The research of Li2ZrO3-graphene composites

• 1、College of Chemistry and Chemical Engineering, Hunan University, 410082

Abstract：In this paper, lithium zirconate as the conductor of lithium ions and graphene as the conductor of electrons were combined to prepare a novel anode material for high-performance lithium ion batteries. Two different zirconium sources, zirconium dioxide and tetrabutyl zirconate, were used to prepare LZOC-1 and LZOC-2 anode materials via a simple high temperature solid phase reaction. The prepared anode electrode materials were characterized by XRD, SEM and constant current charge and discharge tests. Results shows that LZOC-1 samples have a high specific capacity at a current density of 0.1 A/g, which is approximately 290 mAh/g. While LZOC-2 samples have a higher first coulombic efficiency of 67%. The initial capacity of the LZOC-2 sample was 237 mAh/g at a current density of 0.3 A/g, leaving a capacity of 216 mAh/g even after 1000 cycles, and the retention rate reached 91%. The LZOC-2 sample has good cycle stability and is an ideal anode material for lithium ion batteries.

Keywords： Lithium ion battery Anode material Lithium zirconate Graphene High temperature solid phase reaction