A5016313209- Fuel Cells and Related Materials
- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- Electrochemical Analysis and Applications
- Supercapacitor Materials and Fabrication
- Advancements in Battery Materials
- Catalytic Processes in Materials Science
- Conducting polymers and applications
- Advancements in Solid Oxide Fuel Cells
- Advanced Battery Materials and Technologies
- Hybrid Renewable Energy Systems
- Advanced Battery Technologies Research
- Extraction and Separation Processes
- Hydrogen Storage and Materials
- Membrane-based Ion Separation Techniques
- Advanced Photocatalysis Techniques
- TiO2 Photocatalysis and Solar Cells
- CO2 Reduction Techniques and Catalysts
- Semiconductor materials and devices
- Skin Protection and Aging
- Insect Utilization and Effects
- nanoparticles nucleation surface interactions
- Machine Learning in Materials Science
- Transition Metal Oxide Nanomaterials
- Catalysis and Hydrodesulfurization Studies
Kangwon National University
2016-2025
Institute for Basic Science
2021-2024
Government of the Republic of Korea
2015-2021
Daegu University
2016-2017
Kookmin University
2010-2015
Daegu Haany University
2014
Pukyong National University
2014
Seoul National University
2006-2009
Ultra-stable Pt cathode catalysts in ultra-low loading proton exchange membrane fuel cells were synthesized by facile carbon encapsulation.
Iron- and nitrogen-doped carbon (Fe–N–C) materials have been suggested as the most promising replacement for Pt-based catalysts in oxygen reduction reaction (ORR) owing to FeN4 active moiety. Based on relationship between binding energy catalytic activity, Fe–N–C has a very strong energy; hence, hard desorb final intermediate of *OH. Herein, we provide an effective method tuning moiety using phosphine-gas treatment Fe–N–C. Combined analyses experimental computational results reveal that...
An earth-abundant and feasible air cathode electrocatalyst is of importance for energy devices including fuel cells metal–air batteries. Herein, hierarchically porous S,N-co-doped carbon materials derived from bamboo are prepared via pyrolysis thiourea to function as oxygen reduction reaction electrocatalysts. Due their controlled mesopore ratio increased effective dopant amount, the carbons (SNBCs) present half-wave potentials stabilities comparable those commercial Pt/C catalysts. As anion...
Tin oxide-based materials, operating via irreversible conversion and reversible alloying reaction, are promising lithium storage materials due to their higher capacity. Recent studies reported that nanostructured SnO2 anode provides capacity beyond theoretical based on the reaction mechanism; however, exact mechanism remains still unclear. Here, we report detailed of an ordered mesoporous electrode material. Synchrotron X-ray diffraction absorption spectroscopy reveal some portion Li2O...
The design of high-performance and durable electrodes for the oxygen evolution reaction (OER) is crucial anion-exchange membrane water electrolyzers (AEMWE). Herein, a three-dimensional unified electrode in which nickel–iron oxyhydroxide (NiFeOOH) directly electrodeposited on gas diffusion layer (GDL) developed as an AEMWE anode. Unlike conventional with separate catalyst GDL, comprises single component integrating GDL. resulting shows higher catalytic activity than based commercial NiFe...
We report Pt-based alloys with early transition metals. Significant electrocatalysis occurs during oxygen reduction reaction (ORR) at the Pt–Y alloy electrodes, and extent depends on composition. The electrode activity is related to d-band center position, lattice strain stability for reaction.
We demonstrate the use of a supercritical fluid treatment for creating ionomer nanodispersions fuel cell cathodes.
Abstract We have achieved performance enhancement of polymer electrolyte membrane fuel cell (PEMFC) though crack generation on its electrodes. It is the first attempt to enhance PEMFC by using cracks which are generally considered as defects. The pre-defined, cracked electrode was generated stretching a catalyst-coated Nafion membrane. With strain-stress property that unique in aspect plastic deformation, assembly (MEA) successfully incorporated into cell. Cracked electrodes with variation...
Abstract Guided cracks were successfully generated in an electrode using the concentrated surface stress of a prism-patterned Nafion membrane. An with guided was formed by stretching catalyst-coated The morphological features stretched membrane assembly (MEA) investigated respect to variation prism pattern dimension (prism pitches 20 μm and 50 μm) applied strain ( S ≈ 0.5 1.0). behaviour water on cracked examined environmental scanning electron microscopy. layer shown be efficient reservoirs...
Nitrogen-doped carbon-encapsulated non-noble metals are promising electrocatalytic alternatives to Pt for the oxygen reduction reaction (ORR).
With increasing hydrogen demand, the development of a low-cost and high-performance anion-exchange membrane water electrolysis (AEMWE) stack is crucial. Here, two AEMWE models using all non-noble metal-based components were developed. Three electrode assembly─a porous transport layer (PTL), an oxygen evolution reaction (OER) catalyst, (HER) catalyst─were examined to be substituted for metal. The results revealed that stainless steel felt carbon paper anode cathode PTLs, respectively,...