Title:
METHOD FOR APPLYING POWDER, METHOD FOR PRODUCING SECONDARY BATTERY, METHOD FOR PRODUCING ALL-SOLID-STATE BATTERY, SECONDARY BATTERY AND ALL-SOLID-STATE BATTERY
Document Type and Number:
WIPO Patent Application WO/2024/075484
Kind Code:
A1
Abstract:
[Problem] An electrode of a secondary battery such as LIB and an electrode of an all-solid-state battery have been formed by: preparing a slurry using an active material, a binder, an electrolyte polymer, inorganic electrolyte particles, inorganic electrolyte fibers, a conductive assistant and a solvent that dissolves the binder and the like; applying the slurry to an object such as a collector; and drying and pressing the slurry thereon. Particularly, since the polymer for the positive electrode is a fluorine-based binder such as vinylidene fluoride, an organic solvent that dissolves the polymer has a high boiling point, and a drying furnace therefor is a large device of more than 100 m and requires a large installation area. Consequently, a device for recovering the solvent is large in size and consumes a large amount of energy, and even a battery for battery cars has involved a big problem in terms of CO2 emissions based on LCA. [Solution] By instantaneously changing a slurry, which is obtained by uniformly mixing electrode mixture materials, into a powder by a dedicated device, the powder particles have the same proportions of the materials regardless of the diameters of the particles. By applying the powder directly to an object, or by applying a powder slurry mainly composed of the powder and a solvent having a low boiling point to an object and volatilizing and recovering the solvent within a short period of time, a denser powder layer is formed. According to the present invention, an electrode can be formed by only performing roll pressing.
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Inventors:
MATSUNAGA MASAFUMI (JP)
Application Number:
PCT/JP2023/033496
Publication Date:
April 11, 2024
Filing Date:
September 14, 2023
Export Citation:
Assignee:
MTEK SMART CORP (JP)
International Classes:
H01M4/04; B05D1/06; B05D7/24; H01M4/139; H01M4/36; H01M4/62; H01M4/66; H01M4/80; H01M10/0565
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