Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M4/00—Electrodes
  • H01M4/02—Electrodes composed of, or comprising, active material
  • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
  • H01M4/621—Binders
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M4/00—Electrodes
  • H01M4/02—Electrodes composed of, or comprising, active material
  • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
  • H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M4/00—Electrodes
  • H01M4/02—Electrodes composed of, or comprising, active material
  • H01M4/36—Selection of substances as active materials, active masses, active liquids
  • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
  • H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
  • H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M4/00—Electrodes
  • H01M4/02—Electrodes composed of, or comprising, active material
  • H01M4/36—Selection of substances as active materials, active masses, active liquids
  • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
  • H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
  • H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M4/00—Electrodes
  • H01M4/02—Electrodes composed of, or comprising, active material
  • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M4/00—Electrodes
  • H01M4/02—Electrodes composed of, or comprising, active material
  • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
  • H01M4/621—Binders
  • H01M4/622—Binders being polymers
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M10/00—Secondary cells; Manufacture thereof
  • H01M10/05—Accumulators with non-aqueous electrolyte
  • H01M10/052—Li-accumulators
  • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M4/00—Electrodes
  • H01M4/02—Electrodes composed of, or comprising, active material
  • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
  • H01M4/139—Processes of manufacture
  • H01M4/1391—Processes of manufacture of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M4/00—Electrodes
  • H01M4/02—Electrodes composed of, or comprising, active material
  • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
  • H01M4/621—Binders
  • H01M4/622—Binders being polymers
  • H01M4/623—Binders being polymers fluorinated polymers
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M4/00—Electrodes
  • H01M4/02—Electrodes composed of, or comprising, active material
  • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
  • H01M4/624—Electric conductive fillers
  • H01M4/625—Carbon or graphite
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
  • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
  • Y02E60/10—Energy storage using batteries

Definitions

• the content of the barium titanate is preferably 3.3 to 66.7 parts by mass with respect to 100 parts by mass of the binder.
• the lithium ion secondary battery of this invention has a positive electrode provided with the electrical power collector and the mixture layer formed using the said positive electrode material for lithium ion secondary batteries on the said electrical power collector.
• the positive electrode active material made of a lithium metal oxide is usually dispersed in a binder described later in a powder state.
• the average particle size of the lithium metal oxide is preferably 5 to 20 ⁇ m. If the average particle diameter of the lithium metal oxide is 5 ⁇ m or more, the dispersion step in producing the positive electrode material becomes easy, and the positive electrode active material, conductive carbon, barium titanate, and the like described later are uniformly dispersed. And stable performance can be obtained. On the other hand, if the average particle size of the lithium metal oxide is 20 ⁇ m or less, the reaction site can be sufficiently secured, and thus the battery can be charged and discharged efficiently when used in a secondary battery.
• lithium ions are easily released from the positive electrode during charging, so that more lithium ions can easily move to the negative electrode. Therefore, charging / discharging accompanying the movement of lithium ions is efficiently performed, and the battery capacity of the lithium ion secondary battery is increased.
• the ratio of the copolymer of VDF and TFE is 8.3% by mass or more, the flexibility of the positive electrode material itself is increased, so that cracking hardly occurs even when the positive electrode is deformed.
• the ratio of the copolymer of VDF and TFE is 33.3 mass% or less, the adhesiveness of a positive electrode material and a collector improves more, and favorable battery capacity can be maintained.
• the glass transition temperatures (Tg) of the obtained acrylic copolymers 1 to 3 were determined from the Fox equation shown in the above equation (i).
• the acid values of the acrylic copolymers 1 to 3 were measured by titrating a solution prepared by dissolving potassium hydroxide in methanol so as to be 0.1 N. These results are shown in Table 1.
• the quantity of the monomer in Table 1 is a quantity (mass%) when these sum totals are 100 mass%.
• Abbreviations in Table 1 are as follows.
• the Tg in parentheses for each monomer is the Tg of the homopolymer.
• MMA methyl methacrylate (Tg: 105 ° C.).
• N-BMA n-butyl methacrylate (Tg: 20 ° C.).
• BA n-butyl acrylate (Tg: -54 ° C).
• MMA Methacrylic acid (Tg: 228 ° C.).
• Binders were prepared with the compositions shown in Table 2. Subsequently, a ternary lithium composite metal oxide (average particle size: 10 ⁇ m) represented by LiNi 1/3 Mn 1/3 Co 1/3 O 2 as a positive electrode active material, and acetylene black ( “Denka Black FX-35” manufactured by Denki Kagaku Kogyo Co., Ltd., average primary particle size: 23 nm, specific surface area: 133 m 2 / cm) and barium titanate (average particle size: 300 nm) shown in Table 2
• the positive electrode material was prepared by mixing and dispersing in 100 parts by mass of the binder prepared previously in an amount.

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• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Electrochemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Inorganic Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Battery Electrode And Active Subsutance (AREA)

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Cited By (3)

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• 2011
  • 2011-09-22 JP JP2011207524A patent/JP5825006B2/ja not_active Expired - Fee Related
• 2012
  • 2012-09-12 US US14/238,747 patent/US9577262B2/en active Active
  • 2012-09-12 WO PCT/JP2012/073291 patent/WO2013042591A1/ja not_active Ceased
  • 2012-09-12 CN CN201280034993.3A patent/CN103650213B/zh active Active
  • 2012-09-12 EP EP12834333.2A patent/EP2760066B1/en active Active

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