A cathode material(NaNi0.5Mn0.5O2)for sodium-ion batteries was synthesized by adopting solid-state,co-precipitation and sol-gel methods,and the effects of synthesis methods on crystal structure,microscopic morphology and electrochemical performance of the cathode material were also explored.The results show that the materials synthesized respectively by those three methods all have O3-type structure,but exhibit different morphology.The cathode material synthesized by solid-state method has a special layered structure,which is conducive to sodium ion de-intercalation.The cathode materials synthesized by solid-state,co-precipitation and sol-gel methods,respectively,deliver an initial specific discharge capacity of 96.1 mAh/g,92.8 mAh/g and 92.3 mAh/g at 0.1C,with retention rate of 64.3％,46.5％and 36.5％respectively after 100 cycles at 0.5C.It is concluded that the solid-state synthesis is an appropriate method.
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