Abstract: It is an object of the present disclosure to provide a nonaqueous electrolyte secondary battery with improved room-temperature regeneration. The present disclosure provides a nonaqueous electrolyte secondary battery that includes an electrode assembly having a structure in which a positive plate and a negative plate are stacked with a separator therebetween and also includes a nonaqueous electrolyte. The positive plate contains a lithium transition metal oxide, an element belonging to the group 5 or 6 of the periodic table, and a phosphoric acid compound. The nonaqueous electrolyte contains 1,2-dimethoxyethane.

Abstract: It is an object of the present invention to improve the low-temperature output characteristics of a nonaqueous electrolyte secondary battery. A nonaqueous electrolyte secondary battery according to an embodiment includes an electrode assembly having a structure in which a positive electrode and a negative electrode are stacked with a porous separator provided therebetween. The positive electrode contains tungsten and a phosphate compound. The separator contains a material having higher oxidation resistance than a polyethylene and has a pore distribution peak sharpness index of 40 or more in the range of 0.01 ?m to 10 ?m as calculated using formula 1: formula 1: pore distribution peak sharpness index=(peak value of Log differential pore volume)/(difference between maximum pore size and minimum pore size at position corresponding to ½ peak value of Log differential pore volume).

Abstract: A non-aqueous electrolyte secondary battery positive electrode capable of suppressing a decomposition reaction of an electrolyte solution in an overcharged state is provided. A non-aqueous electrolyte secondary battery positive electrode according to this embodiment includes a positive electrode active material layer which includes a positive electrode active material (54) containing a lithium transition metal oxide, a tungsten compound (56), a phosphoric acid compound (58) not in contact with the positive electrode active material (54), and an electrically conductive agent (52) in contact with the tungsten compound (56) and the phosphoric acid compound (58).

Abstract: It is an object to provide a positive electrode for nonaqueous electrolyte secondary batteries in which a decrease in the initial charge capacity is suppressed even when a positive electrode active material exposed to the air is used. The positive electrode for a nonaqueous electrolyte secondary battery contains a lithium transition metal oxide and is formed by mixing the lithium transition metal oxide, tungsten oxide, and a carbonate compound. The tungsten oxide is present on at least a part of a surface of the lithium transition metal oxide, and the mixed carbonate compound is present on a part of a surface of the tungsten oxide.

Abstract: There is provided a positive electrode for nonaqueous electrolyte secondary batteries in which a decrease in the initial charge capacity can be suppressed even when a positive electrode exposed to the air is used. A positive electrode for a nonaqueous electrolyte secondary battery according to an aspect of the present invention contains a lithium transition metal composite oxide represented by general formula Li1+xMnaMbO2+c (in the formula, x, a, b, and c satisfy x+a+b=1, 0<x?0.2, 0.09?a, and ?0.1?c?0.1, and M is at least one element selected from the group consisting of transition metal elements other than Mn, alkali metal elements, alkaline-earth metal elements, group 12 elements, group 13 elements, and group 14 elements) and also contains tungsten oxide and a phosphate compound.

Abstract: An object of the invention is to provide a nonaqueous electrolyte secondary battery having good cycle characteristics. The nonaqueous electrolyte secondary battery of the present invention includes a positive electrode containing a positive electrode active material, a negative electrode containing a negative electrode active material, a separator interposed between the positive electrode and the negative electrode, and a nonaqueous electrolyte. The positive electrode active material is a layered lithium transition metal oxide, and the positive electrode active material has a crystallite size of 140 nm or less. The negative electrode active material contains at least carbon, and the nonaqueous electrolyte contains 2 to 30% by volume of fluoroethylene carbonate.

Abstract: A positive electrode active material capable of improving an output performance of a nonaqueous electrolyte secondary battery is provided. A positive electrode active material of a nonaqueous electrolyte secondary battery 1 contains a first positive electrode active material and a second positive electrode active material. In the first positive electrode active material, the content of cobalt is 15% or more on an atomic percent basis in transition metals. In the second positive electrode active material, the content of cobalt is 5% or less on an atomic percent basis in transition metals. An average secondary particle diameter r1 of the first positive electrode active material is smaller than an average secondary particle diameter r2 of the second positive electrode active material.

