NOVELTY - Casting films comprises: mixing poly(benzimidazophenzophenanthroline) and a room temperature molten salt at weight ratio of 35:65; dissolving mixture in 1% methane sulfonic acid to produce a poly(benzimidazophenzophenanthroline)solution; drop casting the solution onto glass or gold coated glass at 140 degrees C in air and heating for 2 hours to produce films; drying the films in a vacuum oven at 100 degrees C. for least 24 hours under dynamic vacuum; and rinsing the films to remove residual ionic liquid.    USE - The method is useful for casting films (claimed) that are used as cathode materials in type IV super-capacitors, electrochromic windows and fuel cells.    ADVANTAGE - The method: produces polymer films with superior transport properties and very stable capacity over many hundred of cycles; provides no break-in period for the co-cast films and co-cast films having higher charge capacity than the standard films; provides supercapacitors that store 50% more average energy; enables electrochemical capacitors, fast polymer batteries and other energy storage devices to operate at military specifications (-60 degrees C to 60 degrees C); utilizes ionic materials or mixture that remain liquid below -60 degrees C, thus maintaining good ionic conductance at extended temperatures; and is utilized for producing low temperature batteries, low temperature super-capacitors, low temperature electrochemical devices, electrochromic windows, low temperature photovoltaic cells, fuel cells and environmentally friendly solvents.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for synthesizing poly(benzimidazophenzophenanthroline) comprising: deoxygenating polyphosphoric acid by heating to 110 degrees C and stirring under a flow of nitrogen; subliming 1,4,5,8-naphthalenetetracarboxylic acid dianhydride and adding the dianhydride to the polyphosphoric acid to produce a first reaction mixture; adding pyridine to a solution of 1,3-phenylenediamine in anhydrous dichloromethane and cooled to 0 degrees C under gas to produce a second reaction mixture; adding p-toluene sulfonyl chloride portion-wise to the second reaction mixture and allowing to warm to room temperature while stirring for 12 hours; extracting the reaction mixture with water; extracting the reaction mixture with saturated aqueous sodium bicarbonate; extracting the reaction mixture with brine to remove residual bulk water; drying the organic layer over sodium sulfate; filtering the organic layer; concentrating the organic layer in vacuum to remove majority of the organic solvent; pumping the material under high vacuum over about 48 hours; dissolving the material in ethyl acetate and extracting at least twice with 1 M aqueous hydrochloric acid; drying the material over sodium sulfate, filtering the material, and concentrating the material in vacuum; adding dropwise 70% nitric acid to a stirring solution of acetic anhydride to maintain the temperature below 5 degrees C; adding 1,3-(p-toluenesulfamido)benzene to the solution to keep the temperature below 15 degrees C; stirring the solution at room temperature for 12-24 hours to produce a precipitate; collecting the precipitate by washing with water and recrystallizing the precipitate using acetone; suspending 1,3-dinitro-4,6-(p-toluenesulfamido)benzene in anhydrous ethanol in a pressure bomb and flushing with gas; adding palladium on carbon; emptying the gas in the pressure bomb via vacuum and flushing with a gas at least three times, filling the pressure bomb with gas to 50 psi and shaking the suspension; suction-filtering the reaction mixture through Celite (RTM: Diatomaceous earth) and washing with ethanol and acetone; purifying the mixture by dissolving in a minimal amount of acetone and adding spatula tip amounts of sodium bicarbonate and activated charcoal and stirring for 30 minutes to produce a solution; filtering the solution through Celite (RTM: Diatomaceous earth), washing with acetone, and cooling the solution in refrigeration to precipitate a product; isolating the product by filtering and washing with cold acetone; protecting the product from light exposure; adding 1,4,5,8-naphthalenetetracarboxylicacid dianhydride and 1,3-diamino-4,6-(p-toluene-sulfonamido)benzene to the product and adding to polyphosphoric acid at 90 degrees C for 6 hours to produce a reaction mixture; increasing reaction mixture temperature to 180 degrees C, and holding at the temperature for 16 hours; cooling the reaction mixture and precipitating in methanol to produce a residue; dissolving the residue in methane sulfonic acid and reprecipitating in methanol at least twice to produce a polymer; and drying the polymer under vacuum without applying heat for a week.