Research Information System
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS, vol.329, 2026 (SCI-Expanded, Scopus)
Sodium-ion batteries (SIBs) have emerged as promising candidates for grid-scale and stationary energy storage, driven by the global need for sustainable and cost-effective alternatives to lithium-ion technologies. Among polyanionic cathode materials, Na3V2(PO4)2F3 (NVPF) offers high operating voltage, robust structural stability, and multi-electron redox activity. In this work, we report the rapid microwave-assisted synthesis of phase-pure NVPF at only 200 degrees C for 30 min, followed by ex-situ sucrose-derived carbon coating to produce NVPF/C. Comprehensive characterization confirms excellent crystallinity, uniform carbon distribution, and enhanced electrochemical kinetics in the coated material. Compared to pristine NVPF, the NVPF/C composite demonstrates significantly improved Na+ diffusion, reduced charge-transfer resistance, higher discharge capacity (approximate to 124 mAh g-1 at 0.1C), and excellent cycling stability (95% retention after 100 cycles at 1C). These results underscore the synergistic effects of microwave-assisted synthesis and carbon coating in achieving high-performance cathodes for next-generation SIBs.