A5048348077- Fuel Cells and Related Materials
- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- Supercapacitor Materials and Fabrication
- Conducting polymers and applications
- Korean Urban and Social Studies
- Photonic Crystals and Applications
- Psychosocial Factors Impacting Youth
- Advanced Battery Materials and Technologies
- Advancements in Solid Oxide Fuel Cells
- Advanced Photocatalysis Techniques
- Silicone and Siloxane Chemistry
- Luminescence Properties of Advanced Materials
- Synthesis and Characterization of Heterocyclic Compounds
- Hydrogen Storage and Materials
- Advancements in Battery Materials
- Hybrid Renewable Energy Systems
- Rural development and sustainability
- Environmental Education and Sustainability
- Organic Light-Emitting Diodes Research
- Luminescence and Fluorescent Materials
- Plasmonic and Surface Plasmon Research
- Ammonia Synthesis and Nitrogen Reduction
- Ginseng Biological Effects and Applications
- Family Support in Illness
Korea Naval Academy
2016-2025
Seoul National University
2010-2015
Institute for Basic Science
2013-2015
Changwon National University
2015
Chonnam National University
2013
Peking University
2013
Korea Institute of Toxicology
2004-2005
Oregon State University
1997
Kyungpook National University
1995
National Institute of Standards and Technology
1991
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...
Heteroatom‐doped porous carbon materials have attracted much attention because of their extensive application in energy conversion and storage devices. Because the performance fuel cells rate capability supercapacitors depend significantly on multiple factors, such as electrical conductivity transport ions reactants, designing these carbon‐based to optimize factors is vital. In order address issues, alveoli that possess a hollow cavity where oxygen exchange can occur are synthesized,...
Proton exchange membrane fuel cells (PEMFCs) are an alternative clean energy source and they attracting increased attention. However, several limitations such as degradation of the carbon support Nafion ionomer in cathode electrode must be overcome for practical applications PEMFCs. Support‐free 1D‐ordered intermetallic nanotubes (NTs) considered promising candidates highly active durable catalysts 1D difficult to produce at large scale because have generally been synthesized using a...
We demonstrate the use of a supercritical fluid treatment for creating ionomer nanodispersions fuel cell cathodes.
Abstract Although numerous reports on nonprecious metal catalysts for replacing expensive Pt-based have been published, few of these studies demonstrated their practical application in fuel cells. In this work, we report graphitic carbon nitride and nanofiber hybrid materials synthesized by a facile gram-scale method via liquid-based reactions, without the use toxic or high pressure-high temperature reactor, as cell cathodes. The resulting exhibited remarkable methanol tolerance, selectivity...
In spite of their high conversion efficiency and no emission greenhouse gases, polymer electrolyte membrane fuel cells (PEMFCs) suffer from prohibitively cost insufficient life-span core component system, the electrode assembly (MEA). this paper, we are proposing Ti foam as a promising alternative material in MEA. Indeed, it showed current density 462 mA cm–2, being ca. 166% higher than that with baseline Toray 060 gas diffusion layer (GDL) (278 cm–2) 200 ccm oxygen supply at 0.7 V, when...
The Fe–N–C-based carbon materials, which are generally formed by high-temperature annealing, have been highlighted as a promising alternative to expensive Pt electrocatalysts for oxygen reduction reaction. However, the delicate formation of active sites remains an issue because decomposition and transformation macrocycle during heat treatment. Accordingly, we developed low-temperature gram-scale approach synthesizing iron phthalocyanine (Pc)-embedded two-dimensional sheets annealing at 450...
Investigation of the anode porous transport layer (PTL) is crucial for commercialization anion-exchange membrane water electrolysis (AEMWE). Recently, nickel foam (Ni-foam) has been employed as an alternative to conventional titanium-based PTL (Ti-felt) and strategies improve its performance durability have developed. However, few studies investigated effect pore structures in Ni-foam applications other Ni-based PTLs not reported. In this study, two with different structures, felt (Ni-felt),...
Ionic resistance and double layer capacitance of catalyst (CL) variations with the thickness cathode CL were estimated by electrochemical impedance spectroscopy (EIS) using modified transmission-line model (TLM). 0.1–0.4 mgPt cm−2 commercial 20, 40, 60 wt% Pt/C catalysts used to control thicknesses. The a low Pt C ratio was favorable for maximum power density when loaded ≤0.2 cm−2, high loading ≥0.3 cm−2. surface areas different, whereas utilization these similar. Modified TLM under...
The phosphorescent Ir(III) complexes were modified by allylation and consecutive hydrosilylation, covalently incorporated into the silica nanoparticles hydrolysis condensation reaction with TEOS. These showed an excellent photochemical thermal stability, a very high luminescent efficiency due to blocking of O2 quenching suppression energy transfer through amorphous solid solution. limited mobility in matrix also resulted decrease vibration relaxation restrained nonradiative decay. It is...