A5047048761- Fuel Cells and Related Materials
- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- Membrane-based Ion Separation Techniques
- Advanced Battery Materials and Technologies
- Conducting polymers and applications
- Advanced Battery Technologies Research
- Supercapacitor Materials and Fabrication
- Advancements in Solid Oxide Fuel Cells
- Hybrid Renewable Energy Systems
- Membrane Separation and Gas Transport
- Dielectric materials and actuators
- Ionic liquids properties and applications
- Electrochemical Analysis and Applications
- Synthesis and properties of polymers
- Chemical Synthesis and Reactions
- Analytical Chemistry and Sensors
- CO2 Reduction Techniques and Catalysts
- Silicone and Siloxane Chemistry
- Advancements in Battery Materials
- Carbohydrate Chemistry and Synthesis
- biodegradable polymer synthesis and properties
- Perovskite Materials and Applications
- Covalent Organic Framework Applications
- Hydrogen Storage and Materials
Korea University of Science and Technology
2016-2025
Korea University
2017-2025
Korea Institute of Science and Technology
2016-2025
Korean Association Of Science and Technology Studies
2024
University of Science and Technology
2015-2022
Government of the Republic of Korea
2014-2020
Caerus Molecular Diagnostics (United States)
2019
Concordia University
2019
Virginia Commonwealth University
2019
Wuhan University
2019
Abstract One promising way to store and distribute large amounts of renewable energy is water electrolysis, coupled with transport hydrogen in the gas grid storage tanks caverns. The intermittent availability renewal makes it difficult integrate established alkaline electrolysis technology. Proton exchange membrane (PEM) (PEMEC) promising, but limited by necessity use expensive platinum iridium catalysts. expected solution anion (AEM) which combines cheap abundant catalyst materials...
New and emerging technologies for electrochemical energy conversion processes challenging separations have been major drivers the tremendous development of new polybenzimidazole chemistries materials in recent years.
We have investigated the release of active sites blocked by bubbles attached on surface catalysts during oxygen evolution reaction (OER) in alkaline water electrolysis, via modulation wetting properties four different morphologies a nickel catalyst.
15, 25, and 35 μm thick meta-polybenzimidazole (PBI) membranes are doped with H2SO4 tested in a vanadium redox flow battery (VRFB). Their performances compared those of Nafion membranes. Immersed 2 M H2SO4, PBI absorbs about mol per mole repeat unit. This results low conductivity voltage efficiency (VE). In ex-situ tests, meta-PBI shows negligible crossover V3+ V4+ ions, much lower than that Nafion. is due to electrostatic repulsive forces between cations positively charged protonated...
Ionically crosslinked PBI/sulfonated polysulfone blend membranes are covalently by thermal curing. The crosslinking unit is an aromatic sulfone group.
Polybenzimidazole (PBI) has been considered as promising membrane material for all-vanadium redox flow batteries (VRFBs) due to its compact morphology that can hinder vanadium crossover. However, 2–4 mS cm−1 proton conductivity remains a challenge achieve high energy efficiency. Recently developed PBI membranes showed up 18 by pre-treatment with phosphoric acid (PA) and 56 KOH. since the operation of VRFB uses sulfuric (SA), different chemicals generates chemical wastes. Here we investigate...
Cheap, efficient water electrolysis with non-platinum catalysts is the key to a fossil fuel-free future. Highly conductive, mechanically strong separators are essential components.
Abstract Polybenzimidazole has been widely examined as a separator for vanadium redox flow batteries (VRFBs) due to its low permeability. Its conductivity can be tackled by combining 1–4 µm thin dense PBI layers with highly conductive mechanically supporting layers, either lamination or loose stacking. While gel‐PBI is very soft and conductive, the shadow effect of non‐conductive pore walls porous supports adds resistance. In this work, these issues are addressed coating 25 thick sulfonated...
Abstract A series of methyl, benzyl, and mixed polybenzimidazolium halides was synthesised characterised by NMR spectroscopy. Membranes were formed ion exchanged with hydroxides. These membranes are interest for use in potentially platinum‐free anionic exchange membrane fuel cells. Crosslinked obtained the addition α,α′‐dibromo‐ p ‐xylene to casting solution. The conductivity determined impedance hydroxide 29 mS · cm −1 at 26 °C 58 60 obtained. thermal hydrolytic stability investigated a...