RELEASE LAYER FOR ALKALI METAL ON PLASTIC SUBSTRATES

An alkali metal-containing film stack for energy storage devices is provided. The alkali metal-containing film stack can be a lithium film stack having a flexible support layer and a release layer disposed over the flexible support layer capable of separating from the flexible support layer. The release layer includes one or more nanosheets, such as two-dimensional materials. An alkali metal-containing layer, such as a lithium layer is disposed over the release layer.