Tae-Ho Kim
University of Science and Technology, Sana'a
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Publication
Featured researches published by Tae-Ho Kim.
Macromolecular Research | 2013
In Hyouk Sung; Duk Man Yu; Young Jun Yoon; Tae-Ho Kim; Jang Yong Lee; Sung Kwon Hong; Young Taik Hong
AbstractWe have synthesized a novel composite membrane composed of hydrophilic oligomer-g-carbon nanotube (CNT) and sulfonated poly(arylene ether sulfone) (sPAES) for proton exchange membrane fuel cell (PEMFC). Hydrophilic oligomer-g-CNT is made by linking sPAES hydrophilic oligomers of either 3 k, 7 k, or 15 k molecular weight to CNTs. Hydrophilic oligomers allow better dispersion of CNTs in the polymer matrix, and the well dispersed CNTs act as a reinforcing agent in the membrane. The sulfonic acid groups on the hydrophilic oligomer-g-CNT form effective water transport channels which can hold more water under low humidity conditions. Therefore, the developed composite membrane shows proton conductivity enhancement of 40% compared to the pristine membrane at 80 °C and 50% relative humidity (RH) condition. Single cell performances and mechanical properties are also improved in the composite membrane. Especially, current density of the composite membrane prepared with 1 wt% hydrophilic oligomer (15 k)-g-CNT shows an 86% increase compared to that of the pristine membrane at 0.6 V, 80 °C, and 50% RH condition.n
Journal of Materials Chemistry | 2018
Jun Woo Jeon; Jae Hee Han; Sung-Kon Kim; Dong-Gyun Kim; Yong Seok Kim; Dong Hack Suh; Young Taik Hong; Tae-Ho Kim; Byoung Gak Kim
The growing demands of next-generation applications for high power and energy sources necessitate advances in hierarchically porous carbon-based energy storage materials, which improve the overall kinetics of electrolytic reactions by providing efficient ion and electron transport pathways and facilitate electrolyte infiltration into the electrode during charging/discharging. Herein, we fabricate hierarchically structured porous carbon electrodes (cNPIM), prepared by solution casting of a polymer of intrinsic microporosity (PIM-1) followed by nonsolvent-induced phase separation and carbonization. The obtained material exhibits a considerable surface area (∼2100 m2 g−1), high electrical conductivity (150 S cm−1), high specific capacitances (345, 235, and 195 F g−1 in three-, two-electrode aqueous systems, and two-electrode organic systems, respectively) at 1 A g−1, and an exceptional specific energy of 43.2 W h kg−1 at a specific power of 1.25 kW kg−1, featuring a pore size gradient in the surface normal direction.
International Journal of Hydrogen Energy | 2012
Ji Young Park; Tae-Ho Kim; Hyung Joong Kim; Jong-Ho Choi; Young Taik Hong
Journal of Membrane Science | 2013
Duk Man Yu; Sangjun Yoon; Tae-Ho Kim; Jang Yong Lee; Jae-Rock Lee; Young Taik Hong
Solid State Ionics | 2013
Duk Man Yu; Young Jun Yoon; Tae-Ho Kim; Jang Yong Lee; Young Taik Hong
Journal of Membrane Science | 2011
Soon Yong So; Young Jun Yoon; Tae-Ho Kim; Kyungseok Yoon; Young Taik Hong
Journal of Power Sources | 2011
Young Jun Yoon; Tae-Ho Kim; Sang Un Kim; Duk Man Yu; Young Taik Hong
Macromolecular Chemistry and Physics | 2012
Duk Man Yu; Kyungseok Yoon; Young Jun Yoon; Tae-Ho Kim; Jang Yong Lee; Young Taik Hong
International Journal of Hydrogen Energy | 2012
Young Jun Yoon; Tae-Ho Kim; Duk Man Yu; Young Taik Hong
International Journal of Hydrogen Energy | 2012
Young Jun Yoon; Tae-Ho Kim; Duk Man Yu; Ji Young Park; Young Taik Hong