Abstract: A positive electrode for lithium ion secondary batteries includes a collector and a positive electrode active material layer formed on at least one surface of the collector. The positive electrode active material layer contains a lithium-containing metal oxide having a unit cell represented by the following formula and a conductive material and has voids with a volume of 0.82×10?3 cm3/cm2 to 7.87×10?3 cm3/cm2 per unit area of the collector: LiFe1-xZrxP1-ySiyO4??(1) where 0<x<1 and 0<y<1. The unit cell has lattice constants satisfying 10.326?a?10.335, 6.006?b?6.012, and 4.685?c?4.714. The sum of the volume of the lithium-containing metal oxide and the volume of the conductive material is 1.61×10?3 cm3/cm2 to 6.46×10?3 cm3/cm2 per unit area of the collector.

Abstract: Provided is a tape-shaped electrode that can effectively perform discharging and recharging even if the size thereof is increased. The tape-shaped electrode includes a plurality of conductive plates, and insulating coupling members that separably couple the plurality of conductive plates arranged in one direction in an insulating state.

Abstract: A positive electrode active substance including a lithium-containing metal oxide represented by the following general formula (1): LiFe1-xMxP1-ySiyO4??(1) wherein M represents an element selected from Sn, Zr, Y, and Al; 0<x<1; and 0<y<1, wherein the lithium-containing metal oxide has a lattice constant and a half value width of a diffraction peak of a (011) plane.

Abstract: Provided is a positive electrode active material giving nonaqueous-electrolyte secondary batteries superior in cycle characteristics. The positive electrode active material according to the present invention includes a lithium-containing composite metal oxide having the composition represented by the following General Formula (1): LizFe1-xMxP1-ySiyO4??(1) (wherein M is at least one metal element selected from Zr, Sn, Y, and Al, 0.05<x<1, and 0.05<y<1), characterized in that: the positive electrode active material is in the single crystalline phase of the lithium-containing composite oxide represented by General Formula (1) when 1>z>0.9 to 0.75 or 0.25 to 0.1>z>0; the positive electrode active material has two crystalline phases of the lithium-containing composite oxides represented by the following General Formulae (2) and (3) when 0.9 to 0.75>z>0.25 to 0.1: LiaFe1-xMxP1-ySiyO4??(2) (wherein 0.75 to 0.9?a?1.00, 0.05<x<1, and 0.

Abstract: A positive electrode for lithium ion secondary batteries includes a collector and a positive electrode active material layer formed on at least one surface of the collector. The positive electrode active material layer contains a lithium-containing metal oxide having a unit cell represented by the following formula and a conductive material and has voids with a volume of 0.82×10?3 cm3/cm2 to 7.87×10?3 cm3/cm2 per unit area of the collector: LiFe1-xZrxP1-ySiyO4??(1) where 0<x<1 and 0<y<1. The unit cell has lattice constants satisfying 10.326?a?10.335, 6.006?b?6.012, and 4.685?c?4.714. The sum of the volume of the lithium-containing metal oxide and the volume of the conductive material is 1.61×10?3 cm3/cm2 to 6.46×10?3 cm3/cm2 per unit area of the collector.

Abstract: Provided is a tape-shaped electrode that can effectively perform discharging and recharging even if the size thereof is increased. The tape-shaped electrode includes a plurality of conductive plates, and insulating coupling members that separably couple the plurality of conductive plates arranged in one direction in an insulating state.

Abstract: The present invention provides a method for producing a lithium-containing composite oxide represented by general formula (1) below, the method at least including a step of preparing a solution by dissolving a lithium source, an element M source, a phosphorus source, and an element X source that serve as source materials in a solvent, the phosphorus source being added after at least the element M source is dissolved; a step of gelating the resulting solution; and a step of calcining the resulting gel: LixMyP1-zXzO4??(1) (where M represents at least one element selected from the group consisting of Fe, Ni, Mn, Zr, Sn, Al, and Y; X represents at least one element selected from the group consisting of Si and Al; and 0<x?2, 0.8?y?1.2, 0?z?1). According to the present invention, a positive electrode active material for lithium secondary batteries that offers high safety and high cost efficiency and are capable of extending battery life can be provided.

