Preparation and lithium storage properties of ZnFe2O4@Ti3C2Tx composites
The pursuit of high specific capacity and stability in anode materials has long been a critical goal in the development of lithium-ion batteries.In this study,a high-performance composite anode material was successfully developed by compositing the high specific capacity bimetallic oxide ZnFe2O4 with Ti3C2Tx MXenes possessing excellent dispersibility.The structural analysis confirmed the successful preparation of ZnFe2O4@Ti3C2Tx composite anode material,and ZnFe2O4 nanoparticles with a size of approximately 100 nm were uniformly dispersed on the surface of the MXenes layer.The electrochemical performance test revealed that the initial reversible specific capacity of the composite reached 641.6 mA·h·g-1,and the first coulombic efficiency was 62.4%.After 100 cycles at a current density of 0.1 A·g-1,the capacity was stabilized at 584.9 mA·h·g-1.Even under high current density conditions(1 A·g-1)for 300 cycles,the capacity remained at 508.1 mA·h·g-1.The high specific capacity of the composite anode material was primarily attributed to the ZnFe2O4 conversion reaction and alloying reaction,while the presence of MXenes layer served to disperse and alleviate expansion stress,which collectively enhanced the overall performance of the composite.The specific capacity of the composite anode material increased with the increase in ZnFe2O4 content,but there was a decline in cyclic stability.
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