Abstract

A novel cathode material has been synthesized via ball-milling of sodium cobalt phosphate (α-NaCoPO4) with two different carbon structures such as graphite and graphene for Sodium-ion battery. The orthorhombic crystal structure is retained for both composites α-NaCoPO4/graphite and α-NaCoPO4/graphene without any change even after ball-milling. The flake like morphology and distribution of graphene sheets are recognized from scanning electron microscopy images. The crystal structure of α-NaCoPO4 and nature of carbon in the ball-milled composites is determined through transmission electron microscopy. The initial discharge capacities of 41 and 92 mAhg−1 are noticed for α-NaCoPO4/graphite and α-NaCoPO4/graphene composites respectively, which dictate that the α-NaCoPO4/graphene can be promising cathode for sodium-ion battery.

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