Abstract:
PROBLEM TO BE SOLVED: To provide a novel and improved negative electrode active material layer for a lithium ion secondary battery, and the like, the negative electrode active material layer being capable of improving cycle life of a lithium ion secondary battery.SOLUTION: According to an aspect of the present invention, a negative electrode active material layer for a lithium ion secondary battery includes: a composite active material including a first active material containing a carbonaceous active material, a second active material containing a silicon-based active material, and a composite binder and a fibrous conductive agent composited on the surface of the second active material; and a binder for a mixture, for at least binding the first active materials to each other. The content ratio of the second active material, the content ratio of the composite binder, the content ratio of the fibrous conductive agent, the content ratio of the binder for a mixture and a mass ratio of the total mass of the composite binder and the binder for a mixture relative to the total mass of a negative electrode active material layer are values within predetermined ranges, respectively.
Abstract:
PROBLEM TO BE SOLVED: To provide a solar battery which improves the generation efficiency while being thinly packaged, and to provide a manufacturing method of the solar battery.SOLUTION: A solar battery includes: a substrate 100; a first electrode layer 120 positioned on the substrate 100; a second electrode layer 130 positioned on the first electrode layer 120; and a light absorption layer 140 positioned on the second electrode layer 130. The first electrode layer 120 has a first penetration region 121. The second electrode layer 130 is a transparent electrode layer 130 and has a second penetration region 251. The second penetration region 251 is narrower than the first penetration region 121 and is formed at a position corresponding to the first penetration region 121.
Abstract:
PROBLEM TO BE SOLVED: To provide a photoelectric element that reduces recombination loss of carriers due to defects of a semiconductor substrate and improves an open-circuit voltage, and to provide a method of manufacturing the photoelectric element.SOLUTION: A photoelectric element includes: a semiconductor substrate composed of single crystal silicon and having a first surface and a second surface facing to each other; a doping portion formed on a first surface side of the semiconductor substrate; and a first insulating film formed between the doping portion and the second surface of the semiconductor substrate. The doping portion includes a first semiconductor layer containing a first dopant doped into the single crystal silicon and a second semiconductor layer containing a second dopant doped into the single crystal silicon.