The 19rd ROEL Lecture Session was held inviting Prof. Mitsuru Ueda, (Graduate School of Science and Engineering, Tokyo Institute of Technology) on December5, 2011, ,at ROEL conference room.

The proton-exchange membrane fuel cell is for a fuel cell-powered vehicle, home cogenerations, and, as a power supply for small size, carrying, research and development are carried out lively all over the world. I squeeze a focus to the hydrocarbon system macromolecule electrolyte membrane that development is performed as a substitute of the par fluorosystem macromolecule electrolyte membrane and, by this lecture, give an outline by conventional progress and introduce in the study of recent us afterwards.