Studies on glass transition of lithium-iron phosphate glasses

I. Gorzkowska (1) , P. Jozwiak (2) , J. E. Garbarczyk , M. Wasiucionek (2) , Christian Julien (3)

1 Faculty of Chemistry
2 Faculty of Physics
3 INSP - Institut des Nanosciences de Paris

Amorphous analogs of lithium-iron phosphates (LFP) were prepared by standard press-quenching method and their thermal stabilities as well as structural properties were studied for the first time. Glass transition temperature T-g determined by DTA method was observed at the temperature range 492-523 degrees C, depending on the glass composition. The maxima of crystallization peaks were observed in the 555-579 degrees C range. In products obtained after heating LIP to 700 degrees C the XRD patterns have revealed the presence of: LiFePO4 (triphylite), FePO4 (heterosite), alpha-FePO4 (quartz like structure) and Li3Fe2(PO4)(3) (Nasicon like structure) phases.

Mots clés: cathode materials; DTA; Li-ion batteries; lithium-iron phosphate glasses; phospho-olivines

Domaines: Matière Condensée [cond-mat]

I. Gorzkowska, P. Jozwiak, J. E. Garbarczyk, M. Wasiucionek, Christian Julien. Studies on glass transition of lithium-iron phosphate glasses. Journal of Thermal Analysis and Calorimetry, 2008, 93 (3), pp.759-762. ⟨10.1007/s10973-008-9141-9⟩. ⟨hal-01281488⟩