摘要:
A method for determining the self-discharge current of a lithium-ion battery provided with a positive electrode, a negative electrode, and an electrolyte arranged between the positive and negative electrodes includes charging the battery until a metal lithium layer is formed between the electrolyte and the negative electrode, measuring the open-circuit voltage of the battery at two moments, and determining the self-discharge current from the variation of the voltage measured between the two moments.
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 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:
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:
The present invention relates to a method for charging a lithium-ion accumulator with a negative electrode at an operating potential larger than 0.5 volts relatively to the Li+/Li pair, which comprises a first charging step at a constant voltage between 2 volts and 5 volts.
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 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.
摘要:
The invention relates to a material comprising carbon nanotubes, deposited at the surface of each of which is a substantially continuous film of nanoscale silicon particles, that can be used in negative electrodes for a lithium battery.
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.
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+.