Abstract: A non-aqueous electrolyte secondary battery according to one embodiment of the present disclosure is provided with a positive electrode, a negative electrode, and a non-aqueous electrolyte, wherein the positive electrode includes a positive electrode active material containing a composite oxide particle that includes Ni, Co and Li, and also includes at least one among Mn and Al, and the ratio of Ni to the total number of moles of metal elements excluding Li is 50 mol % or more. In the composite oxide particle, the ratio (A/B) of a BET specific surface area (A) to a theoretical specific surface area (B) determined by the following formula is more than 1.0 and less than 3.3. Theoretical specific surface area (B) (m2/g)=6/(true density (g/cm3)×volume average particle diameter (?m)).

Abstract: In this non-aqueous electrolyte secondary battery, a positive electrode includes a lithium transition metal composite oxide that contains Ni at 85 mol % with respect to the total number of moles of metal elements excluding Li, and a negative electrode includes graphite particles having an internal porosity of 1-5%. The N/P ratio is 1.00-1.05, where P is the charging capacity of the positive electrode, and N is the charging capacity of the negative electrode.

Abstract: This positive electrode for a nonaqueous electrolyte secondary battery is provided with: a positive electrode active material including lithium composite oxide particles containing not less than 80 mol % but less than 100 mol % of Ni with respect to the total number of moles of metal elements other than Li; and a conductive material, wherein the lithium composite oxide particles include particles each having a step-like structure with three or more stacked flat surfaces having an outer edge length of 1 ?m or more, and the average particle size of the conductive material is 30 nm or less.

Abstract: A nonaqueous electrolyte secondary battery according to an embodiment of the present disclosure comprises a positive electrode, a negative electrode, and a nonaqueous electrolyte. The positive electrode has: a positive electrode current collector; and a positive electrode active material layer that is provided to the surface of the positive electrode current collector and includes a positive electrode active material and a positive electrode additive. The positive electrode active material contains a lithium-nickel composite oxide having a compressive breaking strength of at least 130 MPa and including at least 50 mol % of nickel relative to the total quantity of metals other than lithium. The positive electrode additive contains a lithium-containing metal oxide that has an antifluorite structure.

Abstract: A nonaqueous electrolyte secondary battery (10) according to one embodiment of the present disclosure is provided with: an electrode body (14) which is obtained by winding a positive electrode (30) and a negative electrode (40), with a separator (50) being interposed therebetween; a nonaqueous electrolyte; and a battery case (15) which is formed of a metal and contains the electrode body (14) and the nonaqueous electrolyte. The negative electrode (40) comprises a negative electrode collector (41) and a negative electrode active material layer (42) that contains graphite particles as a negative electrode active material; the outer circumferential surface of the electrode body (14) is provided with an exposure part (43) from which the negative electrode collector (41) is exposed so as to be in contact with the inner circumferential surface of the battery case (15); and the graphite particles have a compressive strength of 15 MPa or more.

Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode including a positive electrode mix layer, a negative electrode including a negative electrode mix layer, and a nonaqueous electrolyte containing a nonaqueous solvent. A surface of the negative electrode mix layer is provided with grooves. The nonaqueous electrolyte contains 10 volume percent or more of a fluorinated solvent with respect to the volume of the nonaqueous solvent and has a viscosity (25° C.) of 3.50 mPa·s or more as measured with a differential pressure viscometer.

Abstract: A non-aqueous electrolyte secondary battery according to one embodiment of the present disclosure is provided with a positive electrode, a negative electrode, and a non-aqueous electrolyte, wherein the positive electrode includes a positive electrode active material containing a composite oxide particle that includes Ni, Co and Li, and also includes at least one among Mn and Al, and the ratio of Ni to the total number of moles of metal elements excluding Li is 50 mol % or more. In the composite oxide particle, the ratio (A/B) of a BET specific surface area (A) to a theoretical specific surface area (B) determined by the following formula is more than 1.0 and less than 3.3. Theoretical specific surface area (B) (m2/g)=6/(true density (g/cm3)×volume average particle diameter (?m)).

Abstract: This nonaqueous electrolyte secondary battery is provided with a positive electrode, a negative electrode and a nonaqueous electrolyte. The nonaqueous electrolyte comprises a nonaqueous solvent that contains a fluorine-containing cyclic carbonate; the positive electrode comprises a positive electrode active material that contains composite oxide particles which contain Ni, Co and Li, while containing at least one of Mn and Al, and wherein the proportion of Ni relative to the total number of moles of the metal elements excluding Li is 50% by mole or more; and the composite oxide particles are in a non-aggregated state, while having a compressive strength of 250 MPa or more.

Abstract: A nonaqueous electrolyte secondary battery has both high capacity and high regeneration. A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a nonaqueous electrolyte. The positive electrode contains a Ni-containing lithium transition metal oxide having a layered structure and also contains a tungsten compound and/or a molybdenum compound. The percentage of Ni is greater than 90 mole percent with respect to the molar amount of the lithium transition metal oxide. The amount of the compound is 0.1 mole percent to 1.5 mole percent with respect to the molar amount of the lithium transition metal oxide in terms of tungsten element and/or molybdenum element.

Abstract: This non-aqueous electrolyte secondary battery has an electrode body comprising a positive electrode and a negative electrode which are wound around while sandwiching a separator therebetween, and housed in a cylindrical housing member. The positive electrode has a positive electrode collector and a positive electrode active substance layer extending above the positive electrode collector. The negative electrode has a negative electrode collector, a negative electrode active substance layer extending above the negative electrode collector, and a negative electrode lead connected to the negative electrode collector. The negative electrode lead is disposed more toward the wound core of the electrode body than the end portion of the negative electrode active substance layer and the end portion of the positive electrode active substance layer.

