Research Papers by Young Moo Lee

A passive direct methanol fuel cell (DMFC) system was fabricated based on a sulfonated polyimide–silica nanocomposite (SPI–SiO2-1) membrane with high proton conductivity, low methanol (MeOH) permeability, and thin thickness compared to Nafion 117 as a reference sample. The electrochemical performanc

N-vinyl-2-pyrroldinone was grafted by the UV-irradiation process onto the porous surface of poly(vinyl chloride) (PVC) membrane to increase the surface wettability and to decrease the adsorptive fouling. The graft yield of the modified PVC membrane was maximum at 5 min UV exposure time and 20 wt% aq

We studied the synthesis and characterization of a thermally stable metal-containing in sulfonated polyimides (M-SPI) based on benzophenone tetracarboxylic dianhydride (BTDA), 4, 4’-diamino 2, 2’-biphenyl disulfonic acid (BDSA) and meta-phenylenediamine (mPDA). X-ray photoelectron spectroscopy (XPS)