Ultrafast synthesis of Na3V2(PO4)3 cathode for high performance sodium-ion batteries

Na3V2(PO4)3 (NVP) is regarded as alternative cathode material for sodium-ion batteries (SIBs) due to its potential high-rate performance and pronounced long-term cycle stability. However, electronic conductivity and tap density are difficlut to be balanced. Herein, we report that high-temperature shock (HTS) can prepare “single crystalline like” NVP which combines high-rate capability with high tap density together into one with the assistance of carbon framework and large particle. Thus, high reversible capacity of 110 mAh/g at 0.1 C with 89.9% capacity retention after 1600 cycles at 1 C and specific capacity of 83.5 mAh/g at 50 C rate has been exhibited. This study provides a novel strategy to guide the production of high tap density, and rate performance polyanionic cathode materials.