New Electrochemical Systems for Sodium-Ion Batteries

Abstract

Abstract: Two new electrochemical systems have been developed for sodium-ion batteries with a positive electrode based on manganese-doped sodium iron phosphate (NaFe0.5Mn0.5PO4) and a negative electrode based on a CoGe2P0.1 nanostructure, as well as with a positive electrode based on iron-doped sodium vanadophosphate (Na3V1.9Fe0.1(PO4)3) and a negative electrode based on a CoGe2P0.1 nanostructure. The results of cycling of battery models showed that the energy density of the NaFe0.5Mn0.5PO4/CoGe2P0.1 and Na3V1.9Fe0.1(PO4)3/CoGe2P0.1 electrochemical systems is ~165 and 167 W h/kg, respectively.