The present invention relates to a method for manufacturing a current collector for a battery or a supercapacitor, the manufacturing method comprising a phase of connecting a metal element and a metal strip coated with a coating, the coating being made of a coating material, the coating material being distinct from the strip material, the connecting phase comprising: a superimposing step of the strip and the metal element on a superposition surface, and a step of applying ultrasound by a sonotrode of an ultrasonic welder on the superimposing surface along a line for welding the superimposing surface.

The present disclosure provides a current collector of a secondary battery in which the current inside the battery is easily blocked at the time of inside short circuit, and in which the capacity retention rate and the decreasing rate of the electric resistance are outstanding. The current collector herein disclosed includes a laminate structure in which a resin layer and a metal layers formed on the both surfaces of the resin layer are laminated. The surface of the metal layer includes a rough surface part provided with a plurality of protruding parts and a plurality of recessed parts. On the rough surface part, a resin coat layer is formed, and at least one part of the protruding part among the plurality of protruding parts includes an exposed part that is exposed from the resin coat layer.

The secondary battery current collector disclosed herein includes a resin layer, a first metal layer covering one main surface of the resin layer, and a second metal layer covering the other main surface of the resin layer. Each of the first metal layer and the second metal layer extend beyond an external side of the main surface of the resin layer. The secondary battery current collector has a resin-laminated part, in which the first metal layer, the resin layer, and the second metal layer are laminated; and a metal-laminated part, in which the first metal layer and the second metal layer are overlaid, on an external side of the resin-laminated part. A thickness of the metal-laminated part is greater than a total thickness of the first metal layer and the second metal layer in the thickest portion of the resin-laminated part.

An anode includes: (1) a current collector; and (2) an interfacial layer disposed over the current collector. The interfacial layer includes a film of a layered material and a reinforcing material selectively disposed over certain regions of the film, while other regions of the film remain exposed from the reinforcing material.

A battery of the present disclosure includes a first solid-state battery cell and a buffer layer. The first solid-state battery cell includes a positive electrode, a negative electrode and a solid electrolyte layer located between the positive electrode and the negative electrode. The positive electrode or the negative electrode has a current collector. The buffer layer is in contact with a face of the current collector opposite to the solid electrolyte layer. The buffer layer includes a PTC material, a resin and a first metal. The first metal is at least one selected from the group consisting of Sn, Cu, Al, Mg and Zn.

A method of forming a component can include electrochemically depositing a metallic material onto a carrier component to a thickness of greater than 50 microns. The metallic material can include crystal grains and at least 90% of the crystal grains can include nanotwin boundaries. The metallic material can include a Copper-Silver alloy (Cu—Ag) with between about 0.5-2 at %-Ag.

The present invention relates to a three-dimensional structure electrode, a method for manufacturing same, and an electrochemical element including the electrode. The present invention is characterized by comprising: (a) an upper conductive layer and a lower conductive layer which have a structure constituting an assembly within which a conductive material and a porous nonwoven fabric including a plurality of polymeric fibers are three-dimensionally connected in an irregular and continuous manner, thereby forming a mutually connected porous structure; and (b) an active material layer forming the same assembly structure as the conductive layers and forming a three-dimensionally filled structure in which electrode active material particles are uniformly filled inside the mutually connected porous structure formed in the assembly structure, wherein the active material layer is formed between the upper conductive layer and the lower conductive layer.

The present invention provides a thin film forming composition for energy storage device electrodes, said composition containing a conductive carbon material, a dispersant, a solvent and a polymer that has a partial structure represented by formula (P1) in a side chain.

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(In the formula, L represents —O— or —NH—; R represents an alkylene group having from 1 to 20 carbon atoms; T represents a substituted or unsubstituted amino group, a nitrogen-containing heteroaryl group having from 2 to 20 carbon atoms or a nitrogen-containing aliphatic heterocyclic group having from 2 to 20 carbon atoms; and * represents a bonding hand.)

This application relates to a positive electrode plate and an electrochemical device. The positive electrode plate comprises a metal current collector, a positive electrode active material layer and a safety coating disposed between the metal current collector and the positive electrode active material layer; the safety coating comprises a polymer matrix, a conductive material and an inorganic filler; the positive electrode active material layer comprises Li.sub.1+xNi.sub.aCo.sub.bMe.sub.(1−a−b)O.sub.2, wherein −0.1≤x≤0.2, 0.6≤a<1, 0<b<1, 0<(1−a−b)<1, and Me is at least one of Mn, Al, Mg, Zn, Ga, Ba, Fe, Cr, Sn, V, Sc, Ti and Zr; and the metal current collector is a porous aluminum-containing current collector. The positive electrode plate can improve safety and electrical performances of an electrochemical device (such as a capacitor, a primary battery, or a secondary battery).

An electrode body in which a battery sheet is wound around a first end thereof as an axis. The battery sheet includes: a current collector which includes a first layer and first and second metal layers; a first active material layer laminated on the first metal layer; a second active material layer laminated on the second metal layer; and a separator which comes into contact with the first or the second active material layer. The first and second metal layers are not laminated in at least a portion on the first and second surfaces of the first layer at the first end of the current collector, or the first or second metal layer is not laminated on a surface of either of the first surface or the second surface of the first layer which is on an outward side of a roll at a second end of the current collector.