Abstract: The present invention provides a resin composition that has excellent application properties and excellent adhesion, can achieve high electron conductivity simultaneously with the dispersibility and dispersion stability of fibrous carbon materials, and enables production of lithium secondary batteries having high capacity retention. Provided is a resin composition containing: a fibrous carbon material; a non-aqueous solvent; and a polyvinyl acetal resin, the polyvinyl acetal resin including a structural unit containing an acidic functional group, and having an average degree of polymerization of 150 or greater and 1,500 or less and a hydroxy group content of 40.0 mol % or greater and 80.0 mol % or less.

Abstract: The present invention provides a resin composition for a secondary battery electrode that is excellent in the dispersibility of active materials, resistance against electrolyte solutions, and coating film density and capable of achieving both high conductivity and adhesion. Provided is a resin composition for a secondary battery electrode, the resin composition containing: an active material; a non-aqueous solvent; and a polyvinyl acetal resin, the polyvinyl acetal resin including a structural unit containing a halogen atom, and having a Vicat softening temperature of 50° C. or higher and 150° C. or lower.

Abstract: The present invention provides an all-solid-state battery composition that is excellent in dispersibility of an active material or an electrolyte and adhesion, can provide a high-strength coating film or molded body, and enables the production of a high-capacity all-solid-state battery with low electrode resistance, and also provides an all-solid-state battery including the all-solid-state battery composition. The present invention relates to an all-solid-state battery composition to be used for an all-solid-state battery, the composition containing: an active material and/or a solid electrolyte; a polyvinyl acetal resin; and an organic solvent, the polyvinyl acetal resin having an average degree of polymerization of 5,000 or greater and 10,000 or less.

Abstract: The present invention aims to provide a composition for a storage battery electrode and a pigment composition each containing a modified polyvinyl acetal resin that has excellent dispersing properties, adhesion, and stability over time and that is capable of preventing degradation caused by an electrolyte solution when used for an electrode of a storage battery, enabling the production of a high-power storage battery. Provided is a modified polyvinyl acetal resin including a chlorine atom-containing structural unit.