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Synthèse et caractérisation de nouveaux phosphates utilisés comme matériaux d'électrode positive pour batteries au lithium

Abstract : This work deals with the synthesis and characterization of new positive electrode materials for lithium batteries. Our researches were mainly focused on phosphates of transition metals, and especially on the tavorite-type materials of composition (H,Li)FePO4(OH). Their structure is characterized by a three-dimensional network with different types of tunnels, which can host inserted lithium ions. In this context, LiFePO4(OH) structure was perfectly solved, as well as that of FePO4.H2O, which is a new iron (III) phosphate discovered during this work. These two materials, together with those obtained by heat-treatment of FePO4.H2O, were characterized using different analytical techniques. Their electrochemical behavior toward intercalation / deintercalation of lithium was also studied, as well as the structural and redox processes involved.
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https://tel.archives-ouvertes.fr/tel-00582969
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Submitted on : Monday, April 4, 2011 - 2:58:09 PM
Last modification on : Wednesday, March 21, 2018 - 2:59:44 PM

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  • HAL Id : tel-00582969, version 1

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Nicolas Marx. Synthèse et caractérisation de nouveaux phosphates utilisés comme matériaux d'électrode positive pour batteries au lithium. Matériaux. Université Sciences et Technologies - Bordeaux I, 2010. Français. ⟨tel-00582969⟩

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