Constructing Internal Coupling Reactions Through Iron Substitution to Facilitate Manganese‐Based Mixed‐Phosphate Cathode for Sodium‐Ion Storage

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 10, 2025

Abstract Manganese‐based mixed‐phosphate (Na 4 Mn 3 (PO ) 2 P O 7 , NMPP) is a promising high‐voltage cathode material for sodium ion batteries (SIBs). However, the sluggish kinetics of 3+ /Mn 2+ redox and dissolution problems result in poor rate capability cycle stability. Herein, manganese substituted with iron to synthesize series Na 3‐ x Fe (0≤ ≤2, NMFPP) materials. Among these, optimized 1.5 (NMFPP‐1.5) sample exhibits highest thermodynamic stability electronic conductivity via theoretical calculations. Practically, NMFPP‐1.5 not only largest gravimetric energy density 378.5 Wh kg −1 (14.4% higher than SIBs, but also least fastest Na‐ion diffusion kinetics. In situ investigations illustrate extraction/insertion as an imperfect solid‐solution reaction lattice distortions. Notably, kinetic‐controlled electrochemical‐chemical‐coupling discharge mechanism proposed understand voltage hysteresis additional plateau phenomenon caused by great difference between /Fe couples. This coupling process facilitates fast NMFPP‐1.5, guaranteeing grid‐scale storage system application. Furthermore, practical usability validated fabricating hard carbon. The full cell reaches 204.6 based on total anode mass, exhibiting excellent high

Язык: Английский

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Li and Cu double-doped P2-type sodium-ion layered oxide cathode materials with enhanced high-voltage stability

Journal of Alloys and Compounds, Год журнала: 2025, Номер unknown, С. 179425 - 179425

Опубликована: Фев. 1, 2025

Язык: Английский

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All climate and fast-charging sodium-ion pouch cell

Journal of Colloid and Interface Science, Год журнала: 2025, Номер 692, С. 137450 - 137450

Опубликована: Март 28, 2025

Язык: Английский

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Ultra-capacity and low-cost P3-type K0.5Mn0.96Fe0.04O2 cathode materials for K-ion batteries

Chemical Engineering Journal, Год журнала: 2024, Номер unknown, С. 157939 - 157939

Опубликована: Ноя. 1, 2024

Язык: Английский

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