Abstract: A negative electrode for nonaqueous electrolyte secondary batteries including a negative electrode current collector and a negative electrode mixture layer placed on the negative electrode current collector. The negative electrode mixture layer is a layer of a mixture of a negative electrode active material, a binding agent, and a conductive agent. The binding agent includes a binding agent A made of a rubber polymeric compound and a binding agent B made of a water-soluble polymeric compound. In the case where a through-thickness cross section of the negative electrode mixture layer is halved into a current collector-side region and a surface-side region, the amount of the binding agent A in the current collector-side region is larger than the amount of the binding agent A in the surface-side region and the amount of the conductive agent in the current collector-side region is larger than the amount of the conductive agent in the surface-side region.

Abstract: In a nonaqueous electrolyte secondary battery, a positive electrode mixture layer of a positive electrode contains a lithium transition metal oxide containing at least nickel (Ni), cobalt (Co), manganese (Mn), and tungsten (W). A negative electrode mixture layer of a negative electrode contains lithium titanate and a group-5 group-6oxide that is an oxide containing at least one selected from a group consisting of group 5 elements and group 6 elements.

Abstract: In a nonaqueous electrolyte secondary battery, a positive electrode contains a lithium transition metal oxide and a phosphoric acid compound. A nonaqueous electrolyte contains a dinitrile represented by a general formula: NC-A-CN (A represents a linear hydrocarbon having 1 to 10 carbon atoms or a hydrocarbon which contains a main chain having 1 to 10 carbon atoms and at least one side chain having 3 or less carbon atoms); an ether represented by a general formula: R1—O—R2—O—R3 (R1 and R3 each represent a group which contains a main chain having 1 to 3 carbon atoms, and R2 represents a chain hydrocarbon group having 1 to 3 carbon atoms); and a fluorophosphate salt.

Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a nonaqueous electrolyte. The positive electrode contains a lithium transition metal oxide, at least one element of a group 5 element and group 6 element in the periodic table, and a phosphoric acid compound. The nonaqueous electrolyte contains a lithium salt containing a P—O bond and a P—F bond.

Abstract: The present invention provides a nonaqueous electrolyte secondary battery capable of suppressing the increase in IV resistance of a battery in a combination of a negative electrode containing a lithium-titanium composite oxide and a carbon material and a positive electrode containing a lithium transition metal oxide. A nonaqueous electrolyte secondary battery according to the present invention includes a positive electrode, a negative electrode, a separator placed between the positive electrode and the negative electrode, and a nonaqueous electrolyte. The positive electrode contains a lithium transition metal oxide in which Ni accounts for 30 mole percent or more of the total molar amount of metal elements excluding Li and also contains tungsten element. The negative electrode contains a lithium-titanium composite oxide and a carbon material. The nonaqueous electrolyte contains a substance reduced on the negative electrode at a potential of 0.5 V to 1.5 V (vs. Li/Li+).

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: A non-aqueous electrolyte secondary battery includes a non-aqueous electrolyte and an electrode body in which a positive electrode plate and a negative electrode plate are layered with a separator interposed therebetween. The positive electrode plate contains a phosphate compound. The negative electrode plate contains a graphite-based material, an amorphous/non-crystalline carbon material, and a rubber-based binder. The ratio of the coverage of the rubber-based binder on the amorphous/non-crystalline carbon material to the coverage of the rubber-based binder on the graphite-based material is more than 0 and 0.5 or less.

Abstract: The present invention aims to provide a non-aqueous electrolyte secondary battery in which the amount of a gas generated during charge/discharge cycles, during storage, or the like is small although a cellulose-made separator is used. A non-aqueous electrolyte secondary battery which is one example of an embodiment includes a positive electrode including a positive electrode collector and a positive electrode mixture layer formed thereon; a negative electrode including a negative electrode collector and a negative electrode mixture layer formed thereon; a separator formed from a cellulose as a primary component; and a fluorine-containing non-aqueous electrolyte. In the positive electrode mixture layer, a lithium transition metal oxide and a phosphoric acid compound are contained.

Abstract: The present invention aims to suppress gas generation during charge/discharge cycles, storage, and the like when a group IV to VI oxide, such as a lithium titanate, is used as a negative electrode active material. A non-aqueous electrolyte secondary battery includes a positive electrode having a positive electrode collector and a positive electrode mixture layer formed thereon, a negative electrode having a negative electrode collector and a negative electrode mixture layer formed thereon, and a fluorine-containing non-aqueous electrolyte. In the positive electrode mixture layer, a lithium transition metal oxide and a phosphoric acid compound are contained. In the negative electrode mixture layer, a group IV to VI oxide is contained which contains at least one type of element selected from a group IV element, a group V element, and a group VI element of the periodic table and which has a BET specific surface area of 2.0 m2/g or more.

