TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Method: The catalytic layer is attached by applying transfer pressure of 0.001-0.3 tonnes/cm2. The method further comprises attaching electrode gas diffusion layer and backing layer to catalytic layer through hot-pressing.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The tackifier comprises polyethylene glycol, polyethylene oxide, polyethylene oxide copolymer, polybutyl acrylate copolymer and/or polyurethane-ether copolymer. The binder layer at thickness of 5-100 mu m further comprises basic polymer consisting of poly(4-vinylpyridine), polyethylene imine, poly(acrylamide-co-diallyldimethylammonium chloride), poly(diallyldimethylammonium chloride), polyacrylamide, polyurethane, polyamide, polyimine, polyurea, polybenzoxazole, polybenzimidazole and/or polypyrrolidone. The electrolyte membrane comprises perfluorinated proton conductive polymer membrane, sulfonated polysulfone copolymer, sulfonated poly(ether-ketone), perfluorinated sulfonic acid-containing polymer, sulfonated polyether ether-ketone, polyimide, polystyrene, polysulfone and/or sulfonated polysulfone-clay nanocomposite. The sulfonated polysulfone-clay nanocomposite comprises non-modified clay layers and sulfonated polysulfone disposed between layers. The sulfonated polysulfone is of formula (I) or (II).R1=1-10C alkyl, 2-10C alkenyl, phenyl or nitro;p=0-4;X=-C(CF3)2-, -C(CH3)2- or -P(=O)Y'-;Y'=H or -C6H5;M=Na, K or H;m, n=0.1-0.9; andk=5-500.Preferred Composition: The amount of basic polymer is 0.01-20 pts.wt./100 pts.wt. sulfonated polysulfone-clay nanocomposite. The amount of tackifier is 3-250 pts.wt./100 pts.wt. sulfonated polysulfone-clay nanocomposite. EXAMPLE - A mixture of sulfated-4,4'-dichlorodiphenyl sulfone (0.1 mole), 4,4'dichlorodiphenyl sulfone (0.35 mole), 4,4'-(hexafluoroisopropylidene)diphenol (0.459 mole), montmorillonitrile (3 pts.wt./100 pts.wt. monomer) as nonmodified clay and potassium carbonate (0.55 mole) was refluxed at 160 degrees C for 12 hours with N-methyl-2-pyrrolidinone (NMP, 120 mL) and toluene (100 mL) as solvents to remove water. The toluene was removed after removing water. The reaction mixture was heated to 180 degrees C for 2 hours, polymerized for 4 hours, cooled to room temperature and precipitated with triple distilled water. The obtained precipitate was washed 3 times and dried to form nanocomposite having sulfonation degree of 60%. The prepared sulfonated polysulfone-clay nanocomposite (50 g) having mean molecular weight of 90000 was mixed with polybenzimidazole (2.5 g) as basic polymer, polyethylene glycol (15 g) having mean molecular weight of 3000 as tackifier, and N,N'-dimethylacetamide (5 g) and NMP (50 g) as solvents to obtain binder layer-forming composition. The binder layer-forming composition was coated on polyethylene terephthalate (PET) membrane as support membrane, dried at 100 degrees C for 30 minutes to form binder layer and obtain binder layer-forming transfer film. The binder layer of transfer film at thickness of 10 mu m was disposed adjacent to sulfonated polysulfone-clay nanocomposite electrolyte membrane having mean molecular weight of 90000 and sulfonation degree of 60%, adhered at 20-25 degrees C under 0.1 tonnes/cm2 for 20 minutes, and removed with PET membrane through exfoliation. A 20 wt.% Nafion(RTM: perfluoro-sulfonic acid polymer) solution (1.25 g) and ethylene glycol (3 g) was mixed in high-speed vortex mixer for 3 times at 3 minutes/mixing with platinum (Pt)-black (2 g) to prepare cathode catalytic layer-forming slurry or Pt-ruthenium (Ru) black (2 g) to prepare anode layer-forming slurry. A PTFE film as support membrane for transfer film was disposed on top of flat glass substrate, covered with polyethylene film at thickness of 110 mu m as mask for cathode or anode catalytic layer patterning, poured and coated with cathode catalytic layer-forming slurry to obtain homogenous cathode catalytic layer or anode catalytic layer-forming slurry to obtain homogeneous anode catalytic layer, and dried at 120 degrees C in vacuum oven for 24 hours to produce cathode or anode catalytic layer transfer film. The anode catalytic layer transfer film and cathode catalytic layer transfer film were disposed and transferred on opposing sides of sulfonated polysulfone-clay nanocomposite electrolyte membrane with binder layer at 135 degrees C and 0.1 tonnes/cm2 for 20 minutes. The support membranes were removed to obtain catalyst-coated membrane (CCM) having cathode Pt-black loading of 4.8 mg/cm2 and anode with PtRu-black loading of 4.3 mg/cm2. The obtained CCM was attached with cathode gas diffusion layer and backing layer on one side and anode gas diffusion layer and backing layer on other side and hot-pressed to form membrane electrode assembly (MEA). The formed MEA supplied 1 M methanol to anode and air to cathode. The fuel cell including formed MEA was operated at 60 degrees C.