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에너지저장용 MCMB 표면에 합성된 Li4Ti5O12의 전기화학적 특성
최창해 ( Chang Hae Choi ),박수길 ( Soo Gil Park ) 충북대학교 건설기술연구소 2011 建設技術論文集 Vol.30 No.1
The Li4Ti5O12/MCMB composite was prepared by sol-gel process with ultrasonication. The prepared composite materials were analyzed by SEM, XRD, and XPS, and their electrochemical characteristics were investigated by cyclic voltammetry and charge-discharge characteristics in 1 M LiBF4/EC+DMC as an electrolyte. From the results, the LTO particles composited on MCMB surface had an average particle size of 100 nm and showed spinel-frame structure. Specific capacity of composited materials were measured 112 mAh/g by charging-discharging in 0.8 C-rate. When the C-rate increases 3.9C, specific capacity ratio of LTO of composite materials were measured 58%, LTO/MCMB was 27%. At the result, LTO/MCMB composite materials enhanced characteristics of high-current discharge.