A5049994521- Advancements in Solid Oxide Fuel Cells
- Electronic and Structural Properties of Oxides
- Catalytic Processes in Materials Science
- High-Temperature Coating Behaviors
- Hydrogen embrittlement and corrosion behaviors in metals
- Molten salt chemistry and electrochemical processes
- Chemical Looping and Thermochemical Processes
- Metallurgical Processes and Thermodynamics
- Corrosion Behavior and Inhibition
- Fuel Cells and Related Materials
- Nuclear Materials and Properties
- Semiconductor materials and devices
- Gas Sensing Nanomaterials and Sensors
- Catalysis and Oxidation Reactions
- Environmental Policies and Emissions
- Magnetic and transport properties of perovskites and related materials
- Hydrogen Storage and Materials
- Catalysts for Methane Reforming
- Conducting polymers and applications
- Electrocatalysts for Energy Conversion
- Advanced materials and composites
- Water Quality Monitoring and Analysis
- Advanced battery technologies research
- Recycling and Waste Management Techniques
University of Connecticut
2018-2023
Clean Energy (United States)
2018-2020
Green hydrogen is essential to achieving carbon neutrality, and solid oxide electrolysis cells can produce using renewable power waste heat. Insufficient long-term durability of has impeded their commercialization. Here, coatings in the porous stainless steel support metal-supported (MS-SOECs) are used dramatically improve performance durability. The degradation rate uncoated MS-SOECs highly dependent on current density, with fastest occurring at highest density tested, 0.5 A cm–2. At this...
Traces (ppm to ppb level) of airborne contaminants such as CrO2(OH)2 and SO2 irreversibly degrade the electrochemical activity air electrodes in high-temperature devices solid oxide fuel cells by retarding oxygen reduction reactions. The use getter has been proposed a cost-effective strategy mitigate electrode poisoning. However, owing harsh operating conditions (i.e., exposure heat moisture), long-term durability materials remains considerable challenge. In this study, we report our...
The surface morphology and chemistry of oxide scales formed on select chromia-forming alumina-forming ferritic steels have been studied after exposure to a dual atmosphere hydrogen air. Localized Fe-rich nodules with whiskers/platelets form at the onset corrosion. initiation growth localized breakdown passivation are attributed presence hydrogen, inclusion iron in passivating scale, subsequent iron-rich due establishment redox (H 2 -H O) modification defect chemistry.
Electrochemical splitting of water, using solid oxide electrolysis cells (SOEC), offers an economic and efficient pathway for large-scale hydrogen production that not only utilizes renewable energy but also allows both distributed centralized to accelerate enable infrastructure mobility. In this technical contribution, two types electrochemical systems conventional oxygen ion conducting (O-SOEC) newly developed proton (P-SEOC) has been compared in terms purity, performance, stability...
PCO (Praseodymium Cerium Oxide) solid solution (0-50% PrOx) has been prepared by the conventional solid-state ceramic processing route using CeO2 and PrOx powders in desired stoichiometry sintering at 1500°C air. Synthesized powder characterized for phase chemistry lattice structure. Electrochemical characteristics of synthesized examined electrochemical impedance spectroscopy. The observed increase electrical conductivity are associated with increased concentration oxygen vacancies created...
In this study, the oxidation behavior of two ferritic steels with different amounts chromium is examined under dual atmosphere exposure conditions. Experiments varying time and temperature were carried out to understand effects these variables difference in concentration on severity morphology products. Higher alloyed steel leads better passivation against iron oxidation. With increased time, however, passivating scale breaks down leading oxide overgrowth. This phenomenon appears more...
Steam electrolyzers, utilizing molten hydroxide electrolyte, offers potential for improvement in electrochemical efficiency, cost reduction, use of conventional materials construction and process scale up large hydrogen production. Stainless steels, used the fabrication cell components (current collector, gas separator, wet seals, manifolds) experience accelerated corrosion presence electrolyte both oxidizing (anodic) reducing (cathodic) atmospheres. In this study, behavior AISI 310 316 melt...
Electrode poisoning in high temperature electrochemical systems from trace levels of airborne contaminants remains a critical issue, contributing to long-term irreversible performance degradation. The intrinsic and extrinsic presence gas phase Cr, Si, B, SO x , species air have been reported form detrimental secondary compounds microstructural changes at the electrode/electrolyte interface, consuming electrochemically active sites. Herein, novel contaminant capture method is that uses...
PCO (Praseodymium Cerium Oxide) solid solution (0-50% PrOx) has been prepared by the conventional solid-state ceramic processing of mixed CeO 2 and PrOx powders in desired stoichiometry at 1500°C air. Synthesized powder characterized for phase chemistry lattice structure. Electrochemical characteristics synthesized examined using electrochemical impedance spectroscopy. The observed increase electrical conductivity are associated with increased concentration oxygen vacancies created...
Electrochemical systems operating at elevated temperatures such as solid oxide fuel cells (SOFC), electrolysis (SOEC) and oxygen transport membranes (OTM) are susceptible to electrochemical performance degradation due the presence of intrinsic extrinsic contaminants in air stream. Intrinsic airborne include a wide range gaseous compounds consisting cations Cr, Si, B, impurities SOx, NOx, VOC PM’s. During high temperature exposure, deposit react with cell components leading both ohmic...
Proton-conducting solid oxide electrolyzers (H-SOEs) provide promising opportunity to produce pure and dry hydrogen in steam electrolysis at relatively low operating temperatures (550-700˚C) utilizing electricity heat generated from renewable energy sources. Compared traditional high temperature (750-1000˚C) oxygen-conducting (O-SOEs), lower of H-SOE offers ease thermal management, active stack BOP materials cost reduction chromium evaporation metallic components. Like O-SOEs, preserving the...
Literature within the past two decades has highlighted ongoing issue of dual atmosphere corrosion in solid oxide fuel cell (SOFC) systems. This phenomenon occurs as a result simultaneous exposure ferritic stainless steel interconnects to anodic gas on one side and cathodic air stream opposing side. In this, air-exposed metal interconnect undergoes fast, anomalous loss form iron overgrowth with whisker platelet-type morphology. Studies have indicated that is favored at lower temperatures...
Steam electrolyzers, utilizing molten hydroxide electrolyte, offer potential for improvement in electrochemical efficiency, cost reduction, use of conventional materials construction and process scale up large hydrogen production. Stainless steels, used the fabrication cell components (current collector, gas separator, wet seals, manifolds) experience accelerated corrosion presence electrolyte both oxidizing (anodic) reducing (cathodic) atmospheres. In this study, behavior AISI 310 316 has...