Superior electrochemical properties of Na3V2(PO4)2F3/rGO composite cathode for high-performance sodium-ion batteries

Na3V2(PO4)(2)F-3 has garnered attention as a promising cathode material, primarily due to its substantial theoretical capacity, high operating voltage, and high structural stability. Nonetheless, this material suffers from the low intrinsic electronic conductivity, resulting in a considerable impact on the material properties. To address this challenge, we employ a straightforward hydro-solvothermal reduction process to fabricate Na3V2(PO4)(2)F-3/reduced graphene oxide composites featuring a three-dimensional conductive structure. Through an integrated approach involving material synthesis, structural characterization, and electrochemical analysis, we elucidate the synergistic effects between Na3V2(PO4)2F3 and reduced graphene oxide in facilitating sodium ion storage and transport. The Na3V2(PO4)(2)F-3/reduced graphene oxide cathode in a Na ion cell exhibits reversible capacities of 127 mAh.g(-1) at 0.1C and 74 mAh.g(-1) at 10C with a 99% retention after 100 cycles at 25 degree celsius. Excellent capacity, reversibility, structure stability, and improved ionic diffusivity make novel composite material an advanced cathode material for sodium-ion batteries, contributing to the development of cost-effective and high-performance energy storage solutions for a sustainable future.