Jae Hyun Kim
Daegu Gyeongbuk Institute of Science & Technology, Republic of Korea
Title: Li4Ti5O12 based material as high performance electrode for lithium ion batteries and hybrid super- capacitor
Biography
Biography: Jae Hyun Kim
Abstract
Spinel Li4Ti5O12 (LTO) has been considered one of excellent materials to improve and reinforce the weak points of conventional carbon anode material. It has advantages of negligible structural change during the charge/discharge process, good Li+ diffusion channels due to 3-dimensional structure, and no formation of solid electrolyte interphase (SEI). However, LTO has low conductivity. In order to overcome this drawback, doping with anions and cations, coating with metal and oxide, and making composite with other materials. In doping method, most of studies have been focused on single doping material. In this study, we tried co-doping of two different elements. The combination of materials was over 300 pairs. We found the best doping combination. To improve the cycle performance even more, we coated ZnO, Al2O3, Al-doped ZnO of several nm on the surface of LTO electrode using atomic layer deposition. We also introduce the application of LTO to hybrid super capacitor. The effect of various LTOs that was fabricated on different process conditions on electrochemical performance of hybrid super capacitor will be discussed.
