Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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Improved Properties of Li4Ti5O2 (LTO) by Surface Modification with Carbon Nanotube (CNT)

CNT 첨가를 통해 표면 처리한 LTO의 특성향상에 관한 연구

  • Park, Soo-Gil (Department of Engineering Chemistry, Chungbuk National University) ;
  • Kim, Cheong (Department of Engineering Chemistry, Chungbuk National University) ;
  • Habazaki, Hiroki (Faculty of Engineering, Hokkaido university)
  • 박수길 (충북대학교 공업화학과) ;
  • 김청 (충북대학교 공업화학과) ;
  • Received : 2016.03.11
  • Accepted : 2016.03.25
  • Published : 2016.04.30
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Abstract

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.

Keywords

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