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1. WO1996004688 - ELECTRODE MATERIAL FOR NONAQUEOUS SOLVENT SECONDARY CELL AND METHOD OF MANUFACTURING THE SAME

Publication Number WO/1996/004688
Publication Date 15.02.1996
International Application No. PCT/JP1995/001519
International Filing Date 31.07.1995
IPC
C04B 35/532 2006.01
CCHEMISTRY; METALLURGY
04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
BLIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
35Shaped ceramic products characterised by their composition; Ceramic compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
515based on non-oxides
52based on carbon, e.g. graphite
528obtained from carbonaceous particles with or without other non-organic components
532containing a carbonisable binder
H01M 4/583 2010.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of, or comprising, active material
36Selection of substances as active materials, active masses, active liquids
58of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
583Carbonaceous material, e.g. graphite-intercalation compounds or CFx
H01M 4/60 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of, or comprising, active material
36Selection of substances as active materials, active masses, active liquids
60of organic compounds
CPC
C04B 35/532
CCHEMISTRY; METALLURGY
04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE
35Shaped ceramic products characterised by their composition
515based on non-oxide ceramics
52based on carbon, e.g. graphite
528obtained from carbonaceous particles with or without other non-organic components
532containing a carbonisable binder
H01M 4/366
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of or comprising active material
36Selection of substances as active materials, active masses, active liquids
362Composites
366as layered products
H01M 4/587
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of or comprising active material
36Selection of substances as active materials, active masses, active liquids
58of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
583Carbonaceous material, e.g. graphite-intercalation compounds or CFx
587for inserting or intercalating light metals
Applicants
  • MITSUBISHI CHEMICAL CORP. [JP/JP]; 5-2, Marunouchi 2-chome Chiyoda-ku Tokyo 100, JP (AllExceptUS)
  • HAYASHI, Manabu [JP/JP]; JP (UsOnly)
  • YAMAGUCHI, Shoji [JP/JP]; JP (UsOnly)
  • MIZUTANI, Fumikazu [JP/JP]; JP (UsOnly)
  • SUGAWARA, Keiko [JP/JP]; JP (UsOnly)
  • MORI, Shoichiro [JP/JP]; JP (UsOnly)
Inventors
  • HAYASHI, Manabu; JP
  • YAMAGUCHI, Shoji; JP
  • MIZUTANI, Fumikazu; JP
  • SUGAWARA, Keiko; JP
  • MORI, Shoichiro; JP
Agents
  • HASEGAWA, Koji; Mitsubishi Chemical Corporation 5-2, Marunouchi 2-chome Chiyoda-ku Tokyo 100, JP
Priority Data
6/18347904.08.1994JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) ELECTRODE MATERIAL FOR NONAQUEOUS SOLVENT SECONDARY CELL AND METHOD OF MANUFACTURING THE SAME
(FR) SUBSTANCE D'ELECTRODE POUR ELEMENT SECONDAIRE D'ACCUMULATEUR ELECTRIQUE A SOLVANT NON AQUEUX, ET PROCEDE DE FABRICATION
Abstract
(EN)
An electrode material for a nonaqueous solvent secondary cell, characterized in that the electrode material is a composite carbonaceous substance in which carbides of an organic substance containing not more than 12 parts by weight and not less than 0.1 parts by weight of residual carbon after heat treatment based on 100 parts by weight of a graphite carbonaceous substance is deposited on the surface of the graphite carbonaceous substance; and a method of manufacturing an electrode material for a nonaqueous solvent secondary cell, characterized in that the method has the steps of introducing a slurry prepared by adding an aromatic organic solvent to a mixture of particles of graphite carbonaceous substance and an organic material and adjusted in viscosity to not higher than 10,000 cp, into an agitator provided with a reaction chamber in which a paddle rotated by a shaft is installed, the inner surface of which reaction chamber is formed substantially along the outermost locus of rotation of the paddle, and a solvent deaeration mechanism, heating the mixture to a temperature above the boiling point of the solvent and below 600 °C while agitating the same, so as to produce a solid intermediate material, and heating the intermediate material above 600 °C in an inert gas atmosphere so as to carbonize the same. Using the electrode material a nonaqueous solvent secondary cell having such excellent electric characteristics that the irreversible capacity is suppressed to a very low level while maintaining as high a discharge capacity as that of graphite, and a high charging efficiency is high, and an improved stability with respect to an electrolyte is produced. By the manufacturing method, such a composite carbonaceous material of a high uniform performance can be produced stably and efficiently.
(FR)
La présente invention concerne une substance d'électrode pour élément secondaire d'accumulateur électrique à solvant non aqueux. Cette électrode se caractérise en ce qu'elle est composée d'une substance carbonée composite, des carbures provenant d'une substance organique dont la teneur pondérale en carbone résiduel, après traitement thermique, pour 100 parties en poids d'une substance carbonée de graphite, est de 12 parties au maximum et de 0,1 partie au minimum, étant déposés sur la surface de ladite substance carbonée de graphite. L'invention concerne également un procédé de fabrication d'une substance d'électrode pour élément secondaire d'accumulateur électrique à solvant non aqueux. Le procédé comporte plusieurs étapes caractéristiques: introduction, en agitateur, d'une boue liquide obtenue par addition d'un solvant organique aromatique dans un mélange de particules d'une substance carbonée de graphite et d'une substance organique, la viscosité de la boue étant maintenue en dessous 10.000 cp, ledit agitateur comportant, d'une part une chambre de réaction dans laquelle tourne une palette entraînée par un arbre, la surface intérieure de la chambre de réaction étant sensiblement disposée le long du lieu de rotation le plus externe de la palette, et d'autre part un dispositif d'élimination de l'air du solvant; chauffage du mélange à une température supérieure au point d'ébullition du solvant mais inférieure à 600 °C tout en continuant l'agitation jusqu'à obtenir une substance intermédiaire solide; et chauffage de la substance intermédiaire au dessus de 600 °C dans une atmosphère de gaz inerte jusqu'à carboniser ladite substance intermédiaire. Grâce à cette substance d'électrode, on peut produire un élément secondaire d'accumulateur électrique à solvant non aqueux dont les caractéristiques électriques permettent, d'une part, de ramener la capacité irréversible à un niveau très bas tout en conservant une capacité de décharge aussi élevée que celle du graphite, d'autre part, d'atteindre une capacité de charge maximale élevée, et enfin d'améliorer la stabilité de l'électrolyte. Le procédé de fabrication permet, quant à lui, la production stable et à bon rendement d'une telle substance composite carbonée présentant un rendement uniforme élevé.
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