A current-collector metal foil has at least at least one roughened surface and numerous recessed parts are present on the roughened surface. Each recessed part has an edge part that surrounds a bottom-surface part and is raised above the bottom-surface part. The average Feret diameter L.sub.ave of the recessed parts is 0.5-50 m. The current-collector metal foil is suitable for use, e.g., as an electrode current collector for a lithium-ion secondary battery, a sodium secondary battery, an electric double-layer capacitor, or a lithium-ion capacitor.

A current-collector metal foil has at least at least one roughened surface and numerous recessed parts are present on the roughened surface. Each recessed part has an edge part that surrounds a bottom-surface part and is raised above the bottom-surface part. The average Feret diameter L.sub.ave of the recessed parts is 0.5-50 m. The current-collector metal foil is suitable for use, e.g., as an electrode current collector for a lithium-ion secondary battery, a sodium secondary battery, an electric double-layer capacitor, or a lithium-ion capacitor.

A laminating body for laminating a foil onto a substrate includes a pressure area on which there is imprinted a structure which forms an embossing in the foil upon lamination of the foil onto the substrate.

An electrode manufacturing device that applies pressure to an electrode containing a coating part and a non-coating part is provided. The electrode manufacturing device includes: a first pressure roll that applies pressure to the non-coating part; a second pressure roll that applies pressure to the coating part; and a connection part that penetrates through the center of the first pressure roll and the center of the second pressure roll, respectively, wherein a difference between a radius of the first pressure roll and a radius of the second pressure roll is equal to or smaller than a step difference between the coating part and the non-coating part.

To provide a seedsheet manufacturing apparatus that can increase a manufacturing speed and a seedsheet. A seedsheet manufacturing apparatus includes: a paste reservoir configured to store a paste in which a seed and a fluid are mixed; a plate cylinder disposed above the paste reservoir; a doctor blade configured to scrape a portion of the paste adhering to a surface of the plate cylinder; a pressing roller disposed such that the pressing roller faces the plate cylinder and a mounting paper is allowed to pass through a gap formed between the pressing roller and the surface of the plate cylinder; a supply unit configured to feed the mounting paper to the gap; and a recovery unit configured to recover the mounting paper that passes through the gap.

This manufacturing method is a method of manufacturing a compressed strip-shaped electrode plate. The method includes: a preliminary compression step of forming a pre-compressed strip-shaped electrode plate by roll-pressing an uncompressed strip-shaped electrode plate in which an uncompressed active material layer that is not yet compressed is formed on a current collector foil; an attraction and removal step of attracting and removing fine particles of active material particles from near a surface of a pre-compressed active material layer by an attracting magnet that is disposed so as to be separated from the pre-compressed active material layer in a thickness direction; and a main compression step of obtaining the compressed strip-shaped electrode plate by roll-pressing a particle-removed strip-shaped electrode plate from which the fine particles have been removed.

This manufacturing method is a method of manufacturing a compressed strip-shaped electrode plate. The method includes: a preliminary compression step of forming a pre-compressed strip-shaped electrode plate by roll-pressing an uncompressed strip-shaped electrode plate in which an uncompressed active material layer that is not yet compressed is formed on a current collector foil; an attraction and removal step of attracting and removing fine particles of active material particles from near a surface of a pre-compressed active material layer by an attracting magnet that is disposed so as to be separated from the pre-compressed active material layer in a thickness direction; and a main compression step of obtaining the compressed strip-shaped electrode plate by roll-pressing a particle-removed strip-shaped electrode plate from which the fine particles have been removed.

Systems and methods for texturing substrates (e.g., glass, metal, and the like) and the textured substrates produced using such systems and methods are disclosed. An exemplary textured substrate includes a surface having a portion with a root-mean-square roughness between 40 to 1000 microns and an autocorrelation function greater than 0.5 for distances less than 50 microns. An exemplary system for texturing a substrate includes a plunger with a textured surface, where a portion of the textured surface has a root-mean-square roughness between 40 to 1000 microns and an autocorrelation function greater than 0.5 for distances less than 50 microns. An exemplary method for texturing a substrate includes the steps of generating a pattern defining a texture, and 3-D printing the pattern on the substrate to form the texture.

A rolling apparatus includes a roller assembly and a power source. The roller assembly includes four rollers, where the four rollers (110a) are arranged side by side in pairs along a first direction and a second direction intersected with each other, and two rollers arranged side by side define a roll gap therebetween. The power source drives two rollers arranged diagonally to rotate in a same direction around their axes. Two roll gaps defined by one of the two rollers arranged diagonally and the two rollers arranged side by side therewith are used for rolling a first electrode plate twice, and two roll gaps defined by the other one of the two rollers arranged diagonally and the two rollers arranged side by side therewith are used for rolling a second electrode plate twice. In the rolling apparatus, the four rollers form strip moving routes.

To provide a seedsheet manufacturing apparatus that can increase a manufacturing speed and a seedsheet. A seedsheet manufacturing apparatus according to the present disclosure includes: a paste reservoir configured to store a paste in which a seed and a fluid are mixed; a plate cylinder disposed above the paste reservoir; a doctor blade configured to scrape a portion of the paste adhering to a surface of the plate cylinder; a pressing roller disposed such that the pressing roller faces the plate cylinder and a mounting paper is allowed to pass through a gap formed between the pressing roller and the surface of the plate cylinder; a supply unit configured to feed the mounting paper to the gap; and a recovery unit configured to recover the mounting paper that passes through the gap.