Abstract: Sodium-ion batteries have emerged as an important complementary system to lithium-ion batteries due to their resource availability and cost advantages. Focusing on the structural characteristics and performance optimization strategies of sodium superionic conductor (NASICON)-type cathode materials, the recent progress in modification approaches for NASICON material system is systematically reviewed. The comprehensive discussion encompasses single-element doping, multi-element doping, surface coating, high-entropy doping, and sodium-enriched doping strategies. These methodologies aim to address critical challenges including poor intrinsic conductivity, high toxicity of vanadium element, and low theoretical capacity inherent in NASICON materials. Thisreview provides fundamental theoretical insights and technical pathways for developing high-performance cathode materials in sodium-ion battery systems.

Key words: sodium-ion battery, NASICON, cathode material, electrochemical performance, high-entropy doping, Na-rich doping, coating