Abstract: In some embodiments, a lithium secondary battery is provied. The battery can include a laminate in which positive electrodes and negative electrodes are laminated in a lamination direction. A separator can be interposed between the positive electrode and the negative electrode. A first current collector can be present, the first current collector comprising a pair of conductive layers and a resin layer. The pair of conductive layers can sandwich the resin layer. The first current collector including a first end part. A first electrode tab electrically connected to the first end part can be present. A sealed container can be present including a sealing part. The sealed container can be configured to sandwich the first insulating part of the first electrode tab at the sealing part and to allow a part of the first electrode tab to be taken out to an outside of the sealed container.

Abstract: In one exemplary embodiment, an electrode sheet is provided. The electrode sheet has a longitudinal direction and a lateral direction and constitutes an electrode of a secondary battery by being wound with the lateral direction as an axial direction. The electrode sheet includes a current collector that includes a resin layer, and a first current collecting layer and a second current collecting layer that are respectively provided on both surfaces of the resin layer; a first active material layer that is provided on a surface of the first current collecting layer on a side opposite to the resin layer; and a first metal sheet that is bonded to one end of the first current collecting layer in the lateral direction and has a first bonding mark formed along the longitudinal direction by the bonding, where the first metal sheet has a first extending part that extends from the first current collecting layer in the lateral direction.

Abstract: A battery cell having a layered pressure homogenizing soft medium for liquid/solid state Li-ion rechargeable batteries. The battery cell of the present technology includes one or more battery pouches, a pressure mechanism external to the battery pouches that applies a pressure to the battery pouches, and a layered pressure homogenizing soft medium that is displaced between the battery pouches and the pressure mechanism. By using a number of pressure homogenizing medium layers, each with a specific range of thickness and within a range of physical properties, the battery pouches displaced between the pressure homogenizing medium layers are evenly pressurized by the mediums due to pressure applied by the pressure mechanism to within a desired range of pressure. The pressure applied to the battery pouches by the pressure homogenizing medium is monitored by a pressure sensor, such as a two-dimensional pressure sensor.

Abstract: A battery is provided that has excellent energy density and excellent cycle characteristics early in the cycle. The battery in one aspect of the present invention comprises: a positive electrode; a negative electrode free of a negative electrode active material; a separator that is disposed between the positive electrode and the negative electrode; and a carbon layer that is disposed between the separator and the negative electrode, wherein the capacity of the carbon layer is 22% or less of the capacity of the positive electrode.

Abstract: There is provided a technique for suppressing a decrease in output characteristics and productivity of a lithium secondary battery. A lithium secondary battery is provided. The lithium secondary battery includes (a) a first laminate including a first end part, (b) an intermediate laminate, (c) a second laminate including a second end part, (d) a metal sheet including a first portion that overlaps with the first end part and the second end part in a case of being viewed from the lamination direction and a second portion that does not overlap with the first end part and the second end part in a case of being viewed from the lamination direction, and (e) an electrode tab that is electrically connected to the first laminate and the second laminate. The electrode tab has a first bonding mark and a second bonding mark. The first bonding mark is a bonding mark due to bonding of the electrode tab and the first end part, the first portion, and the second end part of the metal sheet.

Abstract: In one exemplary embodiment, a lithium secondary battery includes (a) a first laminate including a first end part, (b) an intermediate laminate, (c) a second laminate including a second end part, (d) a metal sheet disposed to be lined up in the lamination direction with respect to the first end part and the second end part, the metal sheet having a first bonding mark due to bonding to any one of the first end part or the second end part, and (e) an electrode tab electrically connected to the first laminate and the second laminate. The electrode tab has a second bonding mark due to bonding of the first end part, the metal sheet, and the second end part. The second bonding mark is at a position different from a position of the first bonding mark in viewing from the lamination direction.

Abstract: There is provided a technique for suppressing a decrease in output characteristics and productivity of a lithium secondary battery. The lithium secondary battery includes (a) a first laminate that includes a first end part exposed from a first electrode, (b) an intermediate laminate, (c) a second laminate that includes a second end part exposed from a second electrode, (d) a metal sheet that is disposed between the first end part and the second end part; and (e) an electrode tab that constitutes a bonding region with the first end part, the metal sheet, and the second end part and is electrically connected to the first laminate and the second laminate. The bonding region includes a first region that is configured to integrally laminate a pair of first conductive layers, a metal sheet, and a pair of second conductive layers in a cross section in a lamination direction.

Abstract: It is an object of the present invention to accurately estimate the state of deterioration and service life of a secondary battery having a negative electrode free of a negative electrode active material using a simple configuration.

Abstract: There is provided a technique for improving output characteristics of a lithium secondary battery while reducing the weight of the lithium secondary battery.

Abstract: An anode-free solid-state battery may include a cathode layer; an anode current collector layer; and a separator layer between the cathode layer and the anode current collector layer. The battery can further include an anti-dendrite layer located between the separator layer and the anode current collector layer. The battery further includes an interfacial bonding layer located between the anti-dendrite layer and the anode current collector layer. The interfacial bonding layer increases an amount of electrical connectivity between the anode current collector layer. A first amount of adhesion between the interfacial bonding layer and the anode current collector layer can be greater than a second amount of adhesion between the anti-dendrite layer and the interfacial bonding layer.

