A5051789763- Fuel Cells and Related Materials
- Electrocatalysts for Energy Conversion
- Synthesis and properties of polymers
- 3D IC and TSV technologies
- Copper Interconnects and Reliability
- Semiconductor materials and devices
- Advanced Battery Materials and Technologies
- Electronic Packaging and Soldering Technologies
- Advanced battery technologies research
- Conducting polymers and applications
- Silicone and Siloxane Chemistry
- Advancements in Battery Materials
- Membrane-based Ion Separation Techniques
- Semiconductor Lasers and Optical Devices
- Advanced MEMS and NEMS Technologies
- Photonic and Optical Devices
- Advanced Sensor and Energy Harvesting Materials
- Nanofabrication and Lithography Techniques
- Epoxy Resin Curing Processes
- Ionic liquids properties and applications
- Advanced Battery Technologies Research
- Hybrid Renewable Energy Systems
- Analytical Chemistry and Sensors
- Electrodeposition and Electroless Coatings
- Photopolymerization techniques and applications
Georgia Institute of Technology
2016-2025
Sandia National Laboratories
2024
Philadelphia Water Department
2022
AID Atlanta
2014-2020
Caerus Molecular Diagnostics (United States)
2018
Concordia University
2018
Virginia Commonwealth University
2018
Wuhan University
2018
Beijing University of Chemical Technology
2018
University of Atlanta
2011
A detailed perspective on the use of anion-exchange membranes in fuel cells, electrolysers, flow batteries, reverse electrodialysis, and bioelectrochemical systems.
Abstract The primary function of the ionomers that are incorporated into fuel cell electrode catalyst layers is to provide pathways for ion transport between active sites and electrolyte. This influenced by many variables, including ion‐exchange capacity, water uptake, molecular weight. In anion exchange membrane cells (AEMFCs), controlling ionomer uptake particularly important tailoring this property in each an consideration when looking maximize performance. study, three poly(norbornene)...
Alkaline fuel cells and electrolyzers are of interest because they have potential advantages over their acid counterparts. High-conductivity anion conducting membranes were analyzed used in alkaline hydrogen/oxygen cells. The composed reinforced block copolymers poly(norbornenes) with pendant quaternary ammonium head-groups. It was found that light cross-linking provided excellent mechanical stability allowed very high ion exchange capacity polymers to be without penalty excessive water...
High ionic conductivity membranes can be used to minimize ohmic losses in electrochemical devices such as fuel cells, flow batteries, and electrolyzers. Very high hydroxide was achieved through the synthesis of a norbornene-based tetrablock copolymer with an ion-exchange capacity 3.88 meq/g. The were cast thin polymer reinforcement layer lightly cross-linked N,N,N',N'-tetramethyl-1,6-hexanediamine. norbornene had 212 mS/cm at 80°C. Light cross-linking helped control water uptake provide...
Abstract Embedded capacitor technology can increase silicon packing efficiency, improve electrical performance, and reduce assembly cost compared with traditional discrete technology. Developing a suitable material that satisfies electrical, reliability, processing requirements is one of the major challenges incorporating capacitors into printed wiring board (PWB). Polymer–ceramic composites have been great interest as embedded because they combine processability polymers high dielectric...
A novel hybrid fuel cell is described using at least one electrode operating high pH in an effort to use the conductivity of Nafion and exploit electrochemical advantages high-pH operation. The behavior a anion exchange membrane (AEM)/proton (PEM) junction corresponding are presented. Two AEM/PEM junctions cells have been evaluated: AEM anode/PEM cathode PEM anode/AEM cathode. cathode/PEM configuration causes proton−hydroxide recombination junction, resulting self-hydration membrane....
