A5045347340- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- Supercapacitor Materials and Fabrication
- Electrodeposition and Electroless Coatings
- Corrosion Behavior and Inhibition
- Advanced Battery Materials and Technologies
- Fuel Cells and Related Materials
- Conducting polymers and applications
- Advanced Nanomaterials in Catalysis
- Advancements in Battery Materials
- ZnO doping and properties
- Metal and Thin Film Mechanics
ZincNyx Energy Solutions (Canada)
2022-2024
Solutions Inc. (Japan)
2024
University of Alberta
2019-2021
Alberta Hospital Edmonton
2