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AssigneesMitsubishi Materials Corporation, Jemco Inc.
InventorsTsutomu Atsuki, Hiroyuki Imai, Osamu Sakaya
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Disclosed is a positive electrode forming material for a positive electrode of a battery, the material including particles of a positive electrode active material and fine carbon fibers adhering to surfaces of particles of the positive electrode active material in a shape of a network. The positive electrode active material is preferably fine particles having an average particle diameter of 0.03 to 40 μm. Each of the fine carbon fibers is preferably carbon nanofiber having an average fiber diameter of 1 to 100 nm and an aspect ratio of 5 or greater. The carbon nanofiber is surface-oxidized. The positive electrode forming material includes a binder. The content of the fine carbon fibers is 0.5 to 15 parts by mass and the content of the binder is 0.5 to 10 parts by mass with respect to 100 parts by mass of the positive electrode active material.
A positive electrode forming material for a positive electrode of a battery, the material comprising:
Fine carbon fiber for a positive electrode forming material, the fine carbon fibers being made to disperse in a solution without a dispersing agent and adhere to a particle surface of a positive electrode active material in a shape of a network, the fine carbon fiber is a carbon nanofiber having an average fiber diameter of 1 to 100 nm and an aspect ratio of 5 or greater with surfaces hydrophilized by oxidization.
A dispersion for a positive electrode forming material used in formation of a network coating of fine carbon fibers on a particle surface of a positive electrode active material, the dispersion being prepared by dispersing fine carbon fibers with surfaces hydrophilized by oxidization in one or more dispersing solvents selected from a group consisting of a solvent and water.
A coating material for a positive electrode forming material used in formation of a network coating, wherein the coating is prepared by adding a binder to a dispersion, the dispersion being prepared by dispersing fine carbon fibers with surfaces hydrophilized by oxidization in one or more dispersing solvents selected from a group consisting of a solvent and water.
A slurry or a paste for a positive electrode forming material used in forming a network coating on a particle surface of a positive electrode active material, wherein the slurry or paste includes a dispersion, a binder and the positive electrode active material, the dispersion being prepared by dispersing fine carbon fibers with surfaces hydrophilized by oxidization in one or more dispersing solvents selected from a group consisting of a solvent and water.
A method for preparing a dispersion for a positive electrode forming material, the method comprising the steps of:
A method for preparing a coating material for a positive electrode forming material, the method comprising the steps of adding a binder to a dispersion, the dispersion being prepared by dispersing fine carbon fibers with surfaces hydrophilized by oxidization in a dispersion medium.
A method for preparing slurry or paste for a positive electrode forming material, the method comprising the steps of adding a binder and a positive electrode active material to a dispersion, the dispersion being prepared by dispersing fine carbon fibers with surfaces hydrophilized by oxidization in a dispersion medium.
Dependencies are inferred from the claim text.