Abstract: An integrated sheet structure for a secondary battery, including a first mixture layer containing a first active material and a first binder, a second mixture layer containing a second active material and a second binder, and a third mixture layer located between the first mixture layer and the second mixture layer and containing solid particles and a third binder, in which the first mixture layer and the third mixture layer are bonded each other, and the second mixture layer and the third mixture layer are bonded each other.

Abstract: Provided is a secondary battery including a negative electrode, a positive electrode, a separation layer in contact with an active material-containing layer of the negative electrode, and an aqueous electrolyte. A first concentration corresponding to a first metal concentration represented by Equation 1 (first metal concentration=atomic concentration of Hg, Pb, Zn, and/or Bi/sum of atomic concentrations of elements B to U in periodic table, excluding carbon and oxygen) in a boundary region between the active material-containing layer and the separation layer is 2% or more and 8.2% or less. A ratio of the first concentration to a second concentration corresponding to the first metal concentration represented by Equation 1 in the active material-containing layer excluding the boundary region is 2.5 or more and less than 4.

Abstract: A pressed powder material of the embodiments is a pressed powder material including: a plurality of flaky magnetic metal particles, each flaky magnetic metal particle having a flat surface and a magnetic metal phase containing at least one first element selected from the group consisting of Fe, Co, and Ni, the flaky magnetic metal particles having an average thickness of from 10 nm to 100 ?m and an average value of the ratio of the average length in the flat surface to the thickness of from 5 to 10,000; and an intercalated phase existing between the flaky magnetic metal particles and containing at least one second element selected from the group consisting of oxygen (O), carbon (C), nitrogen (N), and fluorine (F), in which the pressed powder material includes a plane, and in which the pressed powder material includes, in a predetermined cross-section perpendicular to the flat surfaces, a void site at the boundary part between the flat surface of a flaky magnetic metal particle and the intercalated phase in co

Abstract: A separator includes an inorganic particle layer including an inorganic particle, a polymeric binder and a fiber substance. A mass ratio of the fiber substance with respect to a total mass of the inorganic particle, the polymeric binder and the fiber substance is 0.1 mass % or more and 40 mass % or less.

Abstract: According to one embodiment, provided is a secondary battery including a negative electrode, a positive electrode, a first composite layer joined to the negative electrode, a second composite layer joined to the positive electrode, and an aqueous electrolyte. The first composite layer includes a first principal surface on a reverse side with respect to a surface joined to the negative electrode. The second composite layer includes a second principal surface on a reverse side with respect to a surface joined to the positive electrode and facing the first principal surface. Each of the first composite layer and the second composite layer contains inorganic solid particles and a polymeric material. A peel strength ?s between the first principal surface and second principal surface is 0.1 N/mm or less. The aqueous electrolyte includes water.

Abstract: According to one embodiment, an electrode construct including an electrode and a composite membrane is provided. The electrode includes an active material-containing layer and a current collecting layer. The active material-containing layer includes a first principal surface and a second principal surface. The current collecting layer is in contact with the second principal surface. The composite membrane includes a composite layer in contact with the first principal surface. The composite layer contains inorganic solid particles and a polymeric material. A peel strength ?1 at a first interface between the active material-containing layer and the composite layer and a peel strength ?2 at a second interface between the active material-containing layer and the current collecting layer satisfy a relationship of ?1>?2, and ?2?1 N/cm.

Abstract: According to one embodiment, there is provided a secondary battery including a negative electrode, a positive electrode, a first electrolyte, a second electrolyte, and a hydrogel electrolyte. The first electrolyte is in contact with at least a part of the negative electrode. The second electrolyte is in contact with at least a part of the positive electrode. The hydrogel electrolyte includes a gel having a chemically crosslinked structure. A first electrolyte composition of the first electrolyte is different from a second electrolyte composition of the second electrolyte. At least one of the first electrolyte and the second electrolyte includes an aqueous solvent, the aqueous solvent including water. At least a part of at least one of the negative electrode and the positive electrode overlaps at least a part of the hydrogel electrolyte.

Abstract: According to one embodiment, provided is a secondary battery including a negative electrode containing a titanium-containing oxide, a positive electrode, a separator between the negative electrode and the positive electrode, a first aqueous electrolyte, a second aqueous electrolyte, and a third aqueous electrolyte. The first aqueous electrolyte is held in the negative electrode and contains 0.001% by mass to 0.5% by mass of zinc ions. The second aqueous electrolyte is held in the separator and contains 1% by mass to 5% by mass of a first compound that includes a hydrophobic portion and a hydrophilic portion. The third aqueous electrolyte is held in the positive electrode.

Abstract: According to one embodiment, a secondary battery including an electrode and an aqueous electrolyte is provided. The electrode includes a resin current collector. The resin current collector includes a resin matrix and an electro-conductive filler. The aqueous electrolyte includes water.

Abstract: According to one embodiment, a secondary battery includes positive electrodes, negative electrodes, a separator, a positive electrode lead, a negative electrode lead, and an aqueous electrolyte. The positive electrodes each include a positive electrode current collector and a positive electrode tab. The positive electrode current collector includes a first polymeric material. The negative electrodes each include a negative electrode current collector and a negative electrode tab. The negative electrode current collector includes a second polymeric material. At least a portion of the positive electrode tab is in direct contact with the positive electrode lead. At least a portion of the negative electrode tab is in direct contact with the negative electrode lead.

