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OwnerYouichi Nanba, Masataka Takeuchi +2inventors
InventorsYouichi Nanba, Masataka Takeuchi, Akinori Sudoh, Satoshi Iinou
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The invention relates to a carbon material for forming a battery electrode, comprising carbon powder having a homogeneous structure which is produced by causing an organic compound, serving as a ra.w material of a polymer, to deposit onto and/or permeate into carbonaceous particles, and subsequently polymerizing the organic compound, followed by thermal treatment at a temperature of 1,800 to 3,300° C., which comprises a structure which is substantially uniform throughout the entirety of the particle from the surface to the central core where a graphite crystal structure region and an amorphous structure region are distributed. By using the material, a battery having high discharging capacity and low irreversible capacity, with excellent coulombic efficiency and excellent cycle characteristics can be fabricated. The carbon material of the invention may contain carbon fiber filaments. Average roundness, BET specific surface area, true density, laser Roman R value, and average particle size were investigated.
A carbon material for forming a battery electrode, comprising carbon powder having a homogeneous structure which is produced by causing an organic compound, serving as a raw material of a polymer, to deposit onto and/or permeate into carbonaceous particles, and subsequently polymerizing the organic compound, followed by thermal treatment at a temperature of 1,800 to 3,300° C.
A method for producing a carbon material for forming a battery electrode containing carbon powder having a homogeneous structure, comprising a step of treating carbonaceous particles with an organic compound serving as a raw material of a polymer or a solution of the organic compound, to thereby cause the organic compound to deposit onto and/or permeate into the carbonaceous particles;
A method for producing a carbon material for forming a battery electrode containing carbon powder having a homogeneous structure and carbon fiber, comprising a step of treating carbonaceous particles with a mixture of an organic compound serving as a raw material of a polymer and carbon fiber having a filament diameter of 2 to 1,000 nm or with a solution of the mixture, to thereby cause the organic compound to deposit onto and/or permeate into the carbonaceous particles and cause the carbon fiber to adhere to the particles;
Dependencies are inferred from the claim text.