Abstract: A positive electrode active substance including a lithium-containing metal oxide represented by the following general formula (1): LiFe1-xMxP1-ySiyO4??(1) wherein M represents an element selected from Sn, Zr, Y, and Al; 0<x<1; and 0<y<1, wherein the lithium-containing metal oxide has a lattice constant and a half value width of a diffraction peak of a (011) plane.

Abstract: A positive electrode active substance comprising a lithium-containing metal oxide represented by the following general formula (1): LiFe1-xMxP1-ySiyO4??(1) wherein M represents an element selected from group III to group XIV; 0<x<1; and 0<y<1, having a volume of a unit lattice of 291.4 to 300.0 ?3 or 285.0 to 291.0 ?3, and having a half value width of a diffraction peak of a (011) surface of 0.30° or more.

Abstract: Provided is a positive electrode active material giving nonaqueous-electrolyte secondary batteries superior in cycle characteristics. The positive electrode active material according to the present invention includes a lithium-containing composite metal oxide having the composition represented by the following General Formula (1): LizFe1-xMxP1-ySiyO4 ??(1) (wherein M is at least one metal element selected from Zr, Sn, Y, and Al, 0.05<x<1, and 0.05<y<1), characterized in that: the positive electrode active material is in the single crystalline phase of the lithium-containing composite oxide represented by General Formula (1) when 1>z>0.9 to 0.75 or 0.25 to 0.1>z>0; the positive electrode active material has two crystalline phases of the lithium-containing composite oxides represented by the following General Formulae (2) and (3) when 0.9 to 0.75>z>0.25 to 0.1: LiaFe1-xMxP1-ySiyO4 ??(2) (wherein 0.75 to 0.9?a?1.00, 0.05<x<1, and 0.

Abstract: The present invention provides a method for producing a lithium-containing composite oxide represented by general formula (1) below, the method at least including a step of preparing a solution by dissolving a lithium source, an element M source, a phosphorus source, and an element X source that serve as source materials in a solvent, the phosphorus source being added after at least the element M source is dissolved; a step of gelating the resulting solution; and a step of calcining the resulting gel: LixMyP1-zXzO4??(1) (where M represents at least one element selected from the group consisting of Fe, Ni, Mn, Zr, Sn, Al, and Y; X represents at least one element selected from the group consisting of Si and Al; and 0<x?2, 0.8?y?1.2, 0?z?1). According to the present invention, a positive electrode active material for lithium secondary batteries that offers high safety and high cost efficiency and are capable of extending battery life can be provided.

Abstract: A positive electrode active substance comprising a lithium-containing metal oxide represented by the following general formula (1): LiFe1-xMxP1-ySiyO4??(1) wherein M represents an element selected from group III to group XIV; 0<x<1; and 0<y<1, having a volume of a unit lattice of 291.4 to 300.0 ?3 or 285.0 to 291.0 ?3, and having a half value width of a diffraction peak of a (011) surface of 0.30° or more.

Abstract: A cathodic active material according to the present invention has a composition represented by general formula (1): Li(1-a)AaFe(1-x-b)M(x-c)P(1-y)SiyO4??(1), where A is at least one type of element selected from the group consisting of Na, K, Fe, and M; Fe has an average valence of +2 or more; M is an element having a valence of +2 or more and at least one type of element selected from the group consisting of Zr, Sn, Y, and Al, the average valence of M being different from the average valence of Fe; 0<a?0.125; a=b+c+d, where b is the number of moles of Fe in A, c is the number of moles of M in A, and d is the total number of moles of Na and K in A; 0<x?0.5; and 0<y?0.5. This makes it possible to realize a cathodic active material that not only excels in terms of safety and cost but also can provide a long-life battery.