Jeon J-D – TechConnect Briefs

Determination of Pore Size Distribution of Nafion/Sulfated beta-Cyclodextrin

Jeon J-D, Lee B.H., Kwak S-Y, Seoul National Univesity, KR

Direct methanol fuel cells are promising candidates for portable power sources and transport applications. One of the critical problems hindering the commercialization of DMFCs is high methanol permeation rate across proton-exchange membranes. In this study, [...]

Determination of Pore Size Distribution of Nafion/Sulfated beta-Cyclodextrin

Jeon J-D, Lee B.H., Kwak S-Y, Seoul National Univesity, KR

Direct methanol fuel cells are promising candidates for portable power sources and transport applications. One of the critical problems hindering the commercialization of DMFCs is high methanol permeation rate across proton-exchange membranes. In this study, [...]

Preparation and Characterization of Nafion/Microporous Titanosilicate Composite Membranes as Ion-Conducting Materials

Ryu S.-Y., Jeon J-D, Kwak S-Y, Seoul National Univesity, KR

Nafion is currently the most frequently used polymeric electrolyte in membranes for many fuel cell applications. Direct methanol fuel cells this electrolyte membrane are currently being considered as a desirable electrochemical power source in potable [...]

Preparation and Characterization of Nafion/Microporous Titanosilicate Composite Membranes as Ion-Conducting Materials

Ryu S.-Y., Jeon J-D, Kwak S-Y, Seoul National Univesity, KR

Nafion is currently the most frequently used polymeric electrolyte in membranes for many fuel cell applications. Direct methanol fuel cells this electrolyte membrane are currently being considered as a desirable electrochemical power source in potable [...]

Effects of the Addition of TiO2 Nanoparticles for Polymer Electrolytes Based on Porous Poly(vinylidene fluoride-co-hexafluoropropylene)/Poly(ethylene oxide-co-ethylene carbonate) Membranes

Jeon J-D, Kim M-J, Chung J.W., Kwak S-Y, Seoul National University, KR

In order to ameliorate the performance of polymer electrolytes, we report on a novel solvent-free polymer electrolyte filled with viscous poly(ethylene oxide-co-ethylene carbonate) (P(EO-EC)) into a porous membrane. In addition, to enhance the conductivity and [...]

Evaluation of the Degree of Exfoliation in Poly(epsilon-caprolactone) Nanocomposites Using by the Dynamic Mechanical Analysis

Chung J.W., Jeon J-D, Kwak S-Y, Seoul National University, KR

Nanocomposites composed of poly(epsilon-caprolactone) (PCL) and the organoclays which were layered silicate with the organic modifiers, i.e., nonpolar (OC25A) and polar (OC30B), were prepared by melt mixing. After mixing, we imposed additional heat to PCL/organoclay [...]