Electrolyte membrane comprising nanocomposite ion complex,...

Details Electrolyte membrane comprising nanocomposite ion complex,... Electrolyte membrane comprising nanocomposite ion complex,...

2007-08-15

2011-10-18

Truong, Duc (Department: 1765)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Ion-exchange polymer or process of preparing

C521S025000, C528S373000, C528S391000, C528S503000, C524S167000, C428S370000, C427S115000, C525S535000, C525S537000

Reexamination Certificate

active

08039520

ABSTRACT:
An electrolyte membrane includes a nanocomposite ion complex that is a reaction product of a nanocomposite with a basic polymer. The nanocomposite includes a polymer having a sulfonic acid group and an unmodified clay. Either the unmodified clay has a layered structure and is dispersed in the polymer having the sulfonic acid group, and the polymer is intercalated between layers of the clay or the unmodified clay has an exfoliated structure and the exfoliated layers of the unmodified clay are dispersed in the polymer. The electrolyte membrane shows high mechanical strength, high ionic conductivity, and excellent methanol crossover impeding properties even when the degree of sulfonation of the polymer having the sulfonic acid group is high. When a methanol aqueous solution is used as a fuel, the fuel cell including the electrolyte membrane has a low methanol crossover, and thus, has a high operational efficiency and a long lifetime.

REFERENCES:
patent: 7674505 (2010-03-01), Kerres et al.
patent: 1358212 (2002-07-01), None
patent: 2000-290505 (2000-10-01), None
patent: 2003-277610 (2003-10-01), None
Office Action issued by the Patent Office of the People's Republic of China on Feb. 27, 2009.
Chinese Office Action issued Mar. 18, 2010, in corresponding Chinese Patent Application No. 2010031500233620.
Office Action issued by the Japanese Patent Office on Jul. 6, 2010.

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