Abstract: A positive electrode for nonaqueous electrolyte secondary batteries and a nonaqueous electrolyte secondary battery are provided with which loss of initial efficiency can be limited even if a positive electrode exposed to air is used. An aspect of a positive electrode according to the present invention for nonaqueous electrolyte secondary batteries is a positive electrode for nonaqueous electrolyte secondary batteries incorporating a lithium transition metal oxide, wherein the positive electrode for nonaqueous electrolyte secondary batteries contains a tungsten compound and a boron compound. It is particularly preferred that the tungsten compound be a tungsten-containing oxide.

Abstract: Provided is a positive electrode for nonaqueous electrolyte secondary batteries. The positive electrode allows the batteries to operate with a limited loss of initial efficiency even if the positive electrode has been exposed to air. In an aspect of a positive electrode for nonaqueous electrolyte secondary batteries according to the present invention, the positive electrode for nonaqueous electrolyte secondary batteries contains positive electrode active material particles and a boron compound. The positive electrode active material particles are composed of a lithium transition metal oxide and a rare earth compound adhering to the surface thereof.

Abstract: An aspect of the invention resides in a nonaqueous electrolyte secondary battery (10) including a positive electrode (11), a negative electrode (12) and a nonaqueous electrolytic solution, the positive electrode including a positive electrode active material containing a lithium transition metal oxide having a rare earth compound attached on the surface, the nonaqueous electrolytic solution including an aromatic compound having an oxidative decomposition potential in the range of 4.2 to 5.0 V vs. Li/Li+. The rare earth compound is preferably a rare earth hydroxide, a rare earth oxyhydroxide or a rare earth oxide.

Abstract: The present invention has a main object to improve the thermal stability of a nonaqueous electrolyte secondary battery. A nonaqueous electrolyte secondary battery according to an aspect of the present invention includes a positive electrode, a negative electrode, and a nonaqueous electrolyte. The positive electrode contains a positive electrode active material and a metal fluoride. The positive electrode active material contains particles of a lithium transition metal oxide. At least one portion of the surface of each of the lithium transition metal oxide particles has a rare-earth compound attached thereto. The nonaqueous electrolyte contains a fluorine-containing lithium salt. The rare-earth compound is preferably a hydroxide, an oxyhydroxide, or an oxide.

Abstract: A nonaqueous electrolyte secondary battery of the invention includes a positive electrode, a negative electrode and a nonaqueous electrolyte, the positive electrode including lithium transition metal oxide particles as a positive electrode active material, the lithium transition metal oxide particles containing nickel as a main transition metal component and being such that a first compound containing at least one element Ma selected from the group consisting of Group IV elements and Group V elements is sintered to a portion of the surface of the lithium transition metal oxide particles, the first compound having a composition different from that of the lithium transition metal oxide particles, the positive electrode further including a second compound containing at least one element Mb selected from the group consisting of Group VI elements, the second compound having a composition different from that of the lithium transition metal oxide particles.

Abstract: A positive-electrode active material of a nonaqueous electrolyte secondary battery is modified to improve the output characteristics under various temperature conditions, thereby making the nonaqueous electrolyte secondary battery suitable for a power supply for hybrid vehicles. The nonaqueous electrolyte secondary battery includes a working electrode 11, a counter electrode 12 containing a negative-electrode active material, and a nonaqueous electrolyte solution 14. In the working electrode 11, a positive-electrode mixture layer containing a granular positive-electrode active material and a binder is disposed on both sides of a positive-electrode collector. The positive-electrode active material contains a lithium transition metal oxide Li1.07Ni0.46Co0.19Mn0.28O2 and a tungsten trioxide attached to part of the surface of the lithium transition metal oxide.

Abstract: A positive electrode active material capable of improving an output performance of a nonaqueous electrolyte secondary battery is provided. A positive electrode active material of a nonaqueous electrolyte secondary battery 1 contains a first positive electrode active material and a second positive electrode active material. In the first positive electrode active material, the content of cobalt is 15% or more on an atomic percent basis in transition metals. In the second positive electrode active material, the content of cobalt is 5% or less on an atomic percent basis in transition metals. An average secondary particle diameter r1 of the first positive electrode active material is smaller than an average secondary particle diameter r2 of the second positive electrode active material.

