摘要:
L'invention concerne un procédé de synthèse de particules ayant une dimension de 0,05 à 30 µm d'un matériau C-LiMPO 4 dans lequel dans lequel C- représente du carbone ponté à un oxyde complexe LiMPO 4 ayant sensiblement une structure olivine, M est Mn, Fe, Co ou Ni, éventuellement remplacé partiellement par un ou plusieurs autres métaux de valence comprise entre 2 et 3 et P est éventuellement remplacé partiellement par au moins un élément choisi parmi Si, S, A1 et As. La synthèse est effectuée par mise en équilibre dans les proportions requises d'un mélange de précurseurs avec une atmosphère gazeuse dans des conditions de température et de durée telles que l'atmosphère réative est capable de réduire le ou les éléments de transition à leur état d'oxydation requis dans LiMPO 4 , la température et la durée de la synthèse étant inférieures respectivement à la température et à la durée amenant une réduction du ou des éléments de transition à l'état métallique ou une oxydation du carbone résultant de la pyrolyse de la substance organique, et le procédé comportant au moins une étape de pyrolyse du composé source de carbone.
摘要:
Orthosilicates containing the SiO 4 4- tetranion as the building block are used as redox materials by incorporation of at least one transition elements with at least two valency levels. Lithium ingresses or egresses from the structure to compensate for the valency change of the redox couples during electrode operation and keep overall electroneutrality.
摘要:
Orthosilicates containing the SiO4 tetranion as the building block are used as redox materials by incorporation of at least one transition elements with at least two valency levels. Lithium ingresses or egresses from the structure to compensate for the valency change of the redox couples during electrode operation and keep overall electroneutrality.
摘要:
Orthosilicates containing the SiO4 tetranion as the building block are used as redox materials by incorporation of at least one transition elements with at least two valency levels. Lithium ingresses or egresses from the structure to compensate for the valency change of the redox couples during electrode operation and keep overall electroneutrality.
摘要:
Orthosilicates containing the SiO 4 4- tetranion as the building block are used as redox materials by incorporation of at least one transition elements with at least two valency levels. Lithium ingresses or egresses from the structure to compensate for the valency change of the redox couples during electrode operation and keep overall electroneutrality.
摘要:
Orthosilicates containing the SiO 4 4- tetranion as the building block are used as redox materials by incorporation of at least one transition elements with at least two valency levels. Lithium ingresses or egresses from the structure to compensate for the valency change of the redox couples during electrode operation and keep overall electroneutrality.
摘要:
Orthosilicates containing the SiO 4 4- tetranion as the building block are used as redox materials by incorporation of at least one transition elements with at least two valency levels. Lithium ingresses or egresses from the structure to compensate for the valency change of the redox couples during electrode operation and keep overall electroneutrality.
摘要:
The invention relates to a process for preparing an at least partially lithiated transition metal oxyanion-based lithium-ion reversible electrode material, which comprises providing a precursor of said lithium-ion reversible electrode material, heating said precursor, melting same at a temperature sufficient to produce a melt comprising an oxyanion containing liquid phase, cooling said melt under conditions to induce solidification thereof and obtain a solid electrode that is capable of reversible lithium ion deinsertion/insertion cycles for use in a lithium battery. The invention also relates to lithiated or partially lithiated oxyanion-based-lithium-ion reversible electrode materials obtained by the aforesaid process.