEM and EDS analyses. The crystal quality of synthesized carbon nanofibers was analyzed by Raman and XRD. The chemical state of the surface was investigated by XPS. Specific surface areas of prepared metal catalysts and carbon nanofibers were measured by BET. It was verified that the characteristics of the synthesized carbon nanofibers were greatly influenced by the concentration ratio of catalysts. When the concentration ratio of Ni and Mo was 6:4 at 800 ℃ of calcinations temperature, the most uniform carbon nanofibers of 50 nm in diameter with the best crystallizability was grown. The three-electrode cell for Li secondary battery was fabricated with the CNFs grown on catalysts (Ni:Mo=6:4) as an anode material. The cell was composed of Polytetrafluoroethylen (PTFE) as a binder and Li metal used as the counter and reference electrode. The electrolyte consists of a 1M LiPF
solution in ethylene carbonate (EC): propylene carbonate (PC): ethyl methyl carbonate (EMC) with 1:1:3 volume ratio. The electrochemical characteristics of CNFs were investigated by cyclic voltammetry and galvanostatic charge-discharge. Acknowledgment : 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.2012026209).
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