TECHNOLOGY FOCUS - ELECTRICAL POWER AND ENERGY - Preferred Component: The collector is aluminum foil or cooper foil. The active material is positive electrode active material or negative electrode active material. The electrode plate is positive electrode or negative electrode.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Compound: The polar solvent is N,N-dimethylformamide, N,N-dimethylacetamide, N-methyl-2-pyrrolidone, N-ethyl-2-pyrrolidone, vinyl pyrrolidone, vinylformamide, vinylacetamide, 1,3-dimethyl-2-imidazolidinone, dimethylsulfoxide, water, methyl alcohol, ethyl alcohol, propyl alcohol, isopropyl alcohol, butyl alcohol and/or t-butyl alcohol. The organic acid is polybasic acid chosen from 1,2,3-propane tricarboxylic acid, 1,2,4-cyclohexane tricarboxylic acid, 1,2,4,5-cyclohexane tetracarboxylic acid, 1,2,3,4-butane tetracarboxylic acid, trimellitic acid, pyromellitic acid, 1,4,5,8-naphthalene tetracarboxylic acid and/or 1,2,3,4,5,6-cyclohexane hexacarboxylic acid.    TECHNOLOGY FOCUS - POLYMERS - Preferred Properties: The polyvinyl acetal resin has degree of polymerization of 300-5000. The ethylene-vinyl alcohol copolymer has ethylene co-polymerization rate of 10-70 mol%. The unmodified and/or modified polyvinyl alcohol has saponification degree of 30-100% and degree of polymerization of 300-5000. The cyanoethyl-group-containing polymer has a hydroxyl group and hydroxyl value of 10-1000 mg.potassium hydroxide/g. The usage amount of organic acid and/or its derivative is 1-150 mass parts with respect to hydroxyl-containing resin (100 mass parts). Preferred Composition: The coating liquid further contains an active material, and acetylene black, Ketchen black, carbon nanofiber and carbon-type conductive support agent as a conductive support agent. Preferred Process: The active material layer is formed on the under-coat layer. Preferred Compound: The polyvinyl acetal resin is polyvinyl butyral resin, polyvinyl formal resin and/or polyvinyl aceto acetal resin. The modified polyvinyl alcohol is carboxy-group modified polyvinyl alcohol, carbonyl-group modified polyvinyl alcohol, silanol-group modified polyvinyl alcohol, amino-group modified polyvinyl alcohol, cation modified polyvinyl alcohol, sulfonic-acid-group modified polyvinyl alcohol and/or acetoacetal-group modified polyvinyl alcohol. The cyanoethyl-group-containing polymer is cyanoethylated pullulan, cyanoethylated hydroxyalkyl pullulan, cyanoethylated cellulose, cyanoethylated hydroxyalkyl cellulose, cyanoethylated starch, cyanoethylated hydroxyalkyl starch, cyanoethylated chitosan, cyanoethylated hydroxyalkyl chitosan, cyanoethylated saccharose, cyanoethylated polyvinyl alcohol and/or cyanoethylated phenoxy resin.