Metal or alloy film release by low sublimation release layer for electrochemical device

A method for transferring an alkali metal layer comprising:

• disposing a release layer over a flexible substrate, the release layer including a low sublimation point of about 60° C. to about 100° C.;
• disposing the alkali metal layer onto the release layer;
• laminating the release layer and the alkali metal layer between the flexible substrate and a first flexible carrier;
• sublimating the release layer via a treatment source to transfer the alkali metal layer from the flexible substrate to the first flexible carrier;
• and
• peeling away the flexible substrate from the first flexible carrier.

A method for making an energy storage device, comprising:

• disposing a release layer solution over a flexible substrate, the release layer solution comprising a release layer material with a low sublimation point and an alcohol, wherein disposing the release layer solution comprises spreading the release layer solution over the flexible substrate to form a release layer;
• disposing an alkali metal layer onto the release layer;
• laminating the release layer and the alkali metal layer between the flexible substrate and a first flexible carrier, wherein the first flexible carrier is a current collector or an anode;
• sublimating the release layer via a treatment source to transfer the alkali metal layer from the flexible substrate to the first flexible carrier;
• and
• peeling away the flexible substrate from the first flexible carrier.

An alkali metal-containing film stack for energy storage devices, comprising:

• a flexible support layer;
• a release layer disposed over the flexible support layer capable of separating from the flexible support layer, the release layer comprising hexo-Fluro-isopropoxide (LiHFIP) or lithium Nona-Fluoro-Tertbutoxide (LiNFTB);
• an alkali metal layer disposed over the release layer, the alkali metal layer patterned according to a treatment source pattern;
• and
• a flexible carrier.