Abstract: There is provided a nonaqueous electrolyte battery including a first electrode having a strip shape, a second electrode having a strip shape, a first electrode lead, a second electrode lead, a separator having a strip shape that is disposed between the first electrode and the second electrode, and a nonaqueous electrolyte. A laminated electrode body, which is obtained by laminating the first electrode and the second electrode through the separator in such a manner that the second electrode lead is disposed at the other end portion of the second electrode not opposite to one end portion of the first electrode to which the first electrode lead is connected, is wound in a longitudinal direction with one end to which the first electrode lead is connected made as an initial end, and a wound electrode body is obtained.

Abstract: Anode active materials, anodes, and batteries are provided. In one embodiment, an anode active material includes particles consisting essentially of a material selected from the group consisting of silicon and an alloy of silicon. An average degree of circularity of the particles is 90% or less.

Abstract: A current collector including a first principal plane and a second principal plane with a roughness of a first principal plane and a roughness of a second principal plane being mutually different.

Abstract: A current collector including a first principal plane and a second principal plane with a roughness of a first principal plane and a roughness of a second principal plane being mutually different.

Abstract: A current collector including a first principal plane and a second principal plane. In the current collector, the roughness of the first principal plane and second principal plane being mutually different.

Abstract: A secondary battery capable of improving the cycle characteristics is provided. The secondary battery includes a cathode, an anode, and an electrolytic solution. The electrolytic solution is impregnated in a separator provided between the cathode and the anode. The anode has an anode structure on an anode current collector. The anode structure has a structure in which a plurality of anode active material particles having silicon are held by a plurality of metal fibers forming a three-dimensional network structure. Due to the plurality of metal fibers, sufficient conductive paths are obtained among the plurality of anode active material particles. Thus, compared to a general anode in which an active material layer is provided on a current collector made of a metal foil or the like, the current collectivity is improved.

Abstract: Provided are an anode capable of preventing an increase in impedance and variations in characteristics and a battery using the anode. An anode active material layer includes at least one kind selected from the group consisting of simple substances, alloys and compounds of silicon and the like capable of forming an alloy with Li. The anode active material layer is formed by a vapor-phase deposition method or the like, and is alloyed with an anode current collector. A coating including lithium carbonate is formed on at least a part of a surface of the anode current collector. Thereby, an increase in impedance can be prevented. Moreover, the anode is less subject to an influence by a difference in a handling environment or storage conditions, so variations in impedance can be prevented.

Abstract: A current collector including a first principal plane and a second principal plane. In the current collector, the roughness of the first principal plane and second principal plane being mutually different.

Abstract: A current collector includes a first principal plane and a second principal plane. In the current collector, the roughness of the first principal plane and second principal plane being mutually different.

Abstract: The invention provides an anode capable of improving battery characteristics such as cycle characteristics and a battery using it. An anode current collector is provided with an anode active material layer. The anode active material layer contains at least one from the group consisting of simple substances, alloys, and compounds of silicon or the like capable of forming an alloy with Li. Further, the anode active material layer is formed by vapor-phase deposition method or the like, and is alloyed with the anode current collector. Further, Li of from 0.5% to 40% of an anode capacity is previously inserted in the anode active material layer. Therefore, when Li is consumed due to reaction with an electrolyte or the like, Li can be refilled, and potential raise of the anode can be inhibited in the final stage of discharge.

Abstract: An anode, an anode current collector, an anode active material and a battery using the anode are provided. The anode includes the anode current collector and the anode active material. The anode current collector has a projection. The anode active material layer is formed via at least one of a vapor deposition method, a liquid-phase deposition method, a sintering method and the like.

Abstract: An anode, an anode current collector, an anode active material and a battery using the anode are provided. The anode includes the anode current collector and the anode active material. The anode current collector has a projection. The anode active material layer is formed via at least one of a vapor deposition method, a liquid-phase deposition method, a sintering method and the like.

Abstract: Anode active materials, anodes, and batteries are provided. In one embodiment, an anode active material includes particles consisting essentially of a material selected from the group consisting of silicon and an alloy of silicon. An average degree of circularity of the particles is 90% or less.

