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Advancements and challenges in modification strategies for Na4Fe3(PO4)2(P2O7) Cathode: toward high-performance sodium-ion batteries
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DOI：10.1007/s11581-026-06978-2.png)
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Abstract
En 中文
Na4Fe3(PO4)(2)(P2O7) (NFPP), as a polyanionic cathode material, has garnered significant attention due to its high theoretical capacity, low volume variation, high operating voltage, and environmental friendliness. Simultaneously, challenges such as the low intrinsic electronic conductivity, impurity phase formation, and sluggish sodium-ion diffusion kinetics inherent to NFPP have driven extensive research into material modification and structural design. While these research efforts have attracted considerable interest over the past decade, a timely and systematic summary and analysis of the progress remain lacking. This review comprehensively addresses the challenges confronting NFPP materials and the corresponding advancements in modification strategies. Firstly, the classical approach of elemental doping, encompassing both anion and cation doping, is introduced. Subsequently, significant progress in carbon coating and structural design strategies is detailed. Finally, based on the practical application requirements for NFPP materials, the persisting challenges are thoroughly analyzed. Feasible future research directions are outlined to provide researchers with relevant insights and references.
Keywords:
Sodium-ion battery
Cathode
NFPP
Modification strategy
Doping
Coating
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