A simple way for preparing CoFe2O4-based composite with improved lithium storage

In order to achieve the application of emerging electrode materials in lithium-ion batteries, developing simple preparation process is as important as improving their performance. However, most of the emerging anode materials lack simple preparation methods in spite of high performance. Herein, we demonstrate a simple way to prepare high-performance CoFe2O4-based composite anodes for lithium-ion batteries. This composite (CoFe2O4/ CoxFey@C) consists of porous clustered CoFe2O4/CoxFey hybrid nanoparticles coated by a thin carbon. The results indicate that the synergistic effects of the CoxFey nanoparticles, carbon coating , porous structure contribute to good electrochemical kinetics and superior cycling durability of the CoFe2O4/CoxFey@C composite. Consequently, it exhibits outstanding lithium storage performance, revealing 684.6 mA h g(-1) at 200 mA g(-1) after 250 cycles as well as 518.7 mA h g(-1) at 1000 mA g(-1) after 800 cycles. Moreover, the CoFe2O4/CoxFey@C composite has longer cyclic lifespan than the most of reported CoFe2O4/C composites besides the simple preparation process and adequate capacities, therefore showing significant advantages in application in lithium-ion battery anodes.

Automated summary

In order to apply emerging electrode materials in lithium-ion batteries, it is crucial to develop a simple preparation process alongside improving their performance. This study demonstrates a simple method to prepare high-performance CoFe2O4-based composite anodes, which exhibit outstanding lithium storage performance and cyclic lifespan.