Patent ID: 7390336

Claim:
A process for preparing a battery, the process comprising the steps of: a. preparing a metallic lithium or lithium alloy sheet; b. preparing a cathode slurry comprising an active material; an electronic conductive filler; a lithium salt and an ionically conductive electrolyte binder; c. preparing an electrolyte solution comprising a soluble polyimide, a lithium salt, and from about 10% by weight to about 60% by weight of solvent by first preparing a precursor electrolyte solution comprising about 70% to 95% solvent and thereafter partially drying the solution to evaporate a portion of the solvent; d. applying said cathode slurry onto a first side of a current collector to form a cathode film; e. applying said electrolyte solution onto said cathode film to form an electrolyte separator; f. applying said metallic lithium or lithium alloy sheet onto said electrolyte separator to form an electrochemical cell.