The disclosure provides a method for manufacturing a cation exchange membrane for a fuel cell, comprising the steps of providing a first hydrocarbon-based polymer having a sulfonic acid group; forming a mixture by mixing the first hydrocarbon-based polymer with 3,4-ethylenedioxythiophene (EDOT); adding an oxidizing agent to the mixture to prepare a cation exchange membrane; and activating the sulfonic acid group of the cation exchange membrane.

The present specification relates to a block polymer and a polymer electrolyte membrane comprising the same, a membrane-electrode assembly comprising the polymer electrolyte membrane, a fuel cell comprising the membrane-electrode assembly, and a redox flow battery comprising the polymer electrolyte membrane.

The present disclosure provides polymers comprising at least one repeat unit represented by any one of structural formulas (IA)-(IE) disclosed herein, for example: ##STR00001##
Values for the variables are as disclosed herein. The polymers provided can be employed as ion conductors, for example in fuel cells, and have improved thermal characteristics.

The present specification provides a method for preparing a polymer electrolyte membrane including reducing a ketone group of a polyarylene ether ketone polymer of a polymer electrolyte membrane; and treating the polymer electrolyte membrane with sulfuric acid, a polymer electrolyte membrane prepared using the same, a membrane electrode assembly including the polymer electrolyte membrane, and a fuel cell including the membrane electrode assembly.

The present invention relates to anionic exchange polymers including a poly(phenylene) structure. The structure can include any useful cationic moiety. Methods and uses of such structures and polymers are also described herein. In one instance, such polymers are employed to form a solid membrane.

Thin film composite membranes and methods of fabricating thin film composite membranes are disclosed. A thin film composite membrane can include nitrogen-doped graphene oxide quantum dots. The graphene oxide quantum dots can be doped with nitrogen to increase the performance of the thin film composite membrane. Other particulate compounds can be further integrated with the thin film composite membrane including zeolites, titanium oxides, and sulfur oxides. The thin film composite membranes can be used for various applications including desalination.

The present invention relates to a proton conductive nanocomposite membrane and a method for manufacturing same, the proton conductive nanocomposite membrane having polyhedral oligomeric silsesquioxane (POSS) having a proton donor and POSS having a proton acceptor introduced into an aromatic hydrocarbon polymer membrane having a sulfonyl group. The nano-composite membrane of the present invention has both the POSS having a proton donor and the POSS having a proton acceptor added thereto, and thus protons (cations) that are generated are easily hopped in an ion channel by means of hydrogen bonding, and thus ionic conductivity is increased. In addition, the POSS used in the present invention has a very small size, and thus hardly obstructs proton migration in the ion channel in the polymer membrane, and thus excellent proton conductivity may be enabled. In addition, the proton conductive nanocomposite membrane by the present invention exhibits excellent mechanical strength even though the degree of sulfonation of the polymer membrane is increased.

Arylclobutene-containing multi-functional monomers are useful in the preparation of arylcyclobutene-based polymer coatings. Compositions comprising one or more arylclobutene-containing multi-functional monomers and one or more oligomers comprising as polymerized units one or more arylcyclobutene monomer provide arylcyclobutene-based polymer coatings having reduced stress. Such compositions are useful in the manufacture of electronic devices.

It is an object of the present invention to provide a polymer electrolyte material which has excellent proton conductivity even under the conditions of a low humidity or a low temperature and is excellent in mechanical strength and fuel barrier properties, and which moreover can achieve high output, high energy density and long-term durability in forming a polymer electrolyte fuel cell therefrom, and a polymer electrolyte form article using the same and a method for producing the same, a membrane electrode assembly and a polymer electrolyte fuel cell, each using the same. The present invention employs the following means. Namely, the polymer electrolyte material of the present invention is a polymer electrolyte material including a constituent unit (A1) containing an ionic group and a constituent unit (A2) substantially not containing an ionic group, wherein a phase separation structure is observed by a transmission electron microscope and a crystallization heat measured by differential scanning calorimetry is 0.1 J/g or more, or a phase separation structure is observed by a transmission electron microscope and the degree of crystallinity measured by wide angle X-ray diffraction is 0.5% or more. Also, the polymer electrolyte form article, the membrane electrode assembly and the polymer electrolyte fuel cell of the present invention are characterized by being composed of such polymer electrolyte materials.

Disclosed herein is co-ABPBI membranes comprising co-ABPBI of formula (I), Invention discloses a sol gel process for the synthesis of membranes comprising co-ABPBI of formula (I). ##STR00001##