Abstract: A nonaqueous electrolyte secondary battery comprising a negative electrode plate including a negative electrode collector and a negative electrode mix layer which is placed on the negative electrode collector and which contains a negative electrode active material, a binder A containing a rubber polymer compound as a binder, and a binder B containing a water-soluble polymer compound. The negative electrode mix layer has a cross section in a thickness direction thereof, the cross section being halved into a collector-side region and a surface-side region. The sum of the perimeters of the negative electrode active material per unit area in the cross section is more distributed in the collector-side region than in the surface-side region. The binder A is more distributed in the collector-side region than in the surface-side region.

Abstract: Nonaqueous electrolyte secondary batteries are provided which are resistant to a decrease in capacity associated with charge and discharge cycles and have excellent discharge rate characteristics. A nonaqueous electrolyte secondary battery according to an example embodiment includes a positive electrode including a lithium transition metal oxide, a negative electrode and a nonaqueous electrolyte. The lithium transition metal oxide has a content of voids within particles of 0.2 to 30% before first charging. The nonaqueous electrolyte includes a fluorinated cyclic carbonate and a fluorinated chain carboxylate ester.

Abstract: There is provided a battery pack capable of supplying a stable output and of being charged stably in a low temperature environment (for instance, 0° C. or lower). A battery pack (1) includes: a battery group (11) having a first battery (10A) and a second battery (10B) disposed around the first battery (10A); and a heater (14) that is disposed on an outer peripheral side of the battery group (11), famed by the second battery (10B), and that generates heat by being energized by the first battery (10A). The first battery (10A) is allowed to be charged and discharged with a higher current than a current of the second battery (10B) in a temperature range lower than or equal to a predetermined temperature.

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 in which the generation of gas is suppressed in charge/discharge cycles. The nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, a separator placed therebetween, and a nonaqueous electrolyte. The positive electrode includes a positive electrode active material containing a lithium transition metal oxide. The positive electrode contains tungsten oxide. Tungsten is present in the form of a solid solution in the lithium transition metal oxide. Tungsten oxide is attached to the surface of the lithium transition metal oxide. The separator contains cellulose. Tungsten in tungsten oxide contained in the positive electrode is preferably 0.01 mole percent to 3.0 mole percent with respect to transition metals, excluding lithium, in the lithium transition metal oxide.

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 negative electrode for nonaqueous electrolyte secondary batteries which suppresses generation of gas and increases power characteristics, including a negative electrode current collector and a negative electrode mixture layer placed on the negative electrode current collector. The negative electrode mixture layer is a mixture of a negative electrode active material, a binding agent, and a conductive agent. The negative electrode active material contains silicon. The binding agent includes a binding agent A made of a rubber polymeric compound. A through-thickness cross section of the negative electrode mixture layer halved into a current collector-side region and a surface-side region, has the amount of the binding agent A in the current collector-side region larger than the amount of the binding agent A in the surface-side region and the amount of the conductive agent in the surface-side region is larger than the amount of the conductive agent in the current collector-side region.

Abstract: A negative electrode for nonaqueous electrolyte secondary batteries including a negative electrode current collector and a negative electrode mixture layer placed on the negative electrode current collector. The negative electrode mixture layer is a layer of a mixture of a negative electrode active material, a binding agent, and a conductive agent. The binding agent includes a binding agent A made of a rubber polymeric compound and a binding agent B made of a water-soluble polymeric compound. In the case where a through-thickness cross section of the negative electrode mixture layer is halved into a current collector-side region and a surface-side region, the amount of the binding agent A in the current collector-side region is larger than the amount of the binding agent A in the surface-side region and the amount of the conductive agent in the current collector-side region is larger than the amount of the conductive agent in the surface-side region.

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: The nonaqueous electrolyte secondary battery includes: a positive electrode containing a positive-electrode active material; a negative electrode; and a nonaqueous electrolyte. The positive-electrode active material contains a lithium-containing oxide obtained by ion-exchanging part of sodium in a cobalt-containing oxide containing lithium, sodium, and titanium with lithium.

Abstract: A nonaqueous electrolyte secondary battery comprising a negative electrode plate including a negative electrode collector and a negative electrode mix layer which is placed on the negative electrode collector and which contains a negative electrode active material, a binder A containing a rubber polymer compound as a binder, and a binder B containing a water-soluble polymer compound. The negative electrode mix layer has a cross section in a thickness direction thereof, the cross section being halved into a collector-side region and a surface-side region. The sum of the perimeters of the negative electrode active material per unit area in the cross section is more distributed in the collector-side region than in the surface-side region. The binder A is more distributed in the collector-side region than in the surface-side region.