Abstract: A rectangular secondary battery is provided with: a rectangular exterior body having an opening, a bottom part, a first lateral wall, a second lateral wall, a third lateral wall, and a fourth lateral wall; a sealing plate for sealing the opening; and a flat wound electrode body obtained by winding a positive electrode plate and a negative electrode plate with a separator therebetween, wherein a plurality of the flat wound electrode bodies are arranged in the rectangular exterior body. The flat wound electrode bodies each have: a flat region formed at the center, a first bent region having a bent outer surface and being formed on one end side of the flat region; and a second bent region having a bent outer surface and being formed on the other end side of the flat region.

Abstract: Provided is a secondary battery which can be produced with high efficiency. This secondary battery is provided with: a belt-like positive electrode plate having a plurality of positive electrode tabs; a belt-like negative electrode plate having a plurality of negative electrode tabs; a flat wound electrode body obtained by winding the positive electrode plate and the negative electrode plate with a belt-like separator therebetween; and a positive electrode collector (second positive electrode collector) connected to the plurality of positive electrode tabs. The plurality of positive electrode tabs in a state of being laminated are joined to the positive electrode collector (second positive electrode collector). Identification parts are formed on some positive electrode tabs of the plurality of positive electrode tabs.

Abstract: A non-aqueous electrolyte battery is provided that shows good cycle performance and good storage performance under high temperature conditions and exhibits high reliability even with a battery configuration featuring high capacity. A method of manufacturing the battery is also provided.

Abstract: In a non-aqueous electrolyte secondary battery including a positive electrode 1, a negative electrode 2 and a non-aqueous electrolyte, a positive electrode active material wherein a particle of at least one compound selected from Er hydroxide, Er oxyhydroxide, Yb hydroxide, Yb oxyhydroxide, Tb hydroxide, Tb oxyhydroxide, Dy hydroxide, Dy oxyhydroxide, Ho hydroxide, Ho oxyhydroxide, Tm hydroxide, Tm oxyhydroxide, Lu hydroxide, and Lu oxyhydroxide is dispersed and adhered on a surface of a positive electrode active material particle containing Li is used.

Abstract: [Problem] A non-aqueous electrolyte battery is provided that shows good cycle performance and good storage performance under high temperature conditions and exhibits high reliability even with a battery configuration featuring high capacity. A method of manufacturing the battery is also provided.

Abstract: [Problem] A non-aqueous electrolyte battery is provided that shows good cycle performance and good storage performance under high temperature conditions and exhibits high reliability even with a battery configuration featuring high capacity. A method of manufacturing the battery is also provided.

Abstract: A nonaqueous electrolyte secondary battery is prevented from decreasing the remaining capacity and returned capacity at the time of continuous charge at high voltages and high temperatures. The battery has positive and negative electrodes, and a nonaqueous electrolytic solution containing ethylene carbonate and fluoroethylene carbonate as a solvent. The positive electrode contains a positive-electrode active material with the fine particles of a rare earth element compound deposited on its surface in a dispersed state.

Abstract: In a nonaqueous electrolyte secondary battery including a positive electrode, a negative electrode and a nonaqueous electrolytic solution, the nonaqueous electrolytic solution contains a nitrile compound having a chain saturated hydrocarbon group and a nitrile group, the number of carbon atoms in the nitrile compound is four or more, and the positive electrode contains a positive-electrode active material on the surface of which particles of a rare earth element compound are deposited in dispersed form.

Abstract: In a nonaqueous electrolyte secondary battery including a positive electrode, a negative electrode and a nonaqueous electrolytic solution, the nonaqueous electrolytic solution contains a nitrile compound having a chain saturated hydrocarbon group and a nitrile group, the number of carbon atoms in the nitrile compound is four or more, and the positive electrode contains a positive-electrode active material on the surface of which particles of a rare earth element compound are deposited in dispersed form.

Abstract: [Object] To provide a positive electrode for a nonaqueous electrolyte secondary battery with which characteristics of the nonaqueous electrolyte secondary battery, such as a charge/discharge efficiency, a capacity retention ratio, and a discharge capacity retention ratio are not easily degraded even in the case where the nonaqueous electrolyte secondary battery is continuously charged at a high temperature. [Solution] A positive electrode 12 of a nonaqueous electrolyte secondary battery 1 includes a positive electrode active material layer 12b. The positive electrode active material layer 12b contains a positive electrode active material and a compound represented by a general formula (1): MH2PO2 (1). In the general formula (1), M represents a monovalent cation.

