The Controllable Synthesis Of ZnCo₂O₄ Nanosheets And Prepare Lithium/Sodium-ion Batteries

In this paper,we report the simple hydrothermal method for the synthesis of hierarchical structure ZnCo₂O₄ microflowers that assembled by nanosheets with mesopores.We used the ZnCo₂O₄ microflowers material as the anode materials of Lithium/Sodium-ion battery and test their performance.From the results analysis,the average size of 3?m microflower constructed with 90nm thick nanosheets that distributed on 8nm mesopores.This stable mesoporous structure can make the ion diffusion fast and provide a high surface area to contact with the electrolyte,which can accommodate the volume change.This ZnCo₂O₄microflowers as the anode materials of the Lithium-ion battery shows an excellent electrochemical performance.When evaluated as anode material in Lithium-ion battery,it can deliver a capacity of 935mA h g^-1 at 100mA g^-1 after 70 cycles and the capacity retention ratio up to 95%,also shows a high first discharge capacity of 781mA h g^-1 and a good capacity of553mA h g^-1 at 500mA g^-1 after 150 cycles.Compared with the other ZnCo₂O₄ material,we can find the microflowers with the performance including the high charge/discharge capacity,rate capability and cycle stability when they are used as electrode material.According to the test,we find the ZnCo₂O₄ material as the anode material of sodium ion battery has a lot of defects which is not suitable for electrode material.The results of this experiment may provide valuable help for the next generation of high performance rechargeable battery.