Extruded sealing layer for biodegradable electrochemical device and methods thereof

A sealing layer composition, comprising:

• a biodegradable polymer comprising a biodegradable polymer present in the sealing layer composition in an amount of from 20% to 90% by volume of the sealing layer composition;
• and
• a filler comprising cellulose, clay, mica, or a combination thereof, wherein:
• the sealing layer composition is extruded.

A method of producing a sealing layer for an electrochemical device, comprising:

• preparing a substrate;
• dispensing a sealing layer composition from an extrusion dispenser onto the substrate;
• and drying the sealing layer composition;
• wherein the sealing layer forms a moisture barrier for the electrochemical device, and wherein the sealing layer composition comprises a biodegradable polymer present in the sealing layer composition in an amount of from 20% to 90% by volume of the sealing layer composition.