Na₃V₂(PO₄)₃ Cathode Materials: Progress in Structural Optimization and Performance Enhancement

NASICON-structured Na₃V₂(PO₄)₃ (NVP) cathodes constitute a critical material platform for sodium-ion batteries through inherent three-dimensional frameworks and multi-electron redox accessibility. This review systematically examines crystallographic foundations governing electrochemical performance, revealing site-selective extraction mechanisms and migration energy barriers that fundamentally limit capacity utilization. Electronic conductivity constraints necessitate sophisticated enhancement strategies encompassing multi-dimensional carbon architectures, heteroatom doping methodologies, and strategic transition metal substitution. Contemporary advances in computational voltage mapping and multi-element doping schemes demonstrate successful activation of high-voltage redox couples while maintaining framework integrity. Integration of theoretical screening protocols with experimental validation establishes rational design principles for earth-abundant compositions, addressing commercial viability requirements.