121st General Meeting of the KCS

Type Poster Presentation
Area Electrochemistry
Room No. Event Hall
Time 4월 20일 (금요일) 11:00~12:30
Code ELEC.P-604
Subject Sea urchin-like Li4Ti5O12 nanostructure with high energy density and improved ionic transport for lithium storage
Authors Min-Cheol Kim, Sang-Hyun Moon1, Sojeong Choi1, Eun-Soo Kim1, Ji-Eun Lee1, Yeon-Kyung Shin1, Kyung-Won Park1,*
Department of Chemical Eng., Soongsil University, Korea
1Department of Chemical Engineering, Soongsil University, Korea
Abstract Li4Ti5O12 (LTO) with a spinel structure is attractive as a promising anode for lithium-ion batteries due to a high charge/discharge voltage versus Li/Li+ and almost no volumetric expansion with improved cycle performance. In this study, a sea urchin-like nanostructured LTO (F-LTO) was prepared in the presence of F-127 as a surfactant. The morphology and structure of the samples were confirmed using field emission scanning electron microscopy (FE-SEM) and X-ray diffraction (XRD) method. To investigate the electrochemical properties of the samples, charging/discharging analysis was performed for 1,000 cycles at a high current density. F-LTO showed an improved capacity retention rate and a high average capacity compared to the LTO sample prepared in the absence of F-127. It was found that, when using the high-rate performance analysis at different charging/discharging current densities, the intercalation of Li+ ion to an electrode might be a crucial factor to reduce capacity and energy density. Due to its porous nanostructure with high specific area, F-LTO showed low polarization and improved kinetic properties, resulting in enhanced LIB performance including high energy density and cycling properties.
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