Abstract: An anode active material capable of preventing shape deformation due to expansion and shrinkage and a battery using the anode are provided. An anode active material layer contains a powdery anode active material containing Si or Sn as an element. The average degree of circularity of the anode active material is 0.90 or less. By decreasing the average degree of circularity, the surface area becomes wide, and the reactive region becomes large. As a result, an intense local reaction is prevented, and the number of cracks resulting from expansion and shrinkage are reduced.

Abstract: A battery with more superior reliability is provided. The battery includes: a battery element in which a cathode having a cathode active material layer on a strip-shaped cathode current collector and an anode having an anode active material layer on a strip-shaped anode current collector are layered with a separator in between, wherein the anode active material layer is provided to occupy a first region that is overlapped with a cathode active material layer formation region in which the cathode active material layer is provided on the cathode current collector and a peripheral region thereof in the anode, and out of a second region adjacent to the first region in the longitudinal direction in the anode, a width of a third region in which the anode active material layer is not formed and the anode current collector is exposed is smaller than a width of the first region.

Abstract: A secondary battery includes: a cathode and an anode that are opposed to each other with a separator in between; and an electrolytic solution, wherein the cathode includes a cathode current collector and a cathode active material layer provided between the cathode current collector and the separator, the anode includes an anode current collector and an anode active material layer provided between the anode current collector and the separator, one or more of the cathode, the anode, and the separator includes a plurality of thermally-conductive particles in a region between the cathode current collector and the anode current collector, and heat conductivity of the thermally-conductive particles is larger in a second direction that intersects with a first direction, in which the cathode and the anode are opposed to each other, than in the first direction.

Abstract: There is provided a battery including a positive electrode, a negative electrode, and an electrolyte. The positive electrode includes a positive electrode active material layer, on at least one surface of a positive electrode current collector, including a binder and a positive electrode active material of a deoxidized lithium transition metal composite oxide. The positive electrode active material layer shows first and second peaks of oxygen amounts generated from a type of the positive electrode active material in the positive electrode active material layer when the positive electrode active material layer is heated in a charge state of higher than or equal to 4.2 V and lower than or equal to 4.5 V in a lithium antipode potential, the second peak appearing in a temperature region higher than a temperature region of the first peak. At least the second peak appears in a temperature region higher than 220° C.

Abstract: Provided is a battery capable of obtaining superior cycle characteristics. The battery comprises a cylindrical type spirally wound body including a spirally wound laminate of a cathode and an anode with a separator in which an electrolyte solution is impregnated. The anode includes an anode current collector, an outer anode active material layer disposed on an outer winding surface of the anode current collector and an inner anode active material layer disposed on an inner winding surface of the anode current collector. The outer anode active material layer and the inner anode active material layer include Si, Sn or a compound thereof. The capacity ratio between the outer anode active material layer and the inner anode active material layer in at least one region is within a range of 0.6 to 0.8 inclusive.

Abstract: There is provided a nonaqueous electrolyte battery including a first electrode having a strip shape, a second electrode having a strip shape, a first electrode lead, a second electrode lead, a separator having a strip shape that is disposed between the first electrode and the second electrode, and a nonaqueous electrolyte. A laminated electrode body, which is obtained by laminating the first electrode and the second electrode through the separator in such a manner that the second electrode lead is disposed at the other end portion of the second electrode not opposite to one end portion of the first electrode to which the first electrode lead is connected, is wound in a longitudinal direction with one end to which the first electrode lead is connected made as an initial end, and a wound electrode body is obtained.

Abstract: A battery with more superior reliability is provided. The battery includes: a battery element in which a cathode having a cathode active material layer on a strip-shaped cathode current collector and an anode having an anode active material layer on a strip-shaped anode current collector are layered with a separator in between, wherein the anode active material layer is provided to occupy a first region that is overlapped with a cathode active material layer formation region in which the cathode active material layer is provided on the cathode current collector and a peripheral region thereof in the anode, and out of a second region adjacent to the first region in the longitudinal direction in the anode, a width of a third region in which the anode active material layer is not formed and the anode current collector is exposed is smaller than a width of the first region.