TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Composition: The electrolyte is chloroaluminate ion liquid formed of aluminum chloride and quat. ammonium salt (preferably aluminum chloride-phenyl trimethyl ammonium chloride liquid). Preferred Process: The carbon-sulfur compound material is prepared by mixing active carbon and monomer sulfur based on mass ratio of 1:3 and placing in ball mill tank, performing ball milling for 6 hours at rotating speed of 200 r/minute based on ball material ratio of 1:1, placing in resistor furnace, heating and compounding at 350 degrees C for 3 hours under argon protection condition and naturally cooling to obtain carbon-sulfur compound material.    TECHNOLOGY FOCUS - METALLURGY - Preferred Process: The cathode material is aluminum foam prepared by using organic foam material as substrate material, de-oiling and de-stressing and ionizing process after pre-processing of de-greasing, placing in chemical copper plating liquid or nickel plating liquid to chemically plate layer of copper conductive surface layer or nickel conductive surface layer or processing using method of coating conductive glue after performing pre-process to substrate material, placing substrate material after conductive process as cathode into electroplating slot of organic electrolyte including aluminum salt containing ion liquid or ion liquid, using metal aluminum sheet as anode, electro-depositing aluminum using direct current, pulse electro-plating method, controlling temperature of electrolyte at 20-150 degrees C for 30-200 minutes, selecting electro-plating current density to 0.001-0.1 A/cm2 in which electro-deposition time is 1-3 (preferably 1-2) hours and electro-plating current density is 0.005-0.05 (preferably 0.005-0.01) A/cm2, continuously mixing electrolyte in electro-plating process to obtain aluminum foam by electro-plating, and performing heat treatment in vacuum by firing and decomposing to remove organic foam as substrate in air atmosphere at 200-800 degrees C for 5-120 minutes and performing heat treatment to aluminum foam after pyrolysis at 300-800 degrees C for 10-20 minutes under protection of hydrogen as reducing atmosphere and cooling to obtain needed aluminum foam cathode material. Preferred Composition: The collector is stainless steel, carbon, copper, aluminum and nickel as conductive materials shaped as foam, net, foil and sheet of metal or carbon fiber cloth.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The organic solvent is acetonitrile, methanol, ethanol, acetone, tetrahydrofuran and/or isopropanol.    TECHNOLOGY FOCUS - POLYMERS - Preferred Process: The anode active material polysulfide cyclopentadiene is prepared by mixing anhydrous sodium sulfide with sublimed sulfur based on mol ratio of 1:1-1:6, adding sublimed sulfur into N,N-dimethylformamide based on proportion of 250 mL/mol, mixing at room temperature for 2 hours, heating to 40-120 degrees C, continuously mixing for 12 hours under inert gas protection to obtain sodium polysulfide solution, adding hexafluorocyclopentadiene into sodium polysulfide solution at 50-150 degrees C based on mol ratio of 1:1, mixing to perform reaction for 24 hours by keeping temperature, washing and filtering to obtain polysulfide cyclopentadiene product after end of reaction, and drying at 80 degrees C in vacuum way for 24 hours to obtain powder of polysulfide cyclopentadiene. Preferred Composition: The conductive agent is active carbon, carbon black, acetylene carbon black, super carbon black, graphite, polyaniline, polyacetylene, polypyrrole and/or polythiophene. The adhesive is polyvinyl acetate, polyvinyl alcohol, polyoxyethylene, polyvinylpyrrolidone, polyvinyl ether, polymethylmethacrylate, polyvinylidene fluoride, polyfluortetraethylene, polyvinyl chloride, polyacrylonitrile, polyvinyl pyridine, polystyrene and/or their derivatives copolymers.