Korea Institute of Energy Research

Dong-Hyun Peck

Chang-Soo Kim

Sang-Kyung Kim

Byung-Rok Lee

Seong-Yop Lim

Young-Gap Chun

Doo-Hwan Jung

Ki-Don Nam

Dong Ryul Shin

The present invention relates to a method for producing porous carbon materials comprising the following steps: (S1) forming carbon coatings on surfaces of ceramic nanoparticles; (S2) mixing carbon precursors and ceramic nanoparticles on which carbon coatings are formed in the step (S1); (S3) heat-treating the mixture of the ceramic nanoparticles having carbon coatings thereon and carbon precursors, prepared in the step (S2) to carbonize the mixture; and (S4) removing the ceramic nanoparticles from the material obtained in the step (S3). The method for producing porous carbon materials according to the present invention enables porous carbon materials in which mesopores are uniformly distributed, to be mass produced with low costs. The porous carbon materials having mesopores may be used as catalyst supports for fuel cells, and thus may be used in producing electrodes for fuel cells.

Method for producing porous carbon materials having mesopores and catalyst support for a fuel cell produced using same

A method for fabricating an electrode and membrane assembly (MEA) for polymer electrolyte membrane fuel cells. The MEA comprises a polymer electrolyte membrane on each side of which an electrocatalyst layer is provided in a melted state. A perfluorosulfonyl fluoride copolymer powder ranging, in particle size distribution, from 20 to 200 &mgr;m is hot-pressed at 200-250&deg; C. to give a pre-formed sheet whose opposite sides are then coated with a catalyst ink consisting of Pt/C powder, glycerol and water. This catalyst ink-coated preformed sheet is again subjected to hot pressing at 200-250&deg; C. to embed the catalyst ink into the pre-formed sheet. Hydrolysis in NaOH/methanol or H,SO,solution converts the membrane of the sheet from a non-ionized form to an ionized form.

Method for fabricating membrane and electrode assembly for polymer electrolyte membrane fuel cells

Growing community of inventors

Daejeon, South Korea

Dong-Hyun Peck