A5004266985- Electrocatalysts for Energy Conversion
- Fuel Cells and Related Materials
- Advanced battery technologies research
- Supercapacitor Materials and Fabrication
- Advancements in Battery Materials
- Conducting polymers and applications
- Advanced Battery Materials and Technologies
- Advancements in Solid Oxide Fuel Cells
- Advanced Battery Technologies Research
- Catalytic Processes in Materials Science
- Advanced Sensor and Energy Harvesting Materials
- Advanced Photocatalysis Techniques
- Hybrid Renewable Energy Systems
- Extraction and Separation Processes
- Electric and Hybrid Vehicle Technologies
- CO2 Reduction Techniques and Catalysts
- Electrochemical Analysis and Applications
- Additive Manufacturing and 3D Printing Technologies
- Nuclear Materials and Properties
- Graphene research and applications
- Corrosion Behavior and Inhibition
- Ammonia Synthesis and Nitrogen Reduction
- Advanced biosensing and bioanalysis techniques
- Electrospun Nanofibers in Biomedical Applications
- Advanced Materials and Mechanics
Korea Research Institute of Ships and Ocean Engineering
2021-2024
Korea University of Science and Technology
2021-2024
Korean Register (South Korea)
2023
University of Science and Technology
2023
Seoul National University
2015-2021
Institute for Basic Science
2015-2021
Seoul Institute
2018-2020
Government of the Republic of Korea
2020
Korea Naval Academy
2019
University of Ulsan
2012
CO poisoning of Pt catalysts is one the most critical problems that deteriorate electrocatalytic oxidation and reduction reactions taking place in fuel cells. In general, enhancing properties by tailoring electronic structure (electronic effect) or increasing amount supplied oxygen species (bifunctional effect), which typical reactant for oxidation, has been performed to remove from surface. However, though there have a few reports about understanding effect rapid separate bifunctional...
Nitrogen-doped porous carbon materials have been highlighted as promising alternatives to high-cost platinum in various electrochemical energy applications. However, protocols generate effective pore structure are still challenging, which hampers mass production and utilization of materials. Here, we suggest a facile method for hierarchical by single-step carbonization coffee waste (CW) with ZnCl2. The CW, is one the most earth-abundant organic waste, can be successfully converted...
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...
A breakthrough utilizing an anionic redox reaction (O
Ordered mesoporous carbon–carbon nanotube (OMC–CNT) nanocomposites were prepared and used as catalyst supports for polymer electrolyte fuel cells. The OMC–CNT composites synthesized via a nanocasting method that ordered silica template Ni–phthalocyanine carbon source. For comparison, sucrose phthalocyanine to generate two other OMCs, OMC(Suc) OMC(Pc), respectively. All three carbons exhibited hexagonally mesostructures uniform mesopores. Among the showed highest electrical conductivity,...
Abstract Lithium-sulphur batteries are under intense research due to the high specific capacity and low cost. However, several problems limit their commercialization. One of them is insulating nature sulphur, which necessitates a large amount conductive agent binder in cathode, reducing effective sulphur load as well energy density. Here we introduce redox mediator, cobaltocene, acts an electron transfer between surface polysulphides electrolyte. We confirmed that cobaltocene could...
Biomass-derived carbon, as a low-cost material source, is an attractive choice to prepare carbon materials, thus providing alternative by-product and waste management. Herein, we report the preparation of from hemp stem biomass precursor through simple, low-cost, environment-friendly method with using steam activating agent. The hemp-derived hierarchically porous structure partial graphitization in amorphous domains was developed, for first time, it applied anode lithium-ion battery. Natural...
Micro/meso-porous Bi@C nanoplates are synthesized by pyrolyzing Bi-based MOFs prepared a microwave-assisted hydrothermal method to overcome huge volume expansion and pulverization of anode materials during battery operation.
There is a growing demand for research and development of advanced energy storage devices with high density utilizing earth-abundant metal anodes such as sodium metal. Tellurium, member the chalcogen group, stands out promising cathode material due to its remarkable volumetric capacity, comparable sulfur, significantly electrical conductivity. However, critical issues arise from soluble polytellurides, leading shuttle effect. This phenomenon can result in loss active materials,...
Integrated with heat-generating devices, a Li-ion battery (LIB) often operates at 20-40 °C higher than the ordinary working temperature. Although macroscopic investigation of thermal contribution has shown significant reduction in LIB performance, molecular level structural and chemical origin aging mild environment not been elucidated. On basis combined experiments electrochemical measurements, Cs-corrected electron microscopy, situ analyses, we herein provide operando insights on how...