Zn doping induced the enhancement of electrochemical performance for CoTiO3 anode material

As a research hotspot in recent years, Ti-based anode materials for lithium ion batteries (LIBs) have advantages including long cycle life and excellent cyclic stability. However, its application is further limited by its poor conductivity and low reversible capacity. Herein, a series of porous hexagonal prism Zn-doped CoTiO3 have been designed and prepared by simple co-precipitation method followed by calcination. The influences of Zn doping concentration on the microstructure and electrochemical performance are further explored. The results indicate that Zn doping has little effect on the microstructure of CoTiO3 and can elevate capacity, cyclic stability, and rate capability. When Zn doping concentration is set as 0.1, the sample Co0.9Zn0.1TiO3 gives the best electrochemical performance. The reversible capacity can be maintained at 430.6 mAh g(-1) at a current rate of 0.2 C after 280 cycles. This work can pave an effective strategy for improving the electrochemical performance of other Ti-based anode materials.

Automated summary

This study focuses on the preparation of porous hexagonal prism Zn-doped CoTiO3 as anode material for LIBs. The effects of Zn doping concentration on microstructure and electrochemical performance are investigated. The results show that Zn doping has little influence on microstructure but can enhance capacity, cyclic stability, and rate capability. The sample Co0.9Zn0.1TiO3 exhibits the best electrochemical performance with a reversible capacity of 430.6 mAh g(-1) after 280 cycles at 0.2 C. This work provides an effective strategy for improving the electrochemical performance of other Ti-based anode materials.