Micro-nano Na3V2(PO4)3/C derived from metal-organic frameworks for high performance sodium ion batteries

Na 3 V 2 (PO 4 ) 3 has been widely studied due to its stable three-dimensional transmission channel structure as a cathode electrode of sodium ion batteries , but its micro particle size and low intrinsic electronic conductivity limit its further development. Therefore, hierarchical porous micro-nano NVP/C materials were successfully prepared using a metal-organic frameworks (MOFs) precursor. Because of the unique hierarchical porous micro-nano structure, 3D highly conductive network between surface and particles, and high specific surface area, M-NVP/C exhibits outstanding rate capability (95.0 mAh g −1 at a current density of 10 C) and extraordinary stable cycle life (the capacity decays from 111.2 mAh g −1 to 108.8 mAh g −1 after 500 cycles at 1 C, with a capacity retention rate of 97.8 %). This method provides a promising pathway for the application of MOFs in battery materials and promotes the development of SIBs in large-scale energy storage systems.