Hyunuk Kim
Hyunuk Kim is the Chief of the hydrogen convergence materials laboratory at Korea Institute of Energy Research and a professor of Energy Engineering at Korea University of Science and Technology. He received Ph.D. in inorganic chemistry (2009) from POSTECH working with Prof. Kimoon Kim. After a postdoctoral stay with Prof. Robert M. Waymouth at Stanford University, He started his independent career at KIER in 2012. In 2014, he was appointed as a professor at Korea University of Science and Technology. More than 110 peer-reviewed papers have been published in JACS, Angewandte Chemie, ACS Appl. Mater. Interfaces and other journals. His current research focuses on developing metal-organic hybrid materials for gas adsorption and separation, energy storage and catalysis.
Presentation title: Gas and Energy Storage Using Metal-Organic Frameworks
Abstract: Metal-organic frameworks (MOFs) are an emerging field with a rapid growth of the number of publications over the past 10 years. MOFs have drawn special attention because of their potential in many areas including separation, catalysis, and gas storage and energy storage. In this workshop, I will present advancements in gas and energy storage using MOFs. Isostructural [M2(DOBDC)(EG)2] (M=Mg, Co, Ni) frameworks are first synthesized by controlling the pH* in the reaction medium. Coordinated ethylene glycols form a hexagonal OH cluster, which works as a template to grow single-crystals with high crystallinity. After the liberation of solvated molecules, [M2(DOBDC)] shows notably higher surface areas than the reported values and completely different CO2 and CO separation properties depending on the kinds of unsaturated metal. To reveal the role of unsaturated metal sites, CO2 and CO adsorption sites are unequivocally determined by single-crystal X-ray diffraction analysis. This observation provides new insight into the synthesis of novel functional materials with high CO2/CO separation performance. Our exploration extends beyond gas storage; we have ventured into leveraging MOFs as electrode materials. Through laser pyrolysis of [Ni2(DOBDC)(EG)2], we rapidly engineer precisely controlled Ni nanoparticles/carbon. The quenching rate significantly impacts the structural disorder, size, and homogeneity of these nanoparticles. Remarkably, Ni (5.5nm)@carbon demonstrates an exceptional specific capacitance of 925 F/g, coupled with unparalleled cyclic stability, attributed to the formation of redox-active α-Ni(OH)2. We believe that the laser-based electrode synthesis have a great deal of potential as energy storage electrodes.