Spray-Drying Synthesis of Pure Na2CoPO4F as Cathode Material for Sodium Ion Batteries

Abstract

The expected theoretical energy density of Na2CoPO4F as a cathode material for sodium ion batteries surpasses 500 Wh kg−1 even if considering only one-electron utilized per formula unit. It is therefore one of the highest energy density cathode materials for sodium-ion batteries. In this work, pure phase Na2CoPO4F/C nanocomposite was successfully synthesized by a spray-drying and high temperature sintering method. The Na2CoPO4F/C nanocomposite, when tested vs. sodium metal, delivered a discharge capacity of 107 mAh g−1 with a voltage plateau at 4.3 V. © 2015 The Electrochemical Society. [DOI: 10.1149/2.0061506eel] All rights reserved.