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.

A proton-exchange membrane includes a polymer matrix, polymer fibers, or a combination thereof. The proton-exchange membrane also includes a proton-conducting material distributed on the polymer matrix, on the polymer fibers, in the polymer fibers, or a combination thereof.

The present disclosure relates to a technique for manufacturing a humidifying membrane including a hydrophobic thin film-coating layer having a nano-sized crack morphology pattern on the surface of an aromatic hydrocarbon-based polymer ion exchange membrane and applying the membrane to a reverse electrodialysis process. The humidifying membrane including a hydrophobic thin film-coating layer having a nano-sized crack morphology pattern on the surface of an aromatic hydrocarbon-based polymer ion exchange membrane, manufactured according to the present disclosure, embodies a low bulk resistance of the ion exchange membrane and significantly improves ion selectivity, thereby overcoming the trade-off relationship between membrane resistance and ion selectivity, and thus may be commercially available as an anion and cation exchange membrane of a reverse electrodialysis device.

The present invention relates to an ion conductor, a method for producing the same, and an ion exchange membrane, a polymer electrolyte membrane and a fuel cell including the same. The ion conductor includes a repeat unit represented by the following Formula 1, and a repeat unit represented by the following Formula 2 or a repeat unit represented by the following Formula 5. Formulae 1, 2 and 3 are described as in the Detailed Description of the Invention. The ion conductor contains a hydrocarbon-based block copolymer which has an easily changeable structure because it includes a hydrophilic region and a hydrophobic region, wherein characteristics of the block copolymer and the ion conductor can be easily regulated through control over the structure of the hydrophilic region and the hydrophobic region, and ion conductivity and durability of the ion conductor are improved within the whole humidity range through micro-phase separation between the hydrophilic region and the hydrophobic region which are structurally controlled.

Described herein are anionic phenylene oligomers and polymers, and devices including these materials. The oligomers and polymers can be prepared in a convenient and well-controlled manner, and can be used in cation exchange 5 membranes. Also described is the controlled synthesis of anionic phenylene monomers and their use in synthesizing anionic oligomers and polymers, with precise control of the position and number of anionic groups.

A proton exchange composite membrane (PECM) and a method of synthesizing the membrane are disclosed. The PECM may include a PBI membrane doped with an acid, an imidazolium-based dicationic ionic liquid, and a mesoporous material. This PECM can be used as an improved high-temperature polymer electrolyte membrane (HT-PEM) fuel cell. The disclosed fuel cell can provide improved proton conductivity, acid uptake, and thermal stability.

polymeric ion-conducting membrane with an enhanced stability against attacks of free radicals for exteding its service time, which comprises (a) a polymer matrix, and (b) a redox stabilizer, where the redox stabilizer is attached to the polymer matrix by chemical or ligand bonding, or the redox stabilizer is physically mixed with the polymer matrix.

A carrier-nanoparticle complex including a carbon carrier, a polymer layer provided on the surface of the carbon carrier and having an amine group and a hydrogen ion exchange group, and metal nanoparticles provided on the polymer layer, a catalyst including the same, an electrochemical battery or a fuel cell including the catalyst, and a method for preparing the same.

The present disclosure provides alkaline-stable m-terphenyl benzimidazolium hydroxide compounds, in which the C2-position is attached to a phenyl group having various substituents at the ortho positions. Polymers incorporating m-terphenylene repeating groups derived from these alkaline-stable benzimidazolium hydroxide compounds are also presented, along with their inclusion in ionic membranes and in electrochemical devices.

Provided are an proton conducting polymer electrolyte membrane and a manufacturing method thereof which control the proton conducting nanochannel size and proton conductivity by phase separation improvement of a polar aprotic solvent in casting the proton conducting polymer electrolyte membrane.