Single crystal semiconductors (n‐Si, p‐Si, , and ) were coated with n‐type by a chemical vapor deposition technique, the electron hole transfer properties across heterojunction so produced investigated. The quality of deposited film depended upon several factors including temperature substrate material. When high crack‐free coats obtained on substrates, was stabilized no dissolution during photo‐oxidation water. However, oxidation due only to photoexcitation the, any holes in not transferred...
Cross-linked (XL) anion-exchange membranes (AEMs) synthesized by vinyl addition polymerization of norbornene were prepared for use in membrane electrochemical devices, including fuel cells and electrolyzers. Tetrablock copolymers composed an all-hydrocarbon backbone with a very high ion-exchange capacity (IEC), 3.46 mequiv/g, synthesized. Light cross-linking was found to be adequate providing critical control over unwanted water uptake. This enabled IEC membranes. Without light...
A systematic comparison between random and block copolymer membrane properties showed the suitability of membranes.
A series of cross-linked (XL) anion-exchange membranes (AEMs) were synthesized on the basis ring opening metathesis polymerization (ROMP) norbornene monomers (rPNB). Poly(bromopropyl norbornene)-block-poly(butyl norbornene) diblock copolymers and poly(bromopropyl homopolymers have an all-hydrocarbon backbone a high ion-exchange capacity (IEC), up to 4.73 mequiv/g. N,N,N′,N′-Tetramethyl-1,6-hexanediamine (TMHDA) was used as cross-linking agent control water uptake mechanical instability. The...
Higher energy density batteries are desired, especially for mobile electronic devices. Lithium metal anodes a possible route to achieving high and power due their light weight compared current graphite anodes. However, whisker growth during lithium electrodeposition (i.e. charging) represents serious safety efficiency concern both overcharging of in lithium-ion batteries. The initial morphology deposited nuclei can have significant impact on the bulk material deposited. nucleation from an...
Two ionic liquids, EMI-AlCl4 and N1114-TFSI, that support both lithium sodium deposition/dissolution were studied as potential electrolytes for metal batteries. In cases, lithium's dendritic growth was suppressed by adding a small amount of to electrolyte. This results in co-deposition or alloying process hinders dendrite growth. SEM images show significant difference morphology obtained the addition sodium. A smooth deposit not enough stable cycling anode because reactivity with Vinylene...
Throughout the past four decades, semiconductor technology has advanced at exponential rates in both productivity and performance. In recent years, multilevel interconnect networks have become primary limit on productivity, performance, energy dissipation, signal integrity of gigascale integration. Consequently, a broad spectrum novel solutions to multifaceted problem must be explored. Here we review salient results this exploration. Based upon prediction complete stochastic length...
The photoelectrochemical oxidation and dissolution of silicon has been investigated in the absence water oxygen. etch rate photocurrent for n‐Si an anhydrous, solution were directly proportional to light intensity. Four electrons transferred per oxidized, with a quantum yield greater than 3.3 due electron injection. anodic p‐Si, as Si(IV) without gas at up 1.4 A/cm2, yielded novel porous structure which exhibited electroluminescence photoluminescence. Noninterconnected pores formed...
Within the microelectronics industry, there is an ongoing trend toward miniaturization coupled with higher performance. High glass-transition temperature polynorbornenes exhibit many of key performance criteria necessary for these demanding applications. However, homopolynorbornene exhibits poor adhesion to common substrate materials, including silicon, silicon dioxide, aluminum, gold, and copper. In addition, this homopolymer extremely brittle, yielding less than 1% elongation-to-break...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSemiconductor electrodes. 13. Characterization and behavior of n-type zinc oxide, cadmium sulfide, gallium phosphide electrodes in acetonitrile solutionsP. A. Kohl J. BardCite this: Am. Chem. Soc. 1977, 99, 23, 7531–7539Publication Date (Print):November 1, 1977Publication History Published online1 May 2002Published inissue 1 November 1977https://doi.org/10.1021/ja00465a023RIGHTS & PERMISSIONSArticle Views848Altmetric-Citations96LEARN ABOUT THESE...