Improved Properties of Li4Ti5O2 (LTO) by Surface Modification with Carbon Nanotube (CNT)
CNT 첨가를 통해 표면 처리한 LTO의 특성향상에 관한 연구
박수길;김청;;
Park, Soo-Gil;Kim, Cheong;Habazaki, Hiroki;
충북대학교 공업화학과;북해도대학교;
Department of Engineering Chemistry, Chungbuk National University;Faculty of Engineering, Hokkaido university;
DOI : 10.5695/JKISE.2016.49.2.191
Among the lithium metal oxides for hybrid-capacity, $Li_4Ti_5O_{12}(LTO)$ is an emerging electrode material as zero-stain material in volume change during the with the charging and discharging processes. However, LTO has a limitation of low ionic and electronic conductivity. To enhance the ionic and electronic properties of $Li_4Ti_5O_{12}(LTO)$, we synthesized the spherical LTO/CNT composite by sol-gel process for hybrid capacitors. CNT interconnection networks between CNT-LTO particles enhanced electronic conductivity and electrochemical charging/discharging properties. All of the LTO samples was observed to show the spinel structure and spherical morphology with the diameter of $5{sim}10{mu}m$. Especially, spherical LTO/CNT composite of the CNT-3 wt% showed the enhanced capacity from 110 mAh/g to 140 mAh/g at 10 C.
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