Article (Scientific journals)
Enhancement of the Na2FePO4F@gC3N4 electrochemical performance in view of its implementation in sodium-ion batteries
El Kacemi, Zineb; Fkhar, Lahcen; El Maalam, Khadija et al.
2023In Solid State Ionics, 392, p. 116167
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Keywords :
Fluorophosphate; Sodium-ion batteries; cathode
Abstract :
[en] Na2FePO4F fluorophosphate has long been regarded as potential cathode material for sodium-ion batteries (SIBs) due to its undeniable economic and environmental advantages. Herein, the preparation of Na2FePO4F powder using an easier and cost-effective technique is reported. The prepared compound, using phosphoric acid as P-source, crystallizes in an orthorhombic structure with the Pbcn space group as confirmed by X-Ray Diffraction (XRD) analysis. The pristine material (refers to as PM) is combined with different percentages of graphitic carbon nitride g-C3N4 as a carbon source (15% and 20%), to build large specific surfaces, boost electronic conductivity, and achieve the optimal carbon content. Raman spectrum reveals the existence of residual carbon denoting that the in-situ carbon coating process is successful. Thermogravimetric analysis (TGA) confirmed the stability of iron fluorophosphate at temperatures of 750 °C. Scanning electron microscope (SEM), and energy-dispersive X-ray spectroscopy (EDS) are used to investigate the materials' surface morphology and particle size. The performance of 15% and 20% g-C3N4 coated materials are tested as cathodes in both pure 1 M NaClO4 in polycarbonate electrolyte and in added 5% fluoroethylene carbonate electrolyte. High cycling properties and improved electrochemical performance were revealed when compared to the additive-free electrolyte.
Disciplines :
Chemistry
Author, co-author :
El Kacemi, Zineb
Fkhar, Lahcen ;  Université de Liège - ULiège > Complex and Entangled Systems from Atoms to Materials (CESAM)
El Maalam, Khadija
Aziam, Hasna
Youcef, Hicham Ben
Saadoune, Ismael
Mahmoud, Abdelfattah  ;  Université de Liège - ULiège > Département de chimie (sciences) > Chimie inorganique structurale et Chimie des matériaux inorganiques (LCIS-GreenMAT)
Boschini, Frédéric ;  Université de Liège - ULiège > Département de chimie (sciences) > Plateforme APTIS (Advanced Powder Technology and Innovative Solutions)
Ali, Mustapha Ait
Mounkachi, Omar
Balli, Mohamed
Language :
English
Title :
Enhancement of the Na2FePO4F@gC3N4 electrochemical performance in view of its implementation in sodium-ion batteries
Publication date :
April 2023
Journal title :
Solid State Ionics
ISSN :
0167-2738
Publisher :
Elsevier BV
Volume :
392
Pages :
116167
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 14 February 2023

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