Graphene nanosheets loaded with Pt nanoparticles with enhanced electrochemical performance for sodium–oxygen batteries

Abstract

Graphene nanosheets loaded with highly dispersed platinum nanoparticles (Pt@GNSs) are prepared by a simple and effective hydrothermal method. The Pt@GNS as an air cathode material exhibits a very high initial discharge capacity of 7574 mA h⁻¹ g⁻¹ at a current density of 0.1 mA cm⁻² and delivers a stable cycling performance. The electrocatalytic characteristics of Pt on the Na–O₂ cell have been investigated for the first time.