Lithium ion battery positive electrode resin composition

Summary small binder amount and robust binding properties impart electrolyte injection, good charge and discharge characteristics, a lithium ion battery positive electrode resin composition showing input and output characteristics is disclosed. Lithium ion battery positive electrode resin composition has an average linear thermal expansion coefficient of the polyimide precursor average linear thermal expansion coefficient of from 20 ° C. after imidization to 200 ° C. is 3~50ppm and / or from 20 ° C. to 200 ° C. 3 a polyimide and a lithium ion battery positive electrode resin composition containing a cathode active material is ～50Ppm, a cathode active material a lithium ion conducting material the composite oxide surface comprising lithium is coated.