Abstract:
The invention relates to a method for the production of a crystal material with formula LIMPO4, where "M" is a transition metal, the method providing the steps of grinding and mixing at the solid state an organic phosphonate of a transition metal with a lithium salt and causing them to react together by pyrolysis at the solid state and high temperature by one or more heating cycles. It is thus obtained a micrometric size crystal material already containing carbon without the latter should be added thereafter. According to the invention, carbon forms inside the material during its pyrolysis directly to the surface of the lithium iron phosphate particles, interacting with the latter and ensuring an optimum electron drain.
Abstract:
The invention relates to a method for the production of a crystal material with formula LIMPO4, where "M" is a transition metal, the method providing the steps of grinding and mixing at the solid state an organic phosphonate of a transition metal with a lithium salt and causing them to react together by pyrolysis at the solid state and high temperature by one or more heating cycles. It is thus obtained a micrometric size crystal material already containing carbon without the latter should be added thereafter. According to the invention, carbon forms inside the material during its pyrolysis directly to the surface of the lithium iron phosphate particles, interacting with the latter and ensuring an optimum electron drain.
Abstract:
The invention relates to a method for the production of a crystal material with formula LIMPO4, where "M" is a transition metal, the method providing the steps of grinding and mixing at the solid state an organic phosphonate of a transition metal with a lithium salt and causing them to react together by pyrolysis at the solid state and high temperature by one or more heating cycles. It is thus obtained a micrometric size crystal material already containing carbon without the latter should be added thereafter. According to the invention, carbon forms inside the material during its pyrolysis directly to the surface of the lithium iron phosphate particles, interacting with the latter and ensuring an optimum electron drain.
Abstract:
A lithium or lithium-ion rechargeable battery with improved cycling performance, with nominal voltage of 4 V, comprising an anode made of lithium optionally alloyed with other metals, or an anode made of an electrically conductive material wherein lithium is intercalated in ionic form, a non-aqueous electrolyte and a cathode based on a modified manganese spinel, characterised in that said spinel is modified by the substitution of a portion of manganese with an equal amount of gallium, according to the formula: LiGaxMn2-xO4 (wherein 0