Zwitterionic polymer-derived nitrogen and sulfur co-doped carbon-coated Na3V2(PO4)2F3 as a cathode material for sodium ion battery energy storage

A zwitterionic polymer is used as a new nitrogen and sulfur source to synthesize N, S co-doped carbon-coated Na 3 V 2 (PO 4 ) 2 F 3 (NVPF-NSC) and was found to exhibit high specific discharge capacity and excellent cycle performance.