CARBON BLACK DISPERSION AND USE THEREOF

PROBLEM TO BE SOLVED: To provide a carbon black dispersion using N-methyl-2-pyrrolidone as a solvent, which has lower viscosity and higher concentration and is more excellent in dispersibility and storage stability, compared to a conventional resin type dispersant; and to provide a battery electrode...

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Bibliographische Detailangaben
Hauptverfasser:	MAKI SHINICHIRO, TAKAHASHI KOHEI, TERASAWA MASAHIRO, HIROTA NAOHISA
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES BASIC ELECTRIC ELEMENTS CHEMISTRY DYES ELECTRICITY METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS POLISHES PREPARATION OF CARBON BLACK PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a carbon black dispersion using N-methyl-2-pyrrolidone as a solvent, which has lower viscosity and higher concentration and is more excellent in dispersibility and storage stability, compared to a conventional resin type dispersant; and to provide a battery electrode mixture layer which has homogeneous and good coating film properties and low surface resistance, and a lithium ion secondary battery provided with the same.SOLUTION: Provided is a carbon black dispersion comprising carbon black, a polyvinyl alcohol resin as a dispersant, and N-methyl-2-pyrrolidone as a solvent. A saponification degree of the polyvinyl alcohol resin is 60 to 85 mol%. When a BET specific surface area of the carbon black is denoted by X m/g and an amount of addition of the polyvinyl alcohol resin relative to 1 g of the carbon black is denoted by aX g, a is in a range of 0.00017≤a≤0.00256.