Professor of Chemical Engineering

Research Areas

Advanced Electrochemical Systems

Research Interests

NANO-ELECTRODES FOR ENERGY DEVICES (Super-capacitors / Batteries / Fuel cells) & ELECTROCHEMICAL SENSORS
We have manufactured nanoelectrodes of metals or metal-oxides, on which the nano-particles and bump-typed or needle-shaped dendrite structures exist. These extremely high surface area nano-porous electrodes have been fabricated by the unique electroplating process on dynamic hydrogen-bubble template or the spontaneous galvanic displacement reactions. Using these nano-electrodes, we have developed the energy devices such as super-capacitors, secondary batteries, and fuel cells for the next-generation energy storage and conversion system. The electrochemical sensors are also developed using nano-materials such as nanotubes, nanowires, and nanofoams. They are of benefit in electrochemical sensors for gases and biomaterials detection.

FUNDAMENTAL STUDY ON ELECTROCHEMICAL REACTION MECHANISM
The surface reaction mechanisms of electrochemical processes are investigated using in-situ Fourier-transform infrared spectroscopy and other electrochemical analyses. The electrochemical reaction is characterized and optimized by monitoring the behavior of electrodes and electrolytes in electroplating, fuel cells, supercapacitors, metal ion batteries, and other energy devices.

Selected Publications

1. “Dendritic Ni(Cu)–polypyrrole hybrid films for a pseudo-capacitor”, Nanoscale, 7, 18561-18569 (2015).

2. “Surfactant Effects on the Morphology and Pseudocapacitive Behavior of V2O5⋅H2O”, ChemSusChem, 8, 2399-2406 (2015)

3. “A dendritic palladium electrode for a hydrogen peroxide sensorfabricated by electrodeposition on a dynamic hydrogen-bubbletemplate and dealloying”, Sensors and Actuators B, 213, 329-333 (2015)

4. “Fabrication of a Three-electrode Battery using Hydrogen-storage Materials”, Journal of Power Sources, 280, 125-131 (2015)

5. “Morphological variation of highly porous Ni-Sn foams fabricated by electrodeposition in hydrogen-bubble templates and their performance as pseudo-capacitors”, Applied Surface Science, 322, 15-20 (2014)

Professional Experience

겸임교수/방문교수 (University of New Mexico, 2005-2007)
박사후 연구원 (University of California, Santa Barbara, 1995-1997)