Article (Scientific journals)
Downsizing and coating effects on the electrochemical performance of Mn-doped iron fluorophosphate as cathode material for sodium-ion batteries
El Kacemi, Zineb; Fkhar, Lahcen; El Maalam, Khadija et al.
2024In Journal of Physics and Chemistry of Solids, 190, p. 112008
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Keywords :
Carbon coating; Fluorophosphate; Positive electrode material; Sodium-ion batteries; Cathodes material; Dopamine; Electrochemical performance; Fluoro-phosphates; Lithium ions; Mn-doped; Positive-electrode materials; Production methods; Sodium ion batteries; Chemistry (all); Materials Science (all); Condensed Matter Physics
Abstract :
[en] Sodium Mn-doped iron fluorophosphate Na2Fe0·5Mn0·5PO4F is a potential positive electrode material for lithium-ion and sodium-ion batteries. This study outlines the synthesis of Na2Fe0·5Mn0·5PO4F powder through a simplified and more accessible production method. The X-rays diffraction (XRD) technique showed a pure phase with monoclinic symmetry (S.G. P21/n). The resulting uncoated material (labeled as NFeMPF) was ball-milled with dopamine hydrochloride (mentioned as dopamine hereafter) as a carbon source to enhance the specific surface and improve its electronic conductivity. Raman spectra confirmed the presence of residual carbon after the pyrolysis process. Thermogravimetric analysis (TGA) demonstrated the stability of Mn-doped iron fluorophosphate up to 1000 °C. Additionally, Mössbauer spectroscopy disclosed structural improvements in the material, indicating the reduction of all Fe(III) when coated with dopamine. The uncoated material discharge capacity when cycled against sodium exhibits reversible capacities of only 80, 67, and 38 mAh/g during the first cycle at C/20, C/16, and C/5, respectively. The coated NFeMPF@D delivered improved capacities of 272 and 202 mAh/g at C/20 and C/16, respectively. This highlights the considerable promise of the investigated phosphate-based electrode material as a cathode composite for the next generation of sodium-ion batteries.
Disciplines :
Chemistry
Author, co-author :
El Kacemi, Zineb ;  AMEEC Team, LERMA, College of Engineering & Architecture, International University of Rabat, Morocco
Fkhar, Lahcen ;  Université de Liège - ULiège > Complex and Entangled Systems from Atoms to Materials (CESAM)
El Maalam, Khadija;  Durability and Engineering of Materials Center, Moroccan Foundation for Advanced Science, Innovation and Research (MAScIR), Mohammed VI Polytechnic University, Hay Moulay Rachid Ben Guerir, Morocco
Aziam, Hasna;  High Throughput Multidisciplinary Research (HTMR), Mohammed VI Polytechnic University (UM6P), Ben Guerir, Morocco
Ben Youcef, Hicham;  High Throughput Multidisciplinary Research (HTMR), Mohammed VI Polytechnic University (UM6P), Ben Guerir, Morocco
Saadoune, Ismael;  Mohammed VI Polytechnic University, Ben Guerir, Morocco
Mahmoud, Abdelfattah  ;  Université de Liège - ULiège > Département de chimie (sciences) > GREEnMat
Boschini, Frédéric ;  Université de Liège - ULiège > Département de chimie (sciences) > GREEnMat
Mounkachi, Omar;  Laboratory of Condensed Matter and Interdisciplinary Sciences (LaMCScI), Faculty of Sciences, Mohammed V University in Rabat, Morocco ; College of computing, Mohammed VI Polytechnic University, Ben Guerir, Morocco
Balli, Mohamed ;  AMEEC Team, LERMA, College of Engineering & Architecture, International University of Rabat, Morocco ; Department of Mechanical Engineering, Faculte de Genie, Université de Sherbrooke, Quebec, Canada
Language :
English
Title :
Downsizing and coating effects on the electrochemical performance of Mn-doped iron fluorophosphate as cathode material for sodium-ion batteries
Publication date :
July 2024
Journal title :
Journal of Physics and Chemistry of Solids
ISSN :
0022-3697
Publisher :
Elsevier Ltd
Volume :
190
Pages :
112008
Peer reviewed :
Peer Reviewed verified by ORBi
Funding text :
This work is financially supported by the International University of Rabat (UIR) and the project \u2018Mat\u00E9riaux \u00E0 base de phosphate pour batteries \u00E0 haute densit\u00E9 d\u2019\u00E9nergie-PhNAMathex\u2019 of the IRESEN institute. Financial support from OCP through APPHOS & APRD programs is highly acknowledged. This work was performed in the framework of the International Research Project, IRP ATLAS.
Available on ORBi :
since 19 July 2024

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