| abstract |
An object of the present invention is to provide a method for forming a coating film between a current collector and an electrode layer by using an aqueous coating solution having a small load on the environment and providing the coating film as an undercoat layer excellent in solvent resistance and electrical characteristics, An electrode plate for a power storage device in which the electrode layer is excellent in adhesion and electrolyte resistance to current collectors made of aluminum foil or copper foil and has improved contact resistance with the current collector, And to provide a power storage device including the power storage device. The present invention relates to an aqueous coating solution for an electrode plate for an aqueous system for forming a coating film layer on an electrode plate of an electrical storage device, which comprises an aqueous medium containing water as a polar solvent and having a saponification degree of not less than 40% Vinyl alcohol, unmodified or modified ethylene vinyl alcohol copolymer, a conductive material, and a specific polybasic acid or an acid anhydride thereof, wherein the resin binder is contained in an amount of 0.1 to 3 mass parts 0.01 to 6 parts by mass of polybasic acids, and 0.02 to 40% by mass of solids of the coating liquid. |