Facile synthesis of Bi₂MoO₆ nanosheets@nitrogen and sulfur codoped graphene composites for sodium-ion batteries

Abstract

Recently, sodium-ion batteries gradually become the promising alternative to lithium-ion batteries because of cost considerations. In this work, a kind of Bi2MoO6 nanosheets@N,S codoped graphene composite is designed and fabricated for sodium storage applications. Detailed characterizations are employed to investigate its morphology, structure and chemical compositions. When evaluated as an anode material for sodium-ion batteries, the as-prepared composite is able to display a specific capacity of 254 mA·h/g after 50 cycles at a current density of 0.2 A/g, and 186 mA·h/g at 1.6 A/g during the rate capability test. As a result, the further morphology and structure optimization is still required for high performance sodium-ion batteries.