Abstract:
A method of making a monomer solution of styrene sulfonic acid or the pyridine salt of styrene sulfonic acid or mixtures of both in an organic solvent, said solution being suitable for producing cation exchange membranes. The method comprises the steps of dissolving a metal salt of styrene sulfonate in said organic solvent and pyridinium styrene sulfonate. The mixture solution is reacted under conditions that generate a salt byproduct precipitate and the reactant product solution is collected. Embodiments of the present invention provide for cation exchange membranes and processes for their manufacture. Membranes made by the processes described herein combine low resistance and high permselectivity which make them highly effective for membrane components in desalination of water by electrodialysis (ED), as a power generating sources in reverse electrodialysis and as separators in fuels cells.
Abstract:
The present invention relates to an inorganic ion conductive membrane, a fuel cell and a manufacturing method thereof for manufacturing an inorganic ion conductive membrane as an inorganic coating containing a plurality of air holes through an anodic oxidation reaction and applying the conductive membrane to a fuel cell such that the fuel cell operates stably at all temperatures, exhibits high performance and prevents fuel leakage. According to the present invention, there is provided a method for manufacturing an inorganic ion conductive membrane, including (a) a step of arranging a metal and a conductive wire made of materials same as the metal, and applying an anode current to the metal and a cathode current to the conductive wire, and (b) a step of applying an electrolyte to the metal and the conductive wire to form an inorganic coating containing a plurality of air holes on at least a part of both sides of the metal where the anode current is applied, and there is provided a method for manufacturing a fuel cell using the inorganic ion conductive membrane.
Abstract:
Methods are disclosed for modifying at least a portion of a porous polymeric surface. Such methods include contacting the porous polymeric surface with at least one polyelectrolyte, resulting in the physical adsorption of at least one polyelectrolyte onto the porous polymeric surface to form a charge modified surface. Such coated surfaces may be part of a device or apparatus, including electroosmotic pumps.
Abstract:
The application describes a method of preparing a polymer that includes: mixing in an aqueous solution comprising water and a water-soluble alcohol: a vinyl-based monomer having a sulfonic acid functional group, a bifunctional vinyl-based cross-linking agent, and a polymerization initiator, to form a reaction solution, where the monomer and the cross-linking agent are soluble in the reaction solution; and polymerizing the monomer and cross-linking agent to form the polymer. The application further describes a polymer that includes a polymer backbone comprising sulfonic acid functional groups; and crosslinks comprising alcohol functional groups.
Abstract:
본 발명은 연료전지에 이용되는 고분자 전해질 및 이의 제조 방법에 관한 것으로서, 상기 고분자 전해질의 제조 방법은 다공성 나노웹 지지체의 기공에 가교 가능한 이온 전도체를 충진시키는 단계, 그리고 상기 다공성 나노웹 지지체의 기공에 충진된 이온 전도체를 가교시키는 단계를 포함한다. 상기 고분자 전해질의 제조 방법은 상대적으로 적은 양의 유기 용매를 사용하며, 용매의 증발에 의한 지지체의 결함을 개선할 수 있고, 이온 전도체의 지지체에 대한 함침성과 공정의 편의성을 향상시킬 수 있다.
Abstract:
이온성 고분자 복합체는 이온성 고분자막, 및 외부 전압을 이온성 고분자막에 전달하기 위하여, 이온성 고분자막의 양면에 형성되는 탄소나노튜브-그라핀 합성물질을 포함하는 전극층을 포함한다. 이에, 전극층에 전압 인가 시 이온성 고분자막은 굽힘 변형이 일어난다.