Unlocking the Muti-Electron Transfer Reaction in NASICON-Type Cathode Materials

Abstract The growing concern about scarcity and large-scale applications of lithium resources has attracted efforts to realize cost-effective phosphate-based cathode materials for next-generation Na-ion batteries (NIBs). In previous work, a series (such as Na 4 Fe 3 (PO ) 2 (P O 7 ), VCr(PO , VMn(PO MnTi(PO MnZr(PO etc) with ∼120 mAh g −1 specific capacity high operating potential been proposed. However, the mass ratio total transition metal in above compounds is only ∼22 wt%, which means that one-electron transfer each shows limited (the 35.4 wt% LiFePO ). Therefore, multi-electron reaction necessary catch up or go beyond electrochemical performance . This review summarizes reported NASICON-type other materials. On basis aforementioned experimental results, we pinpoint behavior metals shed light on designing rules developing high-capacity cathodes NIBs.