Abstract: An anti-dendrite anode-free solid-state battery (SSB) can include a cathode layer; an anode current collector layer; and a lithium gel separator layer between the cathode layer and the anode current collector layer. An anti-dendrite layer may also be present located between the lithium gel separator layer and the anode current collector layer. The anti-dendrite layer can help discourage dendrite formation.

Abstract: There is provided a technique for improving an energy density and safety of a lithium secondary battery. The lithium secondary battery includes an electrode tab and a plurality of positive electrode laminates that are disposed to be spaced from each other in a lamination direction through an interposed negative electrode and separator. Each of the positive electrode laminates has a current collector that is constituted of an insulating layer sandwiched by conductive layers and that is electrically connected to the electrode tab, and a positive electrode provided on both surfaces of the current collector. At least one of the current collectors of the plurality of positive electrode laminates and at least one other current collector are joined to the electrode tab at positions different from each other in a case of being viewed from the lamination direction.

Abstract: The purpose of the present invention is to provide a secondary battery having a high energy density and excellent cycle characteristics, in which the secondary battery has a configuration making it possible to be assembled in a short time. The secondary battery of the present invention includes a laminate formed by winding a sheet having a negative electrode and separators disposed on both surfaces of the negative electrode so that the sheet is folded back a plurality of times; and a plurality of positive electrodes that are respectively disposed in each gap formed between the separators facing each other in the laminate.

Abstract: A phase-change electrolyte separator layer can include a non-reactive scaffold that has open spaces. A lithium liquid may be used that transitions into a lithium gel, the lithium liquid can include a mixture of a polymer additive, a cross-linker additive, a lithium salt; and a solvent. The lithium liquid with the polymer additive and the cross-linker additive can be filled into the open spaces within the non-reactive scaffold. The lithium liquid can then be converted into a lithium gel within the non-reactive scaffold following an application of heat while the lithium liquid is within the open spaces within the non-reactive scaffold.

Abstract: The purpose of the present invention is to provide a lithium secondary battery having a high energy density and an excellent cycle characteristic. The present invention relates to a lithium secondary battery including a positive electrode, a negative electrode not having a negative-electrode active material, and an electrolyte solution, in which at least a part of a surface of the negative electrode facing the positive electrode is coated with a compound including an aromatic ring to which two or more elements selected from the group consisting of N, S, and O are each independently bonded, and the electrolyte solution contains a lithium salt and a solvent represented by Formula (1).

Abstract: The present invention provides an electrolyte solution for a lithium secondary battery, which can achieve both a high energy density and excellent cycle characteristics. The present invention relates to an electrolyte solution for a lithium secondary battery, the electrolyte solution including a cyclic compound represented by Formula (1) or Formula (2), a hydrofluoroether, an ether not having a fluorine atom, and a lithium salt.

Abstract: A phase-change electrolyte separator layer can include a non-reactive scaffold that has open spaces. A lithium liquid may be used that transitions into a lithium gel, the lithium liquid can include a mixture of a polymer additive, a cross-linker additive, a lithium salt; and a solvent. The lithium liquid with the polymer additive and the cross-linker additive can be filled into the open spaces within the non-reactive scaffold. The lithium liquid can then be converted into a lithium gel within the non-reactive scaffold following an application of heat while the lithium liquid is within the open spaces within the non-reactive scaffold.

Abstract: To provide a simple-structured refillable aerosol system that allows for easy release of a propellant gas even from the space outside of an inner bag within a double-structure parent container, that allows for fast transfer-filling of a liquid content from the parent container to a child container. The refillable aerosol system (100) allows the child container (120) to be filled with the liquid content (F) transferred from the parent container (110). The parent container (110) includes a first parent stem (112) for a liquid content storage part (115) and a second parent stem (113) for a propellant storage part (116). The liquid content storage part (115) is pressed by a parent-container propellant (MG). The parent container (110) has a higher internal pressure than the child container (120). The child container (120) is filled with the liquid content (F) ejected through the first parent stem (112) via a child stem (122).

Abstract: The purpose of the present invention is to provide a lithium secondary battery having a high energy density and an excellent cycle characteristic. The present invention relates to a lithium secondary battery including a positive electrode, a negative electrode not having a negative-electrode active material, and an electrolyte solution, in which at least a part of a surface of the negative electrode facing the positive electrode is coated with a compound including an aromatic ring in which two or more elements selected from the group consisting of N, S, and O are each independently bonded, and the electrolyte solution contains a lithium salt and at least one of a compound represented by Formula (1) or a compound represented by Formula (2).

Abstract: The present invention provides a lithium secondary battery having a high energy density. The present invention relates to a lithium secondary battery that a lithium metal deposits on a surface of a negative electrode and charge/discharge are performed by electrolytically dissolving the deposited lithium, in which the negative electrode essentially consists of an Mg alloy or an Mg metal.