Abstract: A nonaqueous electrolyte secondary battery is prevented from decreasing the remaining capacity and returned capacity at the time of continuous charge at high voltages and high temperatures. The battery has positive and negative electrodes, and a nonaqueous electrolytic solution containing ethylene carbonate and fluoroethylene carbonate as a solvent. The positive electrode contains a positive-electrode active material with the fine particles of a rare earth element compound deposited on its surface in a dispersed state.

Abstract: A nonaqueous electrolyte secondary battery is prevented from decreasing the remaining capacity and returned capacity at the time of continuous charge at high voltages and high temperatures. The battery has positive and negative electrodes, and a nonaqueous electrolytic solution containing ethylene carbonate and fluoroethylene carbonate as a solvent. The positive electrode contains a positive-electrode active material with the fine particles of a rare earth element compound deposited on its surface in a dispersed state.

Abstract: A positive electrode active material with least part of a surface coated with a surface treatment layer composed of a phosphate compound. The phosphate compound contains at least one element selected from the group consisting of neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, and lutetium.

Abstract: In a nonaqueous electrolyte secondary battery using SiOx (0<x<2) as a negative electrode active material, cycle characteristics are improved. There is provided a nonaqueous electrolyte secondary battery including a negative electrode active material which contains a substance represented by SiOx (0<x<2). In this nonaqueous electrolyte secondary battery, when the value of x in the above general formula is represented by xs at a surface of the substance and is represented by xb at a central portion thereof, xb<xs holds, and when a depth of the substance from the topmost surface thereof at which x=(xs+xb)/2 holds is represented by za (?m), and when the average particle diameter of the substance is represented by R (?m), 0.05<za and 0.025?za/R?0.4 hold.

Abstract: In nonaqueous electrolyte secondary batteries that use silicon or silicon oxide as a negative electrode active material, the initial charge-discharge efficiency and the cycle characteristics are improved. A negative electrode active material particle (13a) is a particulate negative electrode active material used for nonaqueous electrolyte secondary batteries, and includes a base particle (14) composed of silicon or silicon oxide and a conductive coating layer (15) that coats at least part of a surface of the base particle (14). A pore (16) is formed in the particle. The pore (16) preferably includes an interfacial pore (16z) formed between the base particle (14) and the coating layer (15).

Abstract: In nonaqueous electrolyte secondary batteries that use silicon oxide as a negative electrode active material, the cycle characteristics are improved. A negative electrode active material (13a) includes a base particle (14) composed of silicon oxide and a coating layer (15) that is composed of a conductive carbon material and coats at least part of a surface of the base particle (14). Assuming that a maximum peak intensity at 600 cm?1 to 1400 cm?1 in an infrared absorption spectrum obtained by infrared spectroscopic measurement is 1, an intensity at 900 cm?1 is 0.30 or more, and a full width at half maximum of a peak near 1360 cm?1 in a Raman spectrum obtained by Raman spectroscopic measurement is 100 cm?1 or more.

Abstract: [Problem] A non-aqueous electrolyte battery is provided that shows good cycle performance and good storage performance under high temperature conditions and exhibits high reliability even with a battery configuration featuring high capacity. A method of manufacturing the battery is also provided.

Abstract: In a non-aqueous electrolyte secondary battery using SiOX as a negative electrode active material, it is an object to improve initial charge-discharge efficiency and cycle properties. Provided is a negative electrode active material containing particles made of SiOX containing a lithium silicate phase, 50% to 100% of the surface of each particle made of SiOX being covered by carbon. The proportion of the number of moles of the lithium silicate phase to the number of moles of the particles made of SiOX is 0.5 mole percent to 25 mole percent. The average primary particle size of the particles made of SiOX is 1 ?m to 15 ?m.

Abstract: The present invention provides a nonaqueous electrolyte secondary battery which can significantly improve battery characteristics by suppression of decrease in discharge capacity at an initial cycle stage and by improvement in high-temperature charge storage characteristics. A negative electrode for a nonaqueous electrolyte secondary battery has a negative electrode mixture layer including a negative electrode active material which contains SiOx (0.8?x?1.2) and graphite; and a negative electrode collector having at least one surface on which the negative electrode mixture layer is formed, and on the surface of the SiOx, a coating film derived from a compound having an isocyanate group is formed.

Abstract: [Problem] A non-aqueous electrolyte battery is provided that shows good cycle performance and good storage performance under high temperature conditions and exhibits high reliability even with a battery configuration featuring high capacity. A method of manufacturing the battery is also provided.