Abstract: An anode capable of relaxing the stress due to expansion and shrinkage and a battery using the anode are provided. In the anode, an anode active material layer containing at least one of silicon and tin as an element is provided on both faces of a strip-shaped anode current collector. In the anode current collector and the anode active material layer, at least one penetrating portion that is cut out or slit to penetrate the anode current collector and the anode active material layer is formed to extend to include a longitudinal component of the anode current collector.

Abstract: A battery capable of improving the cycle characteristics is provided. A current collector containing copper (Cu), in which ratio I (200)/I (111) between intensity I (200) of a peak originated in (200) crystal plane of copper obtained by X-ray diffraction and intensity I (111) of a peak originated in (111) crystal plane thereof is in the range from 0.5 to 1.5.

Abstract: A battery realizing the superior cycle characteristics is provided. An electrode includes a current collector including an active-material-layer-formation region and a flat and smooth region having a surface roughness smaller than that of the active-material-layer-formation region, and an active material layer provided in the active-material-layer-formation region of the current collector. An electrode lead is connected to the flat and smooth 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: A secondary battery includes: a cathode; an anode; and an electrolytic solution, wherein the anode includes an anode active material layer, the anode active material layer being provided on part of an anode current collector, and a breaking elongation ?2 (percent) of the anode current collector in a second region is larger than a breaking elongation ?1 (percent) of the anode current collector in a first region, the second region not being provided with the anode active material layer, and the first region being provided with the anode active material layer.

Abstract: A rechargeable battery including a cathode and an anode each capable of inserting and extracting an electrode reaction material, and including an electrolyte, in which the anode includes an anode current collector which is formed by including a current collector body. The anode current collector is provided thereon with an active anode material layer, and a plurality of conductive particles disposed on the surface of the current collector body with the surface facing the active anode material layer. The plurality of conductive particles is formed to include spherical particles and plate-like particles. Since a tridimensional structure having irregularities is formed on the surface of the current collector body with the spherical particles and plate-like particles, anchoring effects are greatly increased. As a result, the adhesion of the active anode material layer to the anode current collector is considerably improved.

Abstract: A secondary battery having high cycle characteristics is provided. The secondary battery includes a cathode, an anode, and an electrolyte. In the anode, an anode active material layer containing silicon, carbon, and oxygen as an anode active material is provided on an anode current collector. In the anode active material, a content of carbon is from 0.2 atomic % to 10 atomic % both inclusive, and a content of oxygen is from 0.5 atomic % to 40 atomic % both inclusive. A ratio from 0.1% to 17.29% both inclusive of the silicon contained in the anode active material exists as Si—C bond.

Abstract: A secondary battery that has superior safety and is able to provide more favorable cycle characteristics is provided. A laminated body in which a cathode and an anode are layered with a separator impregnated with an electrolytic solution in between is contained in a package can and a package cup. In the anode, an anode active material layer containing an anode active material such as silicon is provided on an anode current collector in which projection sections are formed on a base material. The base material contains carbon and sulfur respectively having a content ratio of 100 ppm or less, and contains crystallites having an average diameter of from 0.01 ?m to 5 ?m both inclusive.

Abstract: A battery capable of improving cycle characteristics and a manufacturing yield is provided. An anode includes: an anode current collector; and an anode active material layer arranged on the anode current collector, in which the anode active material layer includes an anode active material including a plurality of pores, and the rate of change in the amount of mercury intruded into the plurality of pores is distributed so as to have a peak in a diameter range from 80 nm to 1200 nm both inclusive, the amount of mercury intruded being measured by mercury porosimetry.

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: An anode capable of relaxing the stress concentration and improving the characteristics and a battery using it are provided. The anode includes an anode current collector and an anode active material layer containing silicon (Si) as an element, wherein the anode active material layer has a metal element increasing and decreasing region in which a metal element is contained as an element, and a concentration of the metal element is increased and then decreased in a thickness direction.

Abstract: A current collector forming an electrode for battery. The electrode current collector is made of copper or a copper alloy, and has a front surface color and a back surface color, at least one color of which is a color belonging to a color space represented by: 50?L*?80, 5?a*<60, 5?b*<60, where L*, a*, and b* are numeric values determined based on the L*a*b* calorimetric system described in JIS Z 8729.

Abstract: A lithium-ion secondary battery allowed to improve cycle characteristics and initial charge-discharge characteristics is provided. The lithium-ion secondary battery includes a cathode; an anode; and an electrolytic solution. The anode includes an anode active material layer including a plurality of anode active material particles. The anode active material particles each include a core section and a coating section applied to a part or a whole of a surface of the core section, and the core section includes a silicon-based material (SiOx: 0?x<0.5) and the coating section includes an amorphous or low-crystalline silicon-based material (SiOy: 0.5?y?1.8).

Abstract: An anode capable of relaxing the stress concentration and improving the characteristics and a battery using it are provided. The anode includes an anode current collector and an anode active material layer containing silicon (Si) as an element, wherein the anode active material layer has a metal element increasing and decreasing region in which a metal element is contained as an element, and a concentration of the metal element is increased and then decreased in a thickness direction.

Abstract: An anode capable of relaxing the stress concentration and improving the characteristics and a battery using it are provided. The anode includes an anode current collector and an anode active material layer containing silicon (Si) as an element, wherein an anode active material layer has a metal element increasing and decreasing region in which a metal element is contained as an element, and a concentration of the metal element is increased and then decreased in a thickness direction.

Abstract: A rechargeable battery including a cathode and an anode each capable of inserting and extracting an electrode reaction material, and including an electrolyte, in which the anode includes an anode current collector which is formed by including a current collector body. The anode current collector is provided thereon with an active anode material layer, and a plurality of conductive particles disposed on the surface of the current collector body with the surface facing the active anode material layer. The plurality of conductive particles is formed to include spherical particles and plate-like particles. Since a tridimensional structure having irregularities is formed on the surface of the current collector body with the spherical particles and plate-like particles, anchoring effects are greatly increased. As a result, the adhesion of the active anode material layer to the anode current collector is considerably improved.

Abstract: A secondary battery is provided that is capable of improving the cycle characteristics. The secondary battery includes a cathode, an anode, and an electrolytic solution. The electrolytic solution is impregnated into a separator provided between the cathode and the anode. In the anode, an anode active material layer and a compound layer are provided on both faces of an anode current collector. The anode active material layer contains a plurality of anode active material particles. The anode active material particles have a multilayer structure of an anode active material containing silicon as an element. The thickness of each layer in the multilayer structure ranges from 50 nm to 1050 nm. Thus, contact characteristics between each layer, contact characteristics between the anode active material layer and the anode current collector, and current collectivity are improved.

Abstract: A secondary battery that has superior safety and is able to provide more favorable cycle characteristics is provided. A laminated body in which a cathode and an anode are layered with a separator impregnated with an electrolytic solution in between is contained in a package can and a package cup. In the anode, an anode active material layer containing an anode active material such as silicon is provided on an anode current collector in which projection sections are formed on a base material. The base material contains carbon and sulfur respectively having a content ratio of 100 ppm or less, and contains crystallites having an average diameter of from 0.01 ?m to 5 ?m both inclusive.

Abstract: A battery capable of improving cycle characteristics is provided. An anode contains Si as an element. Where the Li insertion amount per unit area when the anode is fully charged is A, the Li amount capable of being electronically inserted per unit area of the anode is B, and the maximum utilization ratio C % is (A/B)×100, the maximum utilization ratio C % is in the range from 35% to 85%. The surface roughness Ra value of the anode current collector is 0.2 ?m or more.