A5103180018- Fuel Cells and Related Materials
- Advanced battery technologies research
- Electrocatalysts for Energy Conversion
- Membrane-based Ion Separation Techniques
- Conducting polymers and applications
- Hybrid Renewable Energy Systems
- Advanced Battery Materials and Technologies
- Advanced Battery Technologies Research
- Energetic Materials and Combustion
- Advanced Sensor and Energy Harvesting Materials
- Thermal and Kinetic Analysis
- Rocket and propulsion systems research
Sungkyunkwan University
2019-2022
Government of the Republic of Korea
2020
Suwon Research Institute
2020
Central Salt and Marine Chemicals Research Institute
2015-2019
Academy of Scientific and Innovative Research
2015-2019
Council of Scientific and Industrial Research
2015
High Energy Materials Research Laboratory
2004
Because of a unique sandwiched structure proton and anion exchange membranes, the bipolar membrane (BPM) enables self-humidification at their junction in fuel cell operation. In this work, novel BPM was prepared from sulfonated poly(ether ether sulfone) (SPEES) acidic quaternized polysulfone (QPS) alkaline membranes via layer-by-layer process. A variety advantageous electrochemical properties associated with its were investigated under electrode assembly operation steady-state generation...
A series of hybrid proton exchange membranes were synthesized via in situ polymerization poly (2-acrylamido-2-methyl-1-propanesulfonic acid) PMPS with sulfonated (1,4-phenylene ether-ether-sulfone) (SPEES). The insertion PMPS, between the rigid skeleton SPEES plays a reinforcing role to enhance ionic conductivity. polymer was chemically characterized by fourier-transform infrared spectroscopy (FT-IR) and nuclear magnetic resonance 1H NMR demonstrate successful grafting pendent chain SPEES....
A thin layer of liner is applied to ensure a good bond between the insulator and propellant in case-bonded rocket motors. It also acts as protective shield for by providing limited fire protection effect. Liner compositions should preferably be based on same binder system used formulations. As has hold without debond under all environmental conditions, it plays key role predicted performance motor. Hence, studies were carried out improve properties using various hydroxyl compounds, such...
A series of quaternized polyphenylene oxide (QPPO) based alkaline electrolyte membranes with different degrees quaternization were synthesized via a benzyl bromination method at mild temperature (75 °C). Quite high hydroxide conductivity under the reduced water uptake and swelling was exhibited by this method. When degree measured from 1H NMR analysis 30%, corresponding ion 0.021 S cm-1. The chemical stability QPPO excellent, showing only 3% weight loss in 3 M NaOH solution during 1 month....
This present work focused on the aromatic polymer (poly (1,4-phenylene ether-ether-sulfone); SPEES) interconnected/ cross-linked with aliphatic monomer (2-acrylamido-2-methyl-1-propanesulfonic; AMPS) sulfonic group to enhance conductivity and make it flexible chain of AMPS. Surprisingly, produced higher than that other reported after chemical stability was measured. It allows optimizing synthesis electrolyte membranes tailor-made combinations stability. Membrane structure is characterized by...
A series of quaternized polysulfone (QPS)-based composite membranes containing various amounts functionalized graphitic carbon nitride (f-g-C 3 N 4 ) nanosheets were synthesized.
Anion-exchange membranes (AEMs) with high ion conductivity often encounter challenges associated excessive water uptake and dilution effects, which can impact alkaline stability mechanical properties. The preferred polymer backbone for this purpose is polystyrene-b-poly(ethylene-co-butylene)-b-polystyrene (SEBS), renowned its ether-free excellent chemical in environments. Our focus was on cross-linked SEBS (X-SEBS-BC) AEMs an environmentally friendly synthesis method the presence of SnCl4 at...
The effect of functional graphitic carbon nitride (f-g-C3N4) nano-sheets is investigated on the properties quaternized polysulfone (QPS) based composite membranes for alkaline fuel cell applications. A series QPS containing various amounts f-g-C3N4 (QPS-CNx), where x = 1 to 10, are successfully synthesized. well-interacted architecture multiple hydrophilic sites a main cause enhanced hydroxide ion conductivity membrane through forming ionic channels. QPS-CN-5 showed high 16 ~ 37 mS cm-1 from...