A5102803257- Fuel Cells and Related Materials
- Advanced battery technologies research
- Membrane-based Ion Separation Techniques
- Electrocatalysts for Energy Conversion
- Electrical and Thermal Properties of Materials
- CO2 Reduction Techniques and Catalysts
- Ionic liquids properties and applications
- Conducting polymers and applications
- Extraction and Separation Processes
- Membrane Separation and Gas Transport
- Transition Metal Oxide Nanomaterials
- Chemical Synthesis and Characterization
- Analytical Chemistry and Sensors
- Perovskite Materials and Applications
- Glass properties and applications
- Silk-based biomaterials and applications
- Ferroelectric and Piezoelectric Materials
- Synthetic Organic Chemistry Methods
- Luminescence Properties of Advanced Materials
- Magnetic confinement fusion research
- Photorefractive and Nonlinear Optics
- Dielectric properties of ceramics
- Acoustic Wave Resonator Technologies
- Gas Sensing Nanomaterials and Sensors
- Antimicrobial Peptides and Activities
Rensselaer Polytechnic Institute
2017-2024
Xi’an University of Posts and Telecommunications
2021-2023
Government of the United States of America
2022
Los Alamos National Laboratory
2022
University of Delaware
2022
Northeastern University
2018
Dalian Jiaotong University
2016
China University of Geosciences (Beijing)
2015
China University of Geosciences
2015
Anomalously large interface charge in polarity-switchable photovoltaic devices indicates the amount of mobile ions organic–inorganic halide perovskites.
Elastomeric anion exchange membranes (AEMs) were prepared by acid-catalyzed Friedel–Crafts alkylation of the polystyrene block polystyrene-b-poly(ethylene-co-butylene)-b-polystyrene (SEBS) using bromoalkylated tertiary alcohols and triflic acid as a catalyst, followed amination with trimethylamine. This simple one-step bromoalkylation allowed convenient control both degree functionalization cation tether length changing molar ratio structure alcohol. The resulting quaternary...
A series of membranes based on carboxylated polystyrene-b-poly(ethylene-ran-butylene)-b-polystyrene (SEBS) were synthesized via Friedel–Crafts bromoalkylation, substitution with malonate esters, and heterogeneous ester hydrolysis. The physicochemical properties the obtained membranes, including electrolyte uptake, swelling ratio, ionic conductivity, highly affected by degree functionalization concentration aqueous KOH solution. Membranes degrees higher than 100% suffered from excessive poor...
Performing carbon monoxide reduction in membrane electrode assembly configuration (MEA) is critical to achieving a high reaction rate while reducing cell resistance. Most studies examine the role of cathode on product selectivity and stability, comparatively little attention has been given impact performance. This study demonstrates that properties such as water uptake, ion-exchange capacity, functional groups alter liquid selectivity. Interestingly, we show ethanol crossover conjunction...
Proton exchange membrane (PEM) capable of working over a broad operating condition window is critical for successful adoption PEM-based electrochemical devices. In this work, phosphoric acid (PA)-doped biphenyl-backbone ion-pair coordinated PEMs were prepared by quaternization BPBr-100, precursor polymer, with three different tertiary amines including trimethylamine, 1-methylpiperidine, and 1,2-dimethylimidazole followed casting, ion reaction to hydroxide ion, doping PA. The resulting...
Introduction of a bromoalkyl group to aromatic polymers is widely applied for the preparation anion exchange membranes (AEMs), as tethered bromide moiety can be conveniently converted various ionic groups. We recently reported polymer modification method by Friedel–Crafts alkylation using bromoalkylated tertiary alcohols and triflic acid catalyst. Although synthetic allowed convenient control tether length ion degree functionalization changing structure molar ratio alcohol, reaction requires...
Anion exchange membrane (AEM) is a key material component of many electrochemical devices, such as fuel cells and electrolyzers. However, its relatively low hydroxide conductivity insufficient long-term chemical mechanical stabilities have been major barriers to the wider adoption AEM-based technologies. To address those issues, various synthetic approaches explored with aim increasing ion capacity introducing cross-linkers within membrane. These approaches, however, typically require...
