The Research of Lithium Ion Modified Zirconia/Graphite Composites

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

Abstract： The structure of ZrO2 is stable, and the stability is good during charge and discharge of the battery, but the performance of conducting Li ions and conducting electricity is poor. In this paper, ZrO2 was combined with graphite and LiOH to prepare Li+ modified ZrO2/G composite anode material, which improved its Li+ conductivity and conductivity. The materials were tested by XRD, SEM and electrochemical tests. The results show that the specific capacity of ZrO2/G composites reaches 270mAh/g at 33mA/g current density, and the specific capacity of Li+ modified ZrO2/G composite anode materials after LiOH treatment increases from 270mAh/g to At 350mAh/g, the rate performance is also improved. Graphite material improves the conductivity of ZrO2 and hinders the growth of crystal grains. The modification of LiOH increases the volume of the unit cell of the composite, and the grain size becomes smaller, which increases the lithium ion transport channel and shortens the lithium ion diffusion path.

Keywords： Lithium ion battery anode material Zirconia graphite