摘要:
A lithium storage cell comprises at least a first electrode comprising an active material wherein Li+ cations can be inserted, a second electrode and an electrolyte. The active material of the first electrode comprises a linear condensed compound comprising at least two tetrahedra, respectively of AO4 and A′O4 type, bonded by a common oxygen atom. A transition metal ion M2+ with a degree of oxidation of +2 selected from the group consisting of Ni2+, Co2+, Mn2+, Fe2+ and Ti2+ is inserted in the linear condensed compound, and the ratio between the number of Li+ cations able to be inserted in the active material and the number of transition metal ions M2+ is strictly greater than 1. A and A′ are selected from the group consisting of P5+, Si4+, Al3+, S6+, Ge4+, B3+.
摘要:
The present invention relates to a method of chemically modifying a lithium-based oxide comprising at least one transition metal, which comprises, in succession: a step of bringing said oxide into contact with an aqueous solution comprising phosphate ions; a step of separating said oxide from the aqueous solution; and a step of drying said oxide. Use of the modified lithium transition metal oxide as active positive electrode material for a lithium secondary battery.
摘要:
A powdery compound of mixed titanium lithium oxide, preferably used as active material of an electrode for a lithium storage battery, consists of particles having a diameter smaller than or equal to 1 μm and of at least 10% by volume of grains having a diameter smaller than or equal to 100 μm. It is formed by agglomeration of said particles. The method for producing such a compound preferably consists in grinding the synthesized oxide for a duration comprised between 24 hours and 48 hours in a planetary mill and in then performing thermal treatment at a temperature comprised between 450° C. and 600° C.
摘要:
A material or compound is provided having a spinel structure and corresponding to the formula LiyNi0.5Mn1.5−xIVMnxIIIAzO4−d, where: 0.02≦x≦0.35; d>0; A is selected from the group comprising Na, K, Mg, Nb, Al, Ni, Co, Zr, Cr, Fe, Cu, Ti, Zn, Si and Mo; 0.8≦y≦1.2; 0≦z≦0.1; and has a mesh parameter of between 8.174 and 8.179 Å.
摘要翻译:提供了具有尖晶石结构并对应于Li y Ni 0.5 Mn 1.5-x IV Mn x IIa z O 4-d的材料或化合物,其中:0.02≦̸ x≦̸ 0.35; d> 0; A选自Na,K,Mg,Nb,Al,Ni,Co,Zr,Cr,Fe,Cu,Ti,Zn,Si和Mo; 0.8≦̸ y≦̸ 1.2; 0≦̸ z≦̸ 0.1; 并具有介于8.174与8.179之间的网格参数。
摘要:
A material or compound is provided having a spinel structure and corresponding to the formula LiyNi0.5Mn1.5-xIVMnxIIIAzO4-d, where: 0.02≦x≦0.35; d>0; A is selected from the group comprising Na, K, Mg, Nb, Al, Ni, Co, Zr, Cr, Fe, Cu, Ti, Zn, Si and Mo; 0.8≦y≦1.2; 0≦z≦0.1; and has a mesh parameter of between 8.174 and 8.179 Å.
摘要翻译:提供具有尖晶石结构并对应于Li y Ni 0.5 Mn 1.5-x IV Mn x Al x O 4-d的材料或化合物,其中:0.02 <= x <= 0.35; d> 0; A选自Na,K,Mg,Nb,Al,Ni,Co,Zr,Cr,Fe,Cu,Ti,Zn,Si和Mo; 0.8 <= y <= 1.2; 0 <= z <= 0.1; 并具有介于8.174与8.179之间的网格参数。
摘要:
This material or spinel structure compound has the formula LiyNi0.5−xMn1.5+xO4−δ where: 0.9 0. Also, it has a lattice parameter of 8.167 to 8.190 Å, preferably from 8.179 to 8.183 Å.
摘要翻译:该材料或尖晶石结构化合物具有以下分子式Li x Ni 0.5-x Mn 1.5 + x O 4-δ/ / SUB >其中:0.9 0。 此外,其具有8.167至8.190的晶格参数,优选为8.179至8.183。
摘要:
The LiMPO4 compound is synthesized by reacting a compound of general formula XMPO4, nH2O where X represents a radical selected from —NH4 and —H and M is a transition metal selected from Co, Ni and Mn, with a lithium source such as lithium nitrate, at a temperature lower than or equal to 350° C. The XMPO4, nH2O compound further exhibits a particular morphology in the form of platelets that is preserved during the reaction between the two precursors. The LiMPO4 compound thus synthesized is advantageously used as active material of an electrode for a lithium storage battery.
摘要:
A non-volatile electrochemical memory cell formed of a stack of thin films comprising at least one first active layer, suited to releasing and accepting, in a reversible manner, at least one ion species, at least one second active layer, suited to releasing and accepting said ion species, in a reversible manner, the active layers being based on materials having different compositions and electrochemical potential profiles.
摘要:
A lithium storage cell comprises at least a first electrode comprising an active material wherein Li+ cations can be inserted, a second electrode and an electrolyte. The active material of the first electrode comprises a linear condensed compound comprising at least two tetrahedra, respectively of AO4 and A′O4 type, bonded by a common oxygen atom. A transition metal ion M2+ with a degree of oxidation of +2 selected from the group consisting of Ni2+, Co2+, Mn2+, Fe2+ and Ti2+ is inserted in the linear condensed compound, and the ratio between the number of Li+ cations able to be inserted in the active material and the number of transition metal ions M2+ is strictly greater than 1. A and A′ are selected from the group consisting of P5+, Si4+, Al3+, S6+, Ge4+, B3+.
摘要:
The invention relates to a lithium battery, comprising at least one lithium intercalation compound, made up of crystallites and obtained by a production method, comprising at least the following steps: formation of a homogeneous mixture of at least one precursor for the lithium intercalation compound with a given adjunct, chemically stable with relation to crystallites and designed to limit the growth of crystallites or crystallite precursors during the formation thereof, thermal treatment of the homogeneous mixture for the synthesis of the lithium intercalation compound in the form of crystallites and to give a composite material comprising at least two phases formed respectively by the lithium intercalation compound and the adjunct and forming of the composite material to give said electrode. The invention further relates to an electrode obtained by said method and lithium battery comprising such an electrode.