ZnFe2O4/Graphite Composite with High Performance as Anode Material for Lithium-Ion Batteries

ZnFe2O4/graphite composite was synthesized by a thermal decomposition method using expanded graphite as matrix. The ZnFe2O4 nanoparticles with the size of 20-30 nm were embedded into the interlayers of graphite. The porous structure formed by the graphite sheets can not only alleviate the adverse effects caused by the volume change of the ZnFe2O4 during cycling, but also improve the lithium storage performance. The specific capacity of 1450 mAh g(-1) is achieved after 150 charge/discharge cycles at 0.1 A g(-1). Moreover, the composite still delivers the specific capacity of 229 mAh g(-1) at the ultrahigh current density of 10 A g(-1) after 1800 cycles, showing outstanding electrochemical performance and excellent cycling stability. The composite has great potential for use in the high-power lithium-ion batteries. [GRAPHICS] .

Automated summary

A ZnFe2O4/graphite composite with a porous structure was synthesized via thermal decomposition, showing improved lithium storage performance and cycling stability. The composite exhibited a specific capacity of 1450 mAh g(-1) after 150 charge/discharge cycles at 0.1 A g(-1), and still delivered a specific capacity of 229 mAh g(-1) after 1800 cycles at a high current density of 10 A g(-1). This composite material has great potential for use in high-power lithium-ion batteries.