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

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 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

Language: 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, Journal Year: 2025, Volume and Issue: unknown, P. 179425 - 179425

Published: Feb. 1, 2025

Language: Английский

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All climate and fast-charging sodium-ion pouch cell

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 692, P. 137450 - 137450

Published: March 28, 2025

Language: 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, Journal Year: 2024, Volume and Issue: unknown, P. 157939 - 157939

Published: Nov. 1, 2024

Language: Английский

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