Abstract: The present invention is aimed at providing a nonaqueous electrolyte secondary battery capable of improving cycling characteristics by improving a positive electrode active material when particles with a structure in which primary particles are aggregated to front, secondary particles are used as the positive electrode active material of the nonaqueous electrolyte secondary battery, thereby permitting preferred use as a power supply of a hybrid electric car or the like. The positive electrode active material includes secondary particles 20 composed of aggregated primary particles 21, the primary particles 21 have an aspect ratio of 2.0 or more and 10.0 or less, and in powder X-ray diffraction measurement using CuK? ray, the positive electrode active material satisfies 0.10°?FWHM110 ?0.30° wherein FWHM110 represents a full width at half maximum of a 110 diffraction peak present within a range of diffraction angle 2? of 64.5°±1.0°.

Abstract: In a nonaqueous electrolyte secondary battery including a positive electrode (11) whose surface has a positive electrode mixture layer containing a mixture of a conductive carbon material and a positive electrode active material containing a lithium-containing transition metal composite oxide having a layer structure and represented by the general formula LiaNixM(1-x)O2 (where M represents one or more kinds of elements, and a and x satisfy the conditions 0<a?1.2 and 0.4?x?1, respectively), the proportion of carbon atoms relative to the total atoms on the surface of the positive electrode is made to be not less than 80%.

Abstract: A non-aqueous electrolyte secondary battery is provided that uses as a positive electrode active material a low-cost lithium-containing transition metal composite oxide containing Ni and Mn as its main components, to improve the output power characteristics so that it can be used suitably for an electric power source for, for example, hybrid electric vehicles. A non-aqueous electrolyte secondary battery has a positive electrode (11) containing a positive electrode active material, a negative electrode (12) containing a negative electrode active material, and a non-aqueous electrolyte solution (14) in which a solute is dissolved in a non-aqueous solvent. In the positive electrode active material, Nb2O5 in which the amount of niobium is 0.5 mol % with respect to the total amount of the transition metals and TiO2 in which the amount of titanium is 0.5 mol % with respect to the total amount of the transition metals are disposed on a surface of Li1.06Ni10.56Mn10.38O2.

Abstract: The electrode for the nonaqueous electrolyte secondary battery includes a current collector and an active material layer formed on the current collector and containing an active material. The active material contains first and second particulate lithium-containing transition metal oxides of different voidages.

Abstract: A non-aqueous electrolyte secondary battery having a positive electrode (11) containing a positive electrode active material, a negative electrode (12) containing a negative electrode active material, and a non-aqueous electrolyte solution (14) in which a solute is dissolved in a non-aqueous solvent. The positive electrode active material is obtained by sintering a titanium-containing oxide on a surface of a layered lithium-containing transition metal oxide represented by the general formula Li1+xNiaMnbCocO2+d, where x, a, b, c, and d satisfy the conditions x+a+b+c=1, 0.7?a+b, 0<x?0.1, 0?c/(a+b)<0.35, 0.7?a/b?2.0, and ?0.1?d?0.1.

Abstract: A non-aqueous electrolyte secondary battery using lithium-containing transition metal composite oxide which has a layer structure, contains a lot of Ni and Mn and is inexpensive as a positive electrode active material and attaining high output characteristics even under low temperature environment is provided. The non-aqueous electrolyte secondary battery includes a positive electrode 11 containing a positive electrode active material, a negative electrode 12 containing a negative electrode active material and a non-aqueous electrolyte 14 having lithium ion conductivity, wherein lithium-containing transition metal composite oxide having a layer structure and being represented by a general formula Li1+xNiaMnbCocO2+d wherein x, a, b, c and d satisfy x+a+b+c=1, 0.25?a?0.60, 0.25?b?0.60, 0?c?0.40, 0?x?0.10, 0.7?a/b?2.0 and ?0.1?d?0.