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Local structure and redox energies of lithium phosphates with olivine- and Nasicon-like structures

Abstract : An experimental relationship between local structure and electrochemical properties is established for lithium metal phosphates LiMePO4 (Me = Fe, Co, Mn), LiFeP2O7 and Li3Fe2(PO4)3 which crystallise with either the olivine-like or the Nasicon-like structure. Structural features of several lithium metal phosphates are investigated by a local probe such as the FTIR spectroscopy in order to explain the influence of either PO43− or P2O74− covalent bonds on redox energies. The local cationic arrangement is also discussed with the aid of a molecular vibration model to figure out the strong covalent bonds within a PO43− complex for glassy Nasicon compounds.
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https://hal.archives-ouvertes.fr/hal-00017240
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Submitted on : Wednesday, January 18, 2006 - 11:02:00 AM
Last modification on : Sunday, June 26, 2022 - 9:48:01 AM

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A. Ait Salah, P. Jozwiak, J. Garbarczyk, K. Benkhouja, K. Zaghib, et al.. Local structure and redox energies of lithium phosphates with olivine- and Nasicon-like structures. Journal of Power Sources, Elsevier, 2004, 140 (2), pp.370. ⟨10.1016/j.jpowsour.2004.08.029⟩. ⟨hal-00017240⟩

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