ABSTRACT Polymers containing CO 2 ‐philic groups are of great interest for /light gas separation membranes because the affinity toward can effectively increase solubility and thus permeability. In this study, polysulfones (PSUs) modified with different degrees benzyldimethylamine (DMA), benzyltrimethylammonium fluoride (TMAF), iodide (TMAI) were synthesized using sequential post‐functionalization reactions investigated /N /CH 4 separation. The physical properties these polymers studied,...
Silk is a natural fiber that surpasses most man-made polymers in its combination of strength and toughness. fibroin, the primary protein component silk, can be synthetically mimicked by linear copolymer with alternating rigid soft segments. Strategies for chemical synthesis such silk-like have persistently resulted poor sequence control, long reaction times, low molecular weights. Here, we present two-stage approach rapidly synthesizing precisely defined blocks. This utilizes solid-phase...
Abstract Polymeric membrane‐based gas separation technology has significant advantages compared with traditional amine‐based CO 2 method. In this work, SEBS block copolymer is used as a polymer matrix to incorporate triethylene oxide (TEO) functionality. The short ethylene segment chosen avoid crystallization, which confirmed by differential scanning calorimetry and wide‐angle X‐ray scattering characterizations. permeability results reveal that /N selectivity increased increasing content of...
Polystyrene-b-poly(ethylene-co-butylene)-b-polystyrene (SEBS) based anion exchange membranes (AEMs) were synthesized via Friedel-Crafts alkylation on the polystyrene block using a bromoalkylated tertiary alcohol and trifluoromethanesulfonic acid catalyst. This simple one-step bromoalkylation following quaternization of aromatic polymer allowed to control ion capacity (IEC) cation tether length conveniently by changing amount structure substrate. A series SEBS-based AEMs with different...
Recently, large language models (LLMs) have demonstrated remarkable capabilities in a wide range of tasks. Typically, an LLM is pre-trained on corpora and subsequently fine-tuned task-specific datasets. However, during fine-tuning, LLMs may forget the knowledge acquired pre-training stage, leading to decline general capabilities. To address this issue, we propose new fine-tuning algorithm termed Momentum-Filtered Optimizer (MoFO). The key idea MoFO iteratively select update model parameters...
Fuel cell has been recognized as a promising electrochemical device attributed to its high energy efficiency and zero CO 2 emission. As an essential component of fuel cell, currently the most widely used proton exchange membrane (PEM), Nafion ® , operates only at low temperature (<100 ˚C) relative humidity (>80% RH). Although phosphoric acid (PA)-doped polybenzimidazole membranes have reported offer good conductivity temperatures 140–180 ˚C, they suffer from severe performance...
A new post-functionalization method of polystyrene (PS) block polystyrene- b -poly(ethylene- co -butylene)- -polystyrene (SEBS) is presented. Due to good chemical stability backbone in alkaline condition, elastic mechanical property, nanoscale phase separation morphology, and commercial availability, SEBS a promising candidate for preparation anion exchange membranes (AEMs). Chloromethylation, the most frequently used reaction AEM synthesis, PS generally results low levels functionalization...
Abstract Electrocatalytic conversion of carbon monoxide (CO) is being actively developed as a key component for tandem CO 2 electrolysis. Significant effort has been devoted to engineering reduction electrocatalysts better multi-carbon product selectivity. However, less attention paid other performance parameters, such liquid concentration and purity, which are crucial commercializing Here, we present an “internally coupled purification” strategy substantially improve the acetate purity in...
Improving the electrochemical stability of proton exchange membranes is a pressing priority for heavy-duty fuel cell vehicles. The lifetime most widely used perfluorosulfonic acid limited by reactive free radicals generated inside system. Cerium has been found to reduce chemical degradation membranes. However, cerium migration during operation limits durability enhancement effect expected from radical scavenging activity cerium. Here we investigate wide range organic immobilizers cerium,...