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    Université de Fribourg

    Li0.5Ni0.5Ti1.5Fe0.5(PO4)3/C electrode material for lithium ion batteries exhibiting faster kinetics and enhanced stability

    Srout, Mohammed ; Kwon, Nam Hee ; Ben Youcef, Hicham ; Semlal, Nawal ; Fromm, Katharina M. ; Saadoune, Ismael

    In: ACS Applied Materials & Interfaces, 2020, vol. 12, no. 16, p. 18496–18503

    Natrium super ionic conductor (NASICON) materials providing attractive properties such as high ionic conductivity and good structural stability are considered as very promising materials for use as electrodes for lithium- and sodium-ion batteries. Herein, a new high-performance electrode material, Li0.5Ni0.5Ti1.5Fe0.5(PO4)3/C, was synthesized via the sol–gel method and was...

    Université de Fribourg

    Improvement of the electrochemical performance by partial chemical substitution into the lithium site of titanium phosphate-based electrode materials for lithium-ion batteries: LiNi0.25Ti1.5 Fe0.5(PO4)3

    Srout, Mohammed ; Kazzi, Mario El ; Youcef, Hicham Ben ; Fromm, Katharina M. ; Saadoune, Ismael

    In: Journal of Power Sources, 2020, vol. 461, p. 228114

    Partial lithium substitution with nickel (0.25 of Ni2+ ion) in the previously reported Li1.5Fe0.5Ti1.5(PO4)3/C (LFTP@C) was performed to improve its structural and electrochemical properties. The new LiNi0.25Fe0.5Ti1.5(PO4)3/C (LNFTP@C) material was then tested as electrode for lithium ion batteries. In the voltage window 1.85V–3.0 V vs. Li+/Li, attractive electrochemical performances were...

    Université de Fribourg

    Surface modifications of positive-electrode materials for lithium ion batteries

    Kwon, Nam Hee ; Conder, Joanna ; Srout, Mohammed ; Fromm, Katharina M.

    In: CHIMIA International Journal for Chemistry, 2019, vol. 73, no. 11, p. 880–893

    Lithium ion batteries are typically based on one of three positive-electrode materials, namely layered oxides, olivine- and spinel-type materials. The structure of any of them is 'resistant' to electrochemical cycling, and thus, often requires modification/post- treatment to improve a certain property, for example, structural stability, ionic and/or electronic conductivity. This review...

    Université de Fribourg

    New Ni0.5Ti2 (PO4)3@C NASICON-type electrode material with high rate capability performance for lithium-ion batteries: Synthesis and electrochemical properties

    Srout, Mohammed ; Kwon, Nam Hee ; Luo, Wen ; Züttel, Andreas ; Fromm, Katharina M. ; Saadoune, Ismael

    In: ChemSusChem, 2019, vol. 12, no. 21, p. 4846–4853

    Ni0.5Ti2(PO4)3/C NASICON‐type phosphate is introduced as a new anode material for lithium‐ion batteries (LIBs). Ni0.5Ti2(PO4)3/C was synthesized through the sol–gel route and delivered some remarkable electrochemical performances. Specifically, the Ni0.5Ti2(PO4)3/C electrode demonstrates a high rate capability performance and delivers high reversible capacities ranging from...