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 cathode active material comprising a composition represented by the following general formula (1): LiaM1xM2yM3zPmSinO4??(1) wherein M1 is at least one kind of element selected from the group of Mn, Fe, Co and Ni; M2 is any one kind of element selected from the group of Ti, V and Nb; M3 is at least one kind of element selected from the group of Zr, Sn, Y and Al; “a” satisfies 0<a?1; “x” satisfies 0<x?2; “y” satisfies 0<y<1; “z” satisfies 0?z<1; “m” satisfies 0?m<1; and “n” satisfies 0<n?1.

Abstract: A method of producing a positive electrode active substance comprising steps of: dissolving a lithium source, an M source, a phosphorus source and an X source in amounts needed to form a lithium-containing composite oxide having an olivine structure and represented by the following general formula (1): LixMyP1-zXzO4??(1) wherein, in the formula, M is at least one kind of element selected from the group of Fe, Ni, Mn, Zr, Sn, Ti, Nb, V, Al and Y; X is at least one kind selected from the group of Si and Al; 0<x?2; 0.8?y?1.2; and 0?z?1, in a solvent being capable to dissolve these sources, thereby forming a solution; gelating the obtained solution by adding a cyclic ether compound and sintering the resulting gel to obtain the positive electrode active substance made of the lithium-containing composite oxide having an olivine structure that is covered with carbon deriving from the cyclic ether compound.

Abstract: A cathode active material comprising a composition represented by the following general formula (1): LiaM1xM2yM3zPmSinO4??(1) wherein M1 is at least one kind of element selected from the group of Mn, Fe, Co and Ni; M2 is any one kind of element selected from the group of Zr, Sn, Y and Al; M3 is at least one kind of element selected from the group of Zr, Sn, Y, Al, Ti, V and Nb and different from M2; “a” satisfies 0<a?1; “x” satisfies 0<x?2; “y” satisfies 0<y<1; “z” satisfies 0<z<1; “m” satisfies 0?m<1; and “n” satisfies 0<n?1.

Abstract: A method of producing a positive electrode active material, comprising the steps of: preparing a solution by dissolving, in a solvent, respective predetermined amounts of a lithium source, a M source, a phosphorus source and a X source necessary for forming a positive electrode active material represented by the following general formula (1) having an olivine structure; gelating the obtained solution by addition of a cyclic ether; and calcinating the generated gel to obtain a carbon-coated lithium-containing composite oxide, wherein the positive electrode active material is represented by the general formula (1): LixMyP1-zXzO4??(1) wherein M is at least one element selected from the group consisting of Fe, Ni, Mn, Zr, Sn, Al and Y, X is at least one selected from the group consisting of Si and Al, and 0<x?2, 0.8?y?1.2, 0?z?1.

Abstract: A cathode active material of the present invention for use in a nonaqueous secondary battery, the cathode active material includes: a main crystalline phase including a lithium-containing transition metal oxide containing manganese and having a spinel structure; and a sub crystalline phase contained in the main crystalline phase, the sub crystalline phase being identical in oxygen arrangement to the lithium-containing transition metal oxide and different in elementary composition from the lithium-containing transition metal oxide, a main crystalline phase part around the sub crystalline phase and the sub crystalline phase having a same crystal orientation.

Abstract: A cathode active material of the present invention is a cathode active material having a composition represented by General Formula (1) below, LiFe1-xMxP1-ySiyO4??(1), where: an average valence of Fe is +2 or more; M is an element having a valence of +2 or more and is at least one type of element selected from the group consisting of Zr, Sn, Y, and Al; the valence of M is different from the average valence of Fe; 0<x?0.5; and y=x×({valence of M}?2)+(1?x)×({average valence of Fe}?2). This provides a cathode active material that not only excels in terms of safety and cost but also can provide a long-life battery.

Abstract: A positive active material according to the present invention used in a nonaqueous secondary battery, includes a lithium-containing transition metal oxide containing manganese, as a crystal structure of a main crystalline phase, and a sub oxide and tin (IV) oxide, each of which having an oxygen arrangement identical to that of the lithium-containing transition metal oxide however has a different element composition, the sub oxide and tin (IV) oxide being included in a state in which presence of the sub oxide and tin (IV) oxide is confirmable by diffractometry.

