Abstract: Provided is a slurry composition for an electrochemical device positive electrode that can form a positive electrode that can reduce IV resistance of an electrochemical device while also causing the electrochemical device to display excellent cycle characteristics and high-temperature storage characteristics. The slurry composition contains composite particles, a binder, and a dispersion medium. The composite particles include positive electrode active material particles and a carbon coating at least partially covering outer surfaces thereof. The amount of the carbon coating in the composite particles is 0.4 parts by mass to 3.5 parts by mass per 100 parts by mass of the positive electrode active material particles. The carbon coating has a Raman spectrum D/G ratio of 0.6 to 1.7. The binder includes a polymer A including a nitrile group-containing monomer unit and an alkylene structural unit and constituting a proportion of 0.05 mass % to 2.0 mass % among all solid content.

Abstract: A conductive material dispersion liquid for an electrochemical device contains a conductive material, a dispersant, and a solvent. The conductive material dispersion liquid for an electrochemical device has a zeta potential absolute value within a range of 30 mV or less, the dispersant is a polymer including a nitrile group-containing monomer unit and an alkylene structural unit, and the solvent is an organic solvent.

Abstract: Provided is an electrode for an electrochemical device that can cause an electrochemical device to display excellent cycle characteristics, rate characteristics, and high-temperature storage characteristics. The electrode includes a current collector and an electrode mixed material layer formed on the current collector. The electrode mixed material layer contains an electrode active material, a conductive material, and a dispersant, and the conductive material includes one or more carbon nanotubes. When mixed material layer resistance of the electrode mixed material layer is taken to be X ?·cm and interfacial resistance of the electrode mixed material layer with the current collector is taken to be Y ?·cm2, X is 20 or less, Y is 0.3 or less, and a ratio (X/Y) of X relative to Y is not less than 40 and not more than 1,000.

Abstract: Provided are a paste for a secondary battery, and method of producing the same, with which it is possible to produce an electrode that can reduce internal resistance of a secondary battery and that can cause the secondary battery to display excellent cycle characteristics. The paste for a secondary battery contains a conductive additive, a polymer, and a dispersion medium. The conductive additive includes one or more carbon nanotubes having a surface base content of not less than 0.01 mmol/g and not more than 0.10 mmol/g and a ratio of surface acid content relative to the surface base content of not less than 0.1 and not more than 1.0.

Abstract: Provided is a paste for a secondary battery that can cause an electrode mixed material layer to display excellent adhesiveness and can reduce internal resistance of a secondary battery. The paste for a secondary battery contains a conductive additive, a polymer, and a dispersion medium. The conductive additive includes one or more carbon nanotubes having a surface acid content of not less than 0.01 mmol/g and not more than 0.15 mmol/g, a surface base content of not less than 0.005 mmol/g and not more than 0.500 mmol/g, a ratio of the surface acid content relative to the surface base content of not less than 1.3 and not more than 3.0, and a specific surface area of 150 m2/g or more.