TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Processes: High temperature heat treatment is rapid thermal expansion method or modified polyaniline method. Porous graphene is prepared using rapid thermal expansion method by grinding 50-500 mg graphite oxide into powder, adding to reaction device, removing oxygen in the process, transferring to muffle furnace at 800-1500 degrees C, performing rapid expansion for 30 s to obtain peeled graphite, adding 50-500 ml absolute ethyl alcohol, ultrasonically dispersing for 20-120 min to obtain black suspension liquid, washing with ethanol, filtering, and vacuum drying at 20-60 degrees C for 12-48 hours. Porous graphene is prepared using modified polyaniline method by adding 50-500 mg fine graphite powder to 50-1000 ml distilled water, ultrasonically dispersing for 20-120 minutes, adding concentrated hydrochloric acid (HCl) to obtain 0.1-5 mol/L solution, dropwise adding 50-200 mg aniline monomer for 20-120 minutes while stirring, continuously stirring for 30 min to obtain mixture, preparing 5-50 ml solution from 0.1-0.5 g ammonium persulfate ((NH4)S2O8), adding 0.1-5 mol/L HCl, dropwise adding to obtained mixture, stirring for 12-48 hours at room temperature, washing with plenty of distilled water, filtering, vacuum drying at 20-80 degrees centigrade to obtain polyaniline-graphite oxide (PANI-GO) powder, grinding, transferring to muffle furnace at 600-1500 degrees C, performing rapid expansion for 10-60 s to obtain PANI-peeled graphite, adding 50-500 ml absolute ethyl alcohol, ultrasonically dispersing for 20-120 min to obtain black suspension liquid, washing with ethanol, filtering, and vacuum drying at 20-60 degrees C for 12-48 hours to obtain polyaniline-graphene nanosheet (PANI-GNS). Graphite oxide is prepared using Hummer's method. Hummer's method is performed by adding 12-48 ml concentrated sulfuric acid to 50-250 ml round bottom flask, quickly adding 1-5 g potassium peroxydisulfate and phosphorus pentoxide, placing in oil bath at 40-180 degrees C while stirring until completely dissolved, slowly adding 1-5 g graphite powder, reacting while continuously stirring at constant speed for 2-10 hours, taking out round bottom flask from oil bath when reaction is finished, naturally cooling to room temperature, pouring in 1-2 L beaker, slowly adding 200-2000 ml water to dilute, placing in fumehood, standing for 12-48 hours, forming layers, removing upper layer clear liquid, filtering with Buchner funnel, washing with plenty of distilled water until neutral, transferring in petri dish, placing for 12-48 hours in fume hood, air-drying to obtain treated graphite, adding 50-200 g concentrated sulfuric acid, uniformly stirring in ice bath, slowly adding 8-30 g potassium permanganate, stirring in ice bath for 1-10 hours, transferring to 35 plus minus 3 degrees C oil bath, stirring for 20-120 min, slowly adding 100-300 ml distilled water, cooling to room temperature, taking out, putting in 2-5 L beaker, adding 500-1500 ml distilled water and 5-60 ml hydrogen peroxide, continuously stirring to eliminate bubbles in which color of mixture turns into yellow from purple black, standing for 5-48 hours, removing supernatant, repeatedly washing with HCl and water with volume ratio of 0.1:10-2:10 and centrifuging to obtain brown colloid substance, vacuum drying at 30-80 degrees C, and grinding. Air electrode diffusion layer is prepared by grinding ammonium oxalate into fine powder, placing 0.5-5 g fine powder in 50-150 ml beaker, adding 20-100 ml absolute ethanol, insulating with plastic wrap, stirring for 1-10 hours, adding 0.5-2 g acetylene black, sufficiently stirring for 6-12 hours, dropwise adding 1-5 g PTFE, continuing stirring for 10-48 hours until uniformly dispersed with plastic wrap cover, removing plastic wrap, putting to 70-90 degrees C water bath while stirring to remove ethanol since ethanol should not be present when rolling on 2 sides of nickel foam, and placing in oven at 100-150 degrees C for 10-72 hours. Preferred Components: Graphite powder is 325 mesh crystalline flake graphite. Preferred Parameters: Porous graphene has pore diameter of 3-100 nm and specific surface area of 400-500 m2/g.