Abstract: According to one embodiment, a secondary battery is provided. The secondary battery includes a first electrode having a first current collector, second electrode having a second current collector, and an aqueous electrolyte. The first electrode includes a first lead, and a first joint for electrically connecting the first current collector and the first lead. At least a part of the surface of the first current collector has a first current collector coating. At least a part of the surface of the first lead has a first lead coating. The thickness of the first lead coating is larger than the thickness of the first current collector coating.

Abstract: Provided is a plurality of flaky magnetic metal particles of embodiments, each flaky magnetic metal particle having a flat surface having either or both of a plurality of concavities and a plurality of convexities, the concavities or convexities being arranged in a first direction and each having a width of 0.1 ?m or more, a length of 1 ?m or more, and an aspect ratio of 2 or higher; and a magnetic metal phase containing at least one primary element selected from the group consisting of iron (Fe), cobalt (Co), and nickel (Ni). The flaky magnetic metal particles have an average thickness of between 10 nm and 100 ?m inclusive, and the average value of the ratio of the average length within the flat surface with respect to the thickness is between 5 and 10,000 inclusive.

Abstract: According to one embodiment, a separator is provided. The separator includes a composite membrane. The composite membrane includes a substrate layer, a first composite layer, and a second composite layer. The first composite layer is located on one surface of the substrate layer. The second composite layer is located on the other surface of the substrate layer. The composite membrane has a coefficient of air permeability of 1×10?14 m2 or less. The first composite layer has a first surface and a second surface. The first surface is in contact with the substrate layer. The second surface is located on an opposite side to the first surface. Denseness of a portion including the first surface is lower than denseness of a portion including the second surface in the first composite layer.

Abstract: According to one embodiment, a battery includes a container member, a separator, a first electrode, a first electrolyte, a second electrode and a second electrolyte. The container member has a housing space in the interior, and the separator is housed in the housing space of the container member. The separator includes a bag, and the first electrode is housed in an interior of the bag. The first electrolyte is retained on the first electrode in the interior of the bag. The second electrode is located outside the bag in the housing space. The second electrolyte is retained by the second electrode outside the bag in the housing space.

Abstract: An electrode comprises a current collector; and an active material-containing layer having active materials on the current collector. The active material-containing layer has a first surface contacting the current collector and a second surface which is opposite side of the first surface. At least one part of the second surface is covered by a compound containing Zn. When an image of the second surface is taken by Scanning Electron Microscope, the image is divided into 100 blocks, a ratio of existence of blocks having hexagonal platelet shaped compound containing Zn to the 100 blocks is calculated, and the ratio of existence of blocks is calculated with respect to 10 images, an average of the ratio of existence of blocks with respect to the 10 images is 20% or less (including 0).

Abstract: A secondary battery includes a positive electrode, a first aqueous electrolyte held on the positive electrode, a negative electrode, a second aqueous electrolyte held on the negative electrode, and a separator interposed between the positive electrode and the negative electrode. A difference between an osmotic pressure (N/m2) of the first aqueous electrolyte and an osmotic pressure (N/m2) of the second aqueous electrolyte is 90% or less (including 0%) of the higher one of the osmotic pressure of the first aqueous electrolyte and the osmotic pressure of the second aqueous electrolyte.

Abstract: An electrode group includes a negative electrode, a positive electrode and a separator. The negative electrode includes a negative electrode active material-containing layer and a mesh negative electrode current collector. The positive electrode includes a positive electrode active material-containing layer. The separator includes a composite membrane containing inorganic solid particles and a polymer material. At least one of a first polymer material constituting the negative electrode active material-containing layer is the same as a second polymer material. A ratio a/b of denseness a and denseness b is greater than 1.05. A peeling strength ?1 is greater than a peeling strength ?2. An air permeability coefficient of a joined body of the composite membrane and the negative electrode is 1×10?19 m2 or more and 1×10?15 m2 or less.

Abstract: In one embodiment, a secondary battery is provided, which includes an electrolytic solution, and a positive electrode and a negative electrode which are immersed in the electrolytic solution. The electrolytic solution contains water, an electrolyte salt, and at least one kind of an organic solvent with a relative permittivity of not more than 42. The relative permittivity of the electrolytic solution fractionated when converted according to a volume fraction is not more than 78.50.

Abstract: According to one embodiment, provided is a secondary battery including a negative electrode containing a titanium-containing oxide, a positive electrode, a separator between the negative electrode and the positive electrode, a first aqueous electrolyte, a second aqueous electrolyte, and a third aqueous electrolyte. The first aqueous electrolyte is held in the negative electrode and contains 0.001% by mass to 0.5% by mass of zinc ions. The second aqueous electrolyte is held in the separator and contains 1% by mass to 5% by mass of a first compound that includes a hydrophobic portion and a hydrophilic portion. The third aqueous electrolyte is held in the positive electrode.

Abstract: According to one embodiment, an electrode construct including an electrode and a composite membrane is provided. The electrode includes an active material-containing layer and a current collecting layer. The active material-containing layer includes a first principal surface and a second principal surface. The current collecting layer is in contact with the second principal surface. The composite membrane includes a composite layer in contact with the first principal surface. The composite layer contains inorganic solid particles and a polymeric material. A peel strength ?1 at a first interface between the active material-containing layer and the composite layer and a peel strength ?2 at a second interface between the active material-containing layer and the current collecting layer satisfy a relationship of ?1>?2, and ?2?1 N/cm.