Rapid Synthesis of Honeycomb-Structured FeP2@NHC for High-Rate and Durable Lithium Storage

Energies, Journal Year: 2025, Volume and Issue: 18(6), P. 1358 - 1358

Published: March 10, 2025

The concurrent preservation of structural integrity and improvement electrical conductivity in FeP2 anodes presents a persistent challenge. Herein, nanoparticles embedded within 3D N-doped honeycomb-like carbon framework composite (FeP2@NHC) are synthesized through phosphorization process with Fe3C@NHC as precursor. situ incorporation into the matrix effectively restrains aggregation, pulverization, stripping material during cycling, significantly enhances reaction kinetics stability, achieving superior electrochemical performance. Specifically, FeP2@NHC electrodes demonstrate remarkable reversible capacity (1433.9 mA h g−1 at 0.1 A g−1), excellent rate-capability (399.9 10 ultra-long cycle life (631.5 after 1000 cycles 2 g−1). Moreover, XRD analysis reveals that iron-rich Fe3C Fe3O4 precursors can react NaH2PO2 to form FeP, respectively. This study offers rational practical strategy for designing other phosphorus-rich metal phosphide anode materials.

Language: Английский

Experimental and Theoretical Insights on Interface Engineered FeS/rGO as Anode for Fast‐Charging Lithium‐ and Sodium‐Ion Batteries

Small, Journal Year: 2025, Volume and Issue: unknown

Published: March 18, 2025

Abstract Interface engineering facilitates the development of stable energy storage devices that can endure severe changes encountered during operation. In context fast‐charging anodes for lithium‐ and sodium‐ion batteries (LIBs SIBs), interface needs to promote charge/ion transfer processes, enhance Li‐/Na‐ion capacity, ensure good reversibility in order function efficiently at high rates. Herein, a simple synthetic strategy is reported design interfaces between transition metal sulfides carbonaceous supports generate high‐performance anodes. FeS/rGO nanostructures are synthesized via solid‐state annealing method by employing FeOOH/rGO, metastable precursor, which annealed 600 °C presence H₂S gas. FeS rGO significantly improved electrochemical performance, particularly demonstrated capacities rates (625 mAh g⁻¹ 5 A LIBs 708 10 SIBs). The high‐rate charge primarily governed capacitive processes. Density functional theory (DFT) calculations attributed enhanced performance anode lower diffusion barrier Li‐ Na‐ion along with built‐in electric field heterointerface.

Language: Английский

Fe1-xS/Fe g-C3N4 heterostructure encapsulated into S/N-doped carbon nanofibers as an efficient anode material for sodium ion batteries

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 180567 - 180567

Published: April 1, 2025

Language: Английский