CNT 첨가를 통해 표면 처리한 LTO의 특성향상에 관한 연구
Improved Properties of Li4Ti5O2 (LTO) by Surface Modification with Carbon Nanotube (CNT)
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초록
Among the lithium metal oxides for hybrid-capacity, Li4Ti5O12(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 Li4Ti5O12(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 ~ 10 μm. 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.
Abstract
Among the lithium metal oxides for hybrid-capacity, Li4Ti5O12(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 Li4Ti5O12(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 ~ 10 μm. 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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