This invention provides a nonaqueous lithium-type storage element using an activated carbon having a specific porous structure in a positive electrode. An epitaxial layer is formed on a substrate. The multi-layer coating may comprise a relatively soft base layer and one or more relatively hard particle layers overlying the base layer. The process makes it possible to reduce the temperature at which the substrate has to be heated in order to form the single-crystal portion by selective epitaxial growth. The aperture enables the game piece to be more easily tossed toward and adhere to a magnetically attractive surface.