Electrochemical studies of non-aqueous Na–O2 cells employing Ag-RGO as the bifunctional catalyst

Abstract

Non-aqueous Na–O₂ cells are constructed with Ag-RGO as a bifunctional catalyst. The 10^th cycle discharge capacity is 566 mA h g⁻¹ at 0.1 mA cm⁻² with coulombic efficiency greater than 80%. XRD, EDAX and XPS studies of the oxygen electrode suggest that NaO₂, Na₂O₂ and Na₂O are the discharged products.