121st General Meeting of the KCS

Type Poster Presentation
Area Analytical Chemistry
Room No. Event Hall
Time 4월 19일 (목요일) 11:00~12:30
Code ANAL.P-224
Subject Synthesis and Electrochemical Properties of Ru/PC/SiO2/CNFs Composites for Anode Materials of Li Secondary Batteries
Authors EunJeong Hwang, Yura Hyun1, Jong Seok Han, RUYE CONG, 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
Abstract Carbon nanofibers (CNFs) were grown by chemical vapor deposition method on C-fiber textiles that Ni and Cu catalysts were deposited via electrophoretic deposition. Carbon nanofibers were oxidized by nitric acid to create hydroxyl group and then coated with silica layer via hydrolysis of TEOS (Tetraethyl orthosilicate). Pyrolytic carbon was coated on the SiO2/CNFs composite by flowing ethylene gas at 900℃, and then Ru was dip-coated to prepare Ru/PC/SiO2/CNFs composite. The morphologies, compositions, and crystal qualities of CNFs and the various carbon nanofiber composites were characterized by SEM, TEM, EDS, XPS, and Raman spectroscopy. The electrochemical properties and the capacitance of the carbon nanofibers and its composites as anode materials of Li secondary batteries were investigated by galvanostatic charge-discharge and cyclic voltammetry. The galvanostatic charge/discharge results of the CNFs, SiO2/CNFs, PC/SiO2/CNFs, and Ru/PC/SiO2/CNFs, composites exhibited maximum capacities of 809 mAh/g, 1289 mAh/g, 2469 mAh/g, and 2451 mAh/g, respectively.
E-mail taejang1513@naver.com