A5070475386- Advanced battery technologies research
- Electrocatalysts for Energy Conversion
- Supercapacitor Materials and Fabrication
- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Semiconductor materials and devices
- Electronic and Structural Properties of Oxides
- Conducting polymers and applications
- Catalytic Processes in Materials Science
- Polymer Science and Applications
- Magnetism in coordination complexes
- Advanced Scientific Research Methods
- Advanced Battery Technologies Research
- Oxidative Organic Chemistry Reactions
- Advanced Nanomaterials in Catalysis
- Porphyrin and Phthalocyanine Chemistry
- Fuel Cells and Related Materials
- Metal-Catalyzed Oxygenation Mechanisms
- Transition Metal Oxide Nanomaterials
- ZnO doping and properties
- Electrostatics and Colloid Interactions
- Lanthanide and Transition Metal Complexes
- Electron Spin Resonance Studies
University of Alberta
2018-2024
Alberta Hospital Edmonton
2020
KU Leuven
1998
Abstract Poly(acrylic acid) (PAA) is a promising polymer host to support alkaline electrolytes in Zn‐air batteries. Herein, precursors containing different concentrations of monomers, crosslinkers and additives such as zinc oxide solution are polymerized fabricate gel (GPEs) via one‐pot synthesis. The compositional effects the GPEs on battery performance evaluated more efficient cell design demonstrated. With vertical double air electrode configuration, ZABs using PAA‐based show...
Gel polymer electrolytes (GPEs) are emerging materials for Zn–air batteries (ZABs), since the GPE can act as a combined electrolyte and separator in battery.
Hybrids of hollow mesoporous carbon and Mn<sub>3</sub>O<sub>4</sub> nanoparticles exhibit excellent catalytic activity on oxygen reduction reaction (ORR) in Zn–air battery.
Abstract The air electrode of a Zn-air battery facilitates the O 2 reduction and evolution reactions during discharge charge, respectively. These are kinetically sluggish appropriate catalysts essential at to increase efficiency. Precious metals traditionally used, but increasingly attention has shifted towards non-precious metal decrease cost practicality batteries. However, loading catalyst onto is equally as important selection. Several methods can be used deposit catalysts, each with...
Abstract Zinc‐air batteries (ZABs) are one of many energy storage technologies that can help integrate renewable into the power grid. A key developmental goal for ZABs is replacing precious metal catalysts at air electrode with more abundant and inexpensive materials. In this work, a MnFe x O y bifunctional catalyst directly deposited on ZAB using atomic layer deposition (ALD). With ALD, composition coating be finely tuned based catalytic activity. Characterization through electron...
Atomic layer deposition (ALD) of FeOx thin films, prepared using the air stable and low cost precursor ethylferrocene, was characterized through electron microscopy spectroscopic ellipsometry (SE) techniques. To model growth behavior on carbon-based electrodes in metal–air batteries, carbon substrates were employed for microscopy. Electron imaging revealed an island morphology deposits, which eventually coalesced into a continuous film with pinholes. Further resulted another islands forming...
Evaluating the electrochemical performance of catalysts towards oxygen reduction and evolution reactions in zinc-air batteries is a routine process often conducted using two-electrode cell. At air electrode, current collector necessary if carbon paper-based gas diffusion layer (GDL) employed. The catalytic properties may interfere with studied catalyst on GDL flaws cell design allow electrolyte contact to be made collector. zinc highly alkaline electrolytes (e.g., KOH), high surface tension,...
Abstract Hybrids comprising hollow mesoporous nitrogen‐doped carbon (HMC) nanospheres and metal‐oxide nanoparticles were prepared through a hydrothermal synthesis. These materials exhibit excellent bifunctional catalytic activity in the oxygen reduction evolution reactions (ORR OER, respectively) that are core to efficient operation of Zn‐air batteries. When incorporated into prototype devices, Co 3 O 4 MnCo 2 nanoparticle‐decorated HMC exhibited discharge potentials 1.26 1.28 V at 10 mA cm...
Abstract Invited for this month's cover picture are the research teams of Jonathan G. C. Veinot and Douglas Ivey at University Alberta (Canada). The provides an artistic representation a new class bifunctional Zn‐air battery catalysts consisting hollow mesoporous carbon nanospheres decorated with various precious‐metal‐free transition‐metal oxide nanoparticles. Read full text Article 10.1002/celc.202001526 .
The rapid growth of renewable energy production requires an economical and efficient way to store deliver the electricity. Electrically rechargeable Zinc-air batteries have gained revived interest among various technologies available with their high theoretical density low cost 1 . However, large-scale industrial deployment zinc-air has been hampered by several problems, i.e., round-trip efficiency reduced cycling stability, both which can be primarily attributed degradation air electrodes....
Implementation of renewable energy into the power grid is a necessary step for more sustainable future. However, this process strongly dependent on capacity practical storage technologies available. Zinc-air batteries show great promise storage, boasting high theoretical density, inexpensive electrode materials, and excellent safety. Current development zinc-air is, however, stifled by sluggish oxygen kinetics occurring both during discharge charge. While precious metals such as platinum...
Carbon-free energy sources will become a necessary step in order to mitigate the effects of climate change. In integrate these renewable sources, which are usually intermittent and not on-demand, into power grid, significant amount storage be required. The popularity lithium-ion batteries as an option has exploded recent years; however, safer less expensive alternative may zinc-air batteries. Zinc-air combine zinc, abundant safe metal, with oxygen from air. Using battery component, presents...
Incorporating intermittent renewable energy sources into the power grid will require large amounts of grid-scale storage. Electrochemical batteries are a versatile and scalable storage option and, hence, Li-ion have been widely adopted to store excess wind solar [1]. batteries, however, relatively low density serious safety concerns. An alternative electrochemical battery lies with zinc-air batteries. This technology uses lower cost materials is overall much safer. Furthermore, larger...