Abstract: The invention provides nonaqueous electrolyte secondary batteries having excellent output characteristics during large-current charging and discharging. A nonaqueous electrolyte secondary battery according to one aspect of the invention includes a positive electrode including a lithium transition metal oxide, a negative electrode including a negative electrode active material capable of storing and releasing lithium ions, and a nonaqueous electrolyte, the negative electrode active material including a carbon material as a main component, the negative electrode including a tungsten compound and/or a molybdenum compound. The tungsten compound and/or the molybdenum compound is preferably attached to the surface of the carbon material.

Abstract: This non-aqueous electrolyte secondary battery is equipped with a positive electrode comprising: a positive electrode active substance containing a lithium-containing transition metal oxide; and a lithium compound derived from an irreversible substance irreversibly reacting with lithium at a voltage lower than the average operating voltage of the positive electrode active substance.

Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode including a positive electrode mix layer, a negative electrode including a negative electrode mix layer, and a nonaqueous electrolyte containing a nonaqueous solvent. A surface of the negative electrode mix layer is provided with grooves. The nonaqueous electrolyte contains 10 volume percent or more of a fluorinated solvent with respect to the volume of the nonaqueous solvent and has a viscosity (25° C.) of 3.50 mPa·s or more as measured with a differential pressure viscometer.

Abstract: A non-aqueous electrolyte secondary battery having high input/output characteristics and preferable cycle characteristics is provided. A non-aqueous electrolyte according to one example of an embodiment includes a positive electrode which includes a positive electrode active material containing as a primary component, a lithium transition metal oxide having a layered structure, the content of Co of which is with respect to the total mass of metal elements except Li is 1 to 20 percent by mole; a negative electrode which includes a negative electrode active material containing Si; and a non-aqueous electrolyte which includes a fluorinated chain carboxylic acid ester.

Abstract: An object is to provide a positive electrode for a non-aqueous electrolyte secondary battery and a non-aqueous electrolyte secondary battery that allow a high output characteristic. Included are a positive electrode collector and a positive electrode mixture layer formed on at least one surface of the positive electrode collector. The positive electrode mixture layer contains particles 3 of lithium nickel cobalt manganese oxide represented by LiNi0.55Co0.2OMn0.25O2, erbium oxyhydroxide 1 fixed on the surfaces of the particles of the lithium nickel cobalt manganese oxide 3, tungsten trioxide 2 adhering to the surfaces of the particles of the lithium nickel cobalt manganese oxide 3, and a binder.

Abstract: Provided is a nonaqueous electrolyte secondary battery with improved high-rate discharge characteristics. The nonaqueous electrolyte secondary battery includes a positive electrode including a metal foil and a positive electrode active material layer formed thereon; a negative electrode containing a negative electrode active material; and a nonaqueous electrolyte containing a nonaqueous solvent and a solute dissolved therein. The metal foil of the positive electrode is an aluminum foil having an at least partially roughened surface adjacent to the positive electrode active material layer. The positive electrode includes a conductive layer containing a conductor and a binder in recesses in the at least partially roughened surface of the aluminum foil. The positive electrode active material layer is disposed on the conductive layer and contains a positive electrode active material, the conductor, and the binder.

Abstract: A nonaqueous electrolyte secondary battery has both high capacity and high regeneration. A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a nonaqueous electrolyte. The positive electrode contains a Ni-containing lithium transition metal oxide having a layered structure and also contains a tungsten compound and/or a molybdenum compound. The percentage of Ni is greater than 90 mole percent with respect to the molar amount of the lithium transition metal oxide. The amount of the compound is 0.1 mole percent to 1.5 mole percent with respect to the molar amount of the lithium transition metal oxide in terms of tungsten element and/or molybdenum element.

Abstract: The invention provides nonaqueous electrolyte secondary batteries having excellent output characteristics during large-current charging and discharging. A nonaqueous electrolyte secondary battery according to one aspect of the invention includes a positive electrode including a lithium transition metal oxide, a negative electrode including a negative electrode active material capable of storing and releasing lithium ions, and a nonaqueous electrolyte, the negative electrode active material including a carbon material as a main component, the negative electrode including a tungsten compound and/or a molybdenum compound. The tungsten compound and/or the molybdenum compound is preferably attached to the surface of the carbon material.

Abstract: Provided are a positive electrode active material, capable of achieving both high capacity and high output, for nonaqueous electrolyte secondary batteries and a nonaqueous electrolyte secondary battery using the same. A positive electrode active material for nonaqueous electrolyte secondary batteries according to the present invention contains a lithium transition metal oxide which has a layered structure and which contains Ni as a transition metal. The percentage of Ni element with respect to the total molar amount of metal elements, other than lithium, in the lithium transition metal oxide is 89 mole percent or more. A zirconium compound is present on the surface of the lithium transition metal oxide.

Abstract: A high-capacity non-aqueous electrolyte secondary battery capable of maintaining good cycle characteristics even in the case where large current discharge is repeated is provided. A positive electrode active material particle (32) includes a base particle (33) produced by agglomeration of primary particles (33a) made from lithium transition metal oxide containing tungsten and a rare earth compound particles (34) attached to the surface of the base particle (33). Preferably, the rare earth compound is attached to the interface at which the primary particles are in contact with each other or the vicinity of the interface.