Article (Scientific journals)
Optimizing the electrochemical activity and understanding the reaction mechanism of Li3.27FeII0.19FeIII0.81V(PO4)3 cathode material for lithium-ion batteries
Aziam, Hasna; Mahmoud, Abdelfattah; Mikhailova, Daria et al.
2023In Journal of Power Sources, 575, p. 233190
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Keywords :
57Fe Mӧssbauer spectroscopy; Energy storage; EXAFS; Lithium-ion batteries; Magnetic measurements; Phosphate; 57fe mӧssbaue spectroscopy; Cathodes material; Cost effective; Cost-efficient; Eco-friendly; Electrochemical activities; Reaction mechanism; Structure materials; Type structures; Renewable Energy, Sustainability and the Environment; Energy Engineering and Power Technology; Physical and Theoretical Chemistry; Electrical and Electronic Engineering
Abstract :
[en] This work reports the synthesis of a NaSICON-type structure material, a cost-efficient electrode for lithium-ion batteries, by the substitution of vanadium with cost-effective and eco-friendly iron. Li3.27FeII0.19FeIII0.81V(PO4)3 was synthesized using sol-gel followed by a calcination at 450 °C under argon. XRD has confirmed the successful preparation of a compound isostructural to Li3V2(PO4)3 which crystallizes in a monoclinic structure with the P21/c space group. The electrochemical properties of the novel phosphate were explored at different cut-off voltage windows (2.0–4.2 V, 2.8–4.5 V, 1.4–4.5 V, and 1.0–4.6 V), and using three electrolytes (LP30, LP40, and LP50). The best electrochemical performance was obtained at C/2 over 1.4–4.5 V voltage range and using LP40 delivering a reversible capacity of 150 mAh g−1 after 55 cycles with coulombic efficiency and capacity retention of 99% and 79%, respectively. 57Fe Mӧssbauer spectroscopy evidenced the contribution of Fe2+/Fe3+ redox couple upon the electrochemical reaction. Magnetic measurements revealed the oxidation of the transition metals during the charge process. XAFS study around V and Fe at K-edge revealed the successful substitution of Fe in the V site with a reorganization of the local structure at short and medium range order.
Disciplines :
Chemistry
Author, co-author :
Aziam, Hasna ;  High Throughput Multidisciplinary Research Laboratory (HTMR), Mohammed VI Polytechnic University (UM6P), Ben Guerir, Morocco
Mahmoud, Abdelfattah  ;  Université de Liège - ULiège > Département de chimie (sciences) > Chimie inorganique structurale et Chimie des matériaux inorganiques (LCIS-GreenMAT)
Mikhailova, Daria;  Leibniz Institute for Solid State and Materials Research (IFW) Dresden e.V., Dresden, Germany
Harfouche, Messaoud ;  Synchrotron-light for Experimental Science and Applications in the Middle East (SESAME), Allan, Jordan
Saadoune, Ismael;  IMED, Faculty of Science and Technology- Cadi Ayyad University (UCA), Marrakesh, Morocco ; Applied Chemistry and Engineering Research Centre of Excellence (ACER CoE), Mohammed VI Polytechnic University, Ben Guerir, Morocco
Ben Youcef, Hicham ;  High Throughput Multidisciplinary Research Laboratory (HTMR), Mohammed VI Polytechnic University (UM6P), Ben Guerir, Morocco ; Applied Chemistry and Engineering Research Centre of Excellence (ACER CoE), Mohammed VI Polytechnic University, Ben Guerir, Morocco
Language :
English
Title :
Optimizing the electrochemical activity and understanding the reaction mechanism of Li3.27FeII0.19FeIII0.81V(PO4)3 cathode material for lithium-ion batteries
Publication date :
15 August 2023
Journal title :
Journal of Power Sources
ISSN :
0378-7753
Publisher :
Elsevier B.V.
Volume :
575
Pages :
233190
Peer reviewed :
Peer Reviewed verified by ORBi
Funding text :
The authors are grateful to OCP group for the financial support through the programs APRD & APPHOS (Project: e-Store: 2016–2025). Prof. Aziam would like to thank Dr. Noha Sabi for performing EDS-mapping analysis.
Available on ORBi :
since 21 June 2023

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