Abstract: A cathode active material of the present invention for use in a nonaqueous secondary battery includes: a main crystalline phase including a lithium-containing transition metal oxide containing manganese and having a spinel structure; and a sub crystalline phase which is in a layer shape and which is contained in the main crystalline phase, the sub crystalline phase being identical in oxygen arrangement to the lithium-containing transition metal oxide and different in elementary composition from the lithium-containing transition metal oxide, the main crystalline phase being in an octahedral shape having a plurality of edges, the plurality of edges including a longest edge having a length of not greater than 300 nm.

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 cathode active material (1) of the present invention includes: a main crystalline phase (2) including a lithium-containing transition metal oxide containing manganese and having a spinel structure, and in the cathode active material used in a nonaqueous secondary battery, the main crystalline phase (2) includes a layer-shaped sub crystalline phase (3) which is different in elementary composition from that of the lithium-containing transition metal oxide but having an oxygen arrangement identical to that of the lithium-containing transition metal oxide and which has a spinel structure.

Abstract: An multiple inorganic compound (1) according to the present invention is a multiple inorganic compound (1) including a main crystalline phase (2) including an inorganic compound, the main crystalline phase (2) including a sub crystalline phase (3) having an elementary composition different from that of the main crystalline phase (2) however including a non-metallic element arrangement identical to that of the main crystalline phase 2. Furthermore, each of the main crystalline phase (2) and the sub crystalline phase (3) include at least one metallic element, and the at least one of the metallic element included in the sub crystalline phase (3) is identical to a metallic element included in the main crystalline phase (2), which metallic element identical to that included in the sub crystalline phase is formed as a solid solution in the main crystalline phase (2).

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.

Abstract: The present invention allows production of a battery which not only excels in terms of safety and cost, but also has a long life. A cathode active material of the present invention is represented by the following General Formula (1): LiyKaFe1-xXxPO4??(1), where X is at least one element of groups 2 through 13; 0<a?0.25; 0?x?0.25; and y is (1?a), a volume of a unit lattice for a case in which y in General Formula (1) is (x?a) (when x?a<0, y is 0) having a change ratio of not more than 4% with respect to a volume of a unit lattice for a case in which y in General Formula (1) is (1?a).

Abstract: The present invention realizes a cathode active material which not only excels in safety and cost but also makes it possible to provide a long-life battery. The cathode active material is represented by the general formula (1): Li1-xAxFe1-yMyP1-zAlzO4??(1) wherein A is at least one selected from the elements of groups 1 through 13; M is at least one selected from the elements of groups 2 through 14; and 0?x?0.25, 0?y?0.25, 0<z?0.25, and x+y>0.

Abstract: A lithium secondary battery which comprises: a negative electrode comprising as an active material a carbonaceous material capable of electrochemically holding/releasing lithium; a positive electrode comprising as an active material a lithium chalcogenide; and polymer electrolyte layers united respectively with the negative electrode and the positive electrode. The polymer electrolyte layers comprise an ionically conductive polymer matrix holding a nonaqueous electrolytic solution. They are obtained by crosslinking and polymerizing a liquid mixture of a monomeric precursor for the ionically conductive polymer and the nonaqueous electrolytic solution respectively on the negative electrode and the positive electrode using different polymerization initiators.

Abstract: A polymer battery having at least one layer of a positive electrode, at least one layer of a polymer electrolyte retained by a separator and at least one layer of a negative electrode, each of which is in a thin film form, stacked in this order, wherein the entirety of the outer peripheries of the separator and of the negative electrode is positioned outside of the outer periphery of the positive electrode except for a collector tab (49 provided to the positive electrode so as to protrude from one side of the positive electrode, and the following relationship is satisfied in a portion of the outer peripheries of the separator and of the negative electrode: the length between the end of the negative electrode and the end of the positive electrode (D1) >the length between the end of the negative electrode and the end of the separator (D2).

Abstract: To provide a secondary battery that is capable of shortening injecting time for injecting an electrolytic solution, and infiltrating the electrolytic solution uniformly, during a process for preparing the secondary battery. Also, to provide the secondary battery in which discordance of layers of positive-electrode plates, negative-electrode plates, and separators does not easily occur during a process for laminating them and the following process.

Abstract: A polymer battery which comprises a negative electrode comprising a carbon material as an active material, an electrolyte layer and a positive electrode comprising a chalcogenide containing lithium as an active material, characterized in that the electrolyte layer comprises an ion-conducting compound and a polymer fiber, and the carbon material comprises the graphite particles having amorphous carbon adhered on the surface thereof. The polymer battery is capable of preventing the decomposition of the ion-conductive material by graphite particles.