NOVELTY - A lithium-producing cell structure (110) consists of a cell component having cathode (124) and sulfuric acid solution containing lithium ions and anions within the cell component, and a composite layer provided between cathode and electrolyte aqueous solution. The composite layer has a lithium ion-conductive glass ceramic material (114) and a lithium ion-conductive barrier film (120) for isolating cathode forming lithium from the electrolyte aqueous solution.    USE - Cell structure is used in production of lithium (claimed). Uses include but are not limited to production of ceramics, enamels, and glass, flux for fusion of metals and processing silica, ovenware, thickening oil, lubricating grease, lithium-ion polymer battery, lithium-iron phosphate battery, and nanowire battery.    ADVANTAGE - The lithium-producing cell structure enables production and direct recovery of lithium with lithium ion-conducting composite layer having excellent stability even in high-corrosive acid environment of the anode compartment, and reduced energy consumption.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for production of lithium, which involves providing a lithium ion source in a sulfuric acid solvent, dissolving the lithium anions in the solvent and forming a lithium feed solution, providing anode (112) in contact with the solution, providing cathode suitable for electrolysis of lithium and forming electrolysis cell by contacting with the solution through the composite ion-conducting barrier, providing an ionizing electric current to the electrolysis cell and producing lithium metal at the cathode, and providing composite layer transecting an axis of the cell component for isolating cathode forming lithium from the electrolyte aqueous solution.    DESCRIPTION OF DRAWING(S) - The drawing shows the schematic view of cell structure.    Cell structure (110)    Anode (112)    Lithium ion-conductive glass ceramic material (114)    Lithium ion-conductive barrier film (120)    Cathode (124)