Performance of LTO/rGO Composite Anode in Lithium Ion Battery

Abstract

Li₄Ti₅O₁₂ (LTO) has attracted extensive research interest as an anode material owing to its excellent safety and cycling stability. The relatively high operating potential of LTO (1.55 V vs. Li/Li⁺) prevents dendrite formation, while its being above the potential at which most electrolytes and solvents are reduced leads to the formation of a thinner solid–electrolyte interphase (SEI) layer on its surface. However, the intrinsically low electronic conductivity of LTO remains the primary factor limiting its capacity. In this study, reduced graphene oxide (rGO) was synthesized and incorporated into LTO at approximately 10 wt.%, and the electrochemical performance of the resulting LTO/rGO composite anode was evaluated in lithium-ion batteries. The results revealed that rGO incorporation enhanced the discharge capacity of the LTO anode by at least 30%, while maintaining a Coulombic efficiency of nearly 100% over 100 cycles and achieving a capacity retention rate of no less than 96%.