A polymer electrolyte composition has excellent practicality and excellent chemical stability as to be able to withstand a strong oxidizing atmosphere during fuel cell operation and is able to achieve excellent proton conductivity under a low-humidified condition and excellent mechanical strength and physical durability, and a polymer electrolyte membrane, a membrane-electrode assembly, and a polymer electrolyte fuel cell produced therefrom. The polymer electrolyte composition includes an ionic group-containing polymer (A), an azole ring-containing compound (B), and a transition metal-containing additive (C), the transition metal being one or more selected from the group consisting of cobalt, nickel, ruthenium, rhodium, palladium, silver, and gold.

Provided are a polymer electrolyte membrane used in fuel cells, and a method for producing the same, the method including a step of filling a crosslinkable ion conductor in the pores of a porous nanoweb support; and a step of crosslinking the ion conductor filled in the pores of the porous nanoweb support. The method for producing a polymer electrolyte membrane uses a relatively smaller amount of an organic solvent, can ameliorate defects of the support caused by solvent evaporation, and can enhance the impregnability of the ion conductor to the support and the convenience of the process.

A multi-catalytic material that includes a polyelectrolyte membrane and methods of preparing the same are provided herein.

The disclosure relates to a polymer membrane comprising a curable composition that includes: (a) a sulfonated hydrogenated styrenic block copolymer (SSBC); (b) hydroxyl group containing compound; (c) at least one cross-linking agent comprising an epoxy-based compound; and (d) optionally, a radical scavenger. The SSBC consists of at least one block S and at least one block .sub.SS, each independently composed of vinyl aromatic units, and at least one block R, composed on hydrogenated diene units. The block .sub.SS has a degree of sulfonation of at least 10 mol %. The SSBC has an ion exchange capacity (IEC) of at least 0.5 meq/g. Upon curing, the polymer membrane demonstrates improved proton conductivity and durability.

Disclosed is an anion exchange membrane. The anion exchange membrane includes: a porous polymer support; and an anion exchange polymer, wherein the anion exchange polymer is situated on a surface and in pores of the porous polymer support, anion exchange groups of the anion exchange polymer are uniformly distributed on the surface and in the pores of the porous polymer support, the porous polymer support has a basis weight of about 10 g/m.sup.2 to about 60 g/m.sup.2, and the anion exchange polymer may be a crosslinked product of a composition including a crosslinkable monomer represented by Formula 1.

The invention relates to porous polymeric cellulose prepared via cellulose crosslinking. The porous polymeric cellulose can be incorporated into membranes and/or hydrogels. In preferred embodiments, the membranes and/or hydrogels can provide high dynamic binding capacity at high flow rates. Membranes and/or hydrogels comprising the porous polymeric cellulose are particularly suitable for filtration, separation, and/or functionalization media.

A composite membrane comprising: a) a first layer comprising a first porous support and a first ionic polymer present in the pores of the first porous support; b) a second layer comprising a second porous support and a second ionic polymer present in the pores of the second porous support; c) a third layer comprising a third porous support, a third ionic polymer and a fourth ionic polymer, wherein the third ionic polymer is present in the pores of the third porous support; wherein: (i) one of the first ionic polymer and the second ionic polymer is a cationic polymer and the other is an anionic polymer; (ii) the third layer c) is interposed between the first layer a) and the second layer b); (iii) the third ionic polymer comprises a network of pores and the fourth ionic polymer is present within the pores of the third ionic polymer; and (iv) one of the third ionic polymer and the fourth ionic polymer is a cationic polymer and the other is an anionic polymer.

A bipolar membrane in which a cation-exchange membrane and an anion-exchange membrane are joined to each other, wherein a leakage ratio of gluconic acid at 60 C. is not more than 1.0%, and the cation-exchange membrane is supported by a polyolefin reinforcing member and, further, contains a polyvinyl chloride.

Disclosed herein are materials for use in battery separators. They include copolymers of a divinylbenzene and one or both of the monomers below (non-linked and linked). R is an n-alkylene group, and n is a positive integer. The copolymer made be made from tertiary amine monomers that are converted to quaternary amines. One battery includes a zinc anode, a silver cathode, and a tri-layer separator. The inner layer uses the linked monomer, and the outer layers use the non-linked monomer.

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Disclosed herein are materials for use in battery separators. They include copolymers of a divinylbenzene and one or both of the monomers below (non-linked and linked). R is an n-alkylene group, and n is a positive integer. The copolymer made be made from tertiary amine monomers that are converted to quaternary amines. One battery includes a zinc anode, a silver cathode, and a tri-layer separator. The inner layer uses the linked monomer, and the outer layers use the non-linked monomer. ##STR00001##