Synthesis and characterization of NaxMnO2 as a cathode material for Sodium-ion rechargeable Batteries

Abstract

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Here we present the synthesis and characterization of NaxMnO2 as a cathode material for Sodium-ion batteries by changing the Sodium molar ratio in the material. The cathode material was synthesized by using solid state reaction ofMnO2 and Na2CO3 at higher temperature using different molar ratios. Then the Active material was mixed with 5% of carbon black and a paste of the compound was made by using a mixture of 01.00 mgdm3 polyvinylidene fluoride (PvdF) dissolved in 1-methyl-2-pyrrolidinone solution. Films made using this paste was used to fabricate Na ion batteries which were then tested in anoxia conditions. Electrochemical properties such as cyclic voltammetry, capacity, charge-discharge performance and battery life cycle were analyzed. The X-ray diffraction data compared with the reference showed the formation of NaMnO2 active material and the highest charging and discharging capacity was obtained for 1:0.8 molar ratio of MnO2 and Na. The cyclic voltammetry further indicated that the highest capacity was given for 1:0.8 ratio with 5% of carbon black