Synthesized of Li4Ti5O12 Materials via Sol-Gel Method to Lithium Ion Battery Anodes

Abstract

Li4Ti5O12 (LTO) anode is one of ion lithium battery important components. LTO anode has been synthesized using solid state reaction method that was calcined at 900°C and produced relatively large particle sizes and low electrochemical performance. The Low electrochemical performance can be improved by replacing the anode synthesis method using sol-gel method. This research used the sol-gel method to synthesize LTO anodes with calcination temperature at 900°C and holding time at 2hr with the aim of obtaining homogenous particle size distribution with small particle size average and high discharging capacity. X-ray diffraction (XRD) characterization was carried out to find the crystalline phase formed while field emission-scanning electron microscopy (FE-SEM) was carried out to find the morphology and particle sizes distribution. Electrochemical performance of LTO anodes was measured from cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and charge-discharge (CD). The LTO-spinel phase was identified as the primary phase and TiO2-rutile phase as the impurity phase. The particle size distribution is 0.24μm and the sample consisted of particles that agglomerate without no pores. This anode has high electrochemical performance especially discharging capacity of 302 mAh/gr at 1C.