A method of manufacturing an electrode sheet by using an electrode sheet manufacturing apparatus for manufacturing the electrode sheet includes a feeding step of feeding out a sheet body from a roll on which the sheet body is wound, the sheet body including an active layer containing a catalyst laminated on a support layer, and a cutting step of forming the electrode sheet by punching the sheet body by pressing a cutting blade from a side of the support layer against the sheet body that was fed out in the feeding step.

An aspect of the present disclosure is a system that includes a first deposition system that includes a first cylinder having a first outer surface configured to hold a first substrate, a first spray nozzle configured to receive at least a first fluid, and a first fiber nozzle configured to receive at least a second fluid, where the first spray nozzle is configured to operate at a first voltage, the first fiber nozzle is configured to operate at a second voltage, the first cylinder is configured to be electrically connected to ground, the first spray nozzle is configured to apply onto the substrate a first plurality of at least one of particles or droplets from the first fluid, the first fiber nozzle is configured to apply onto the substrate a first fiber from the second fluid, and the first plurality of particles or droplets and the first fiber combine to form a first composite layer on the substrate.

A method for producing secondary battery electrodes includes a step of preparing a moisture powder formed of aggregated particles that contain a plurality of electrode active material particles, a binder resin, and solvent, wherein the solid phase, liquid phase, and gas phase in at least 50 number % or more of the aggregated particles in the moisture powder form a pendular state or a funicular state; a step of forming a coating film composed of the moisture powder on an electrode current collector, while the gas phase remains present; a step of forming a depression in the coating film by carrying out, using a die having an elevation of prescribed height, depression/elevation transfer into the coating film; and a step of carrying out depression/elevation transfer, using a die having an elevation higher than the elevation of prescribed height, by pressing the higher elevation into the depression that has been formed.

The disclosure provides a multi-layer prelithiated anode including (a) a conducting substrate having a first primary surface and a second primary surface; (b) a first layer of lithium metal deposited onto the first primary surface of the conducting substrate; (c) a first graphitic layer that substantially covers the first lithium metal layer; and (d) a first anode active layer deposited on a primary surface of the first graphitic layer. The first anode active layer includes an anode active material. Also provided are a lithium battery including such a prelithiated anode and a method of producing such an anode.

Disclosed is a positive electrode for a lithium-sulfur battery, including a current collector; and a positive electrode active material layer on the current collector, wherein the positive electrode active material layer includes a positive electrode active material and a binder, and the positive electrode active material layer has surface properties defined by the following S.sub.a (arithmetic mean surface roughness of the positive electrode) and S.sub.z (maximum height roughness of the positive electrode) ((i) 1 μm≤S.sub.a≤5 μm, (ii) 10 μm≤S.sub.z≤60 μm (wherein S.sub.a is the average value of the distance from the middle surface of the surface irregularity structure of the positive electrode to the highest point and the lowest point of each irregularity part, and S.sub.z means the distance from the lowest point to the highest point of the positive electrode)) and a method for manufacturing the same.

A roll map coordinate correction system simulating an electrode moving in a roll-to-roll state between an unwinder and a rewinder includes a position expressed as a coordinate in a length direction of the simulated electrode, an encoder configured to derive the position of the electrode according to rotation amounts of the unwinder and the rewinder, and a seam detection sensor configured to detect a seam connection member and acquire a coordinate of the seam connection member in conjunction with the encoder. The system includes a reference point detector configured to detect a plurality of reference points marked on the electrode and acquire coordinates of the reference points in conjunction with the encoder, and a roll map coordinate corrector wherein, the roll map coordinate corrector determines a roll map correction direction by comparing encoder values, calculates an electrode breakage length by comparing coordinates and corrects the coordinates of the roll map.

A powder layer composite includes a current collector, and a powder layer formed on the current collector and having a film thickness of 50 μm or more. The powder layer contains a powder made of at least one type of particle material. A concentration of a solvent contained in the powder layer is 50 ppm or less. A variation in a weight per unit area of the powder layer is 10% or less in an optional region with 30 mm×30 mm in the powder layer.

A method for manufacturing a positive electrode for a secondary battery includes unwinding a positive electrode base material, transferring the positive electrode base material to a first coating unit through a plurality of rollers, coating an insulating material at predetermined positions on opposite sides of the positive electrode base material with respect to a transfer direction of the positive electrode base material to form insulating portions, drying the insulating material to form insulating portions, coating a positive electrode slurry between the insulating portions on the opposite sides of the positive electrode base material, and drying the positive electrode slurry to form a positive electrode film formed with a positive electrode portion on the positive electrode base material.

The present invention provides a manufacturing method of a lithium rechargeable battery, including (i) preparing a lithium metal electrode in which metal lithium (Li) is formed on one surface or both surfaces of a current collector; (ii) applying an electrolyte solution for coating including one or more lithium salts, one or more non-aqueous organic solvents, and one or more additives on a surface of the metal lithium to form a passive film which is a stable coat; (iii) manufacturing an electrode assembly including the lithium metal electrode as a negative electrode; and (iv) housing the electrode assembly in a rechargeable battery case and injecting an electrolyte solution for injection including one or more lithium salts, one or more non-aqueous organic solvents, and one or more additives to manufacture a rechargeable battery.

A method for manufacturing an electrochemical device, implementing a process for manufacturing a porous electrode having a porous layer deposited on a substrate, the porous layer having a porosity of between 20% and 60% by volume and pores with an average diameter of less than 50 nm. The method includes providing a substrate and a colloidal suspension including aggregates or agglomerates of monodisperse primary nanoparticles of an active electrode material, having an average primary diameter of between 2 and 60 nm, the aggregates or agglomerates having an average diameter of between 50 nm and 300 nm, then depositing a layer from the colloidal suspension on the substrate, then drying and consolidating the layer to obtain a mesoporous layer, and then depositing a coating of an electronically conductive material on and inside the pores of the layer.