A method of forming a capacitor having a capacitor dielectric layer comprising ABO3, where \u201cA\u201d is selected from the group consisting of Sn and Group IIA metal elements and mixtures thereof, where \u201cB\u201d is selected from the group consisting of Group IVA elements and mixtures thereof, includes providing a sputtering target comprising ABO3 and a substrate within a chamber. The composite panel structure further includes at least two panel assemblies. Each of the battery module groups includes a plurality of rod-shaped battery modules.