Study on sucrose modification of anode material Li4Ti5O12 for Lithium-ion batteries

Abstract

Lithium-ion batteries (LIBs) technology have been widely utilized as these batteries show great promise as power sources in our life. However, the commercial anode is mainly carbon materials which facing safety issues owing to a low Li-intercalation potential. The spinel Li4Ti5O12 (LTO) has attracted special attention for its structural changes lightly, better safety performance and stable cycle reversibility. Herein, we increased the electronic conductivity of LTO via improving the transport properties of the material with sucrose as carbon sources. The modified LTO with sucrose were successfully fabricated and found to exhibit better electronic conductivity. XRD results showed that all the major diffractions from the spinel structure of LTO can be found in the modified LTO such as (1 1 1), (3 1 1), (4 0 0) but there are no observations of the carbon diffraction peaks. Electrochemical impedance spectroscopy (EIS) data shows modified LTO resistance was nearly one third of the standard LTO value, which indicates modifying LTO with sucrose is a promising approach to prepare the high performance LTO anode. Keywords: Lithium-ion batteries, Li4Ti5O12, Electronic conductivity, Sucrose