Korea Institute of Science and Technology

Jeung Woo Lee

Hyoung-Juhn Kim

Suk Woo Nam

Sung Pil Yoon

Tae Hoon Lim

In Hwan Oh

Suk-Woo Nam

Eun Ae Cho

Seong Ahn Hong

In-Hwan Oh

Hyung Chul Ham

Tae-Hoon Lim

Seong-Ahn Hong

Jong Hyung Jang

Sang-Yeop Lee

A partially sulfonated polybenzimidazole based polymer for fuel cell membrane is prepared by copolymerizing monomers of 3,3'-diaminobenzidine, isophthalic acid and 5-sulfoisophthalic acid to obtain a partially sulfonated polybenzimidazole, and doping the partially sulfonated polybenzimidazole with inorganic acid.

Partially sulfonated polybenzimidazole based polymer, method for preparing the same, MEA for fuel cell using the polybenzimidazole based polymer and method for preparing the same

Disclosed is a membrane-electrode assembly (MEA) that prevents an electrolyte membrane from being damaged upon the fabrication of a single cell or a stack of fuel cells. The MEA further includes a guard gasket interposed between conventional gaskets, wherein the guard gasket has a thickness corresponding to 70%-95% of the thickness of the electrolyte membrane. The MEA ensures mechanical protection of the electrolyte membrane, and thus prevents the electrolyte membrane from being damaged by an excessive binding pressure upon the fabrication of a single cell or a stack of fuel cells. Furthermore, the contact resistance between the electrolyte membrane and the catalyst layer and the contact resistance between the gas diffusion layer and the catalyst layer can be minimized, thereby improving the quality of a fuel cell.

Membrane-electrode assembly including guard gasket

Growing community of inventors

Busanjin-gu, South Korea

Jeung Woo Lee