Study on the Rate Performance of Porous Na2Ti3O7 for Sodium-ion Battery Anode Material

Abstract

In this paper, carbon spheres with active groups on the surface were prepared by hydrothermal method. And porous Na2Ti3O7 material was prepared by sol-gel method with the carbon spheres as template. The results of scanning electron microscopy (SEM) showed the porous structure and the pore size ranged from hundreds of nanometers to 2 micron. XRD test results showed that pure phase materials were synthesized and the grain size was 47.6 nm. The results of electrochemical performance test showed the good rate performance of this material. The charge capacity of the material were 64.4 mAhg-1 and 50.4 mAhg-1 at 5C and 10C after 150 cycles, and the capacity retention rates were 62.5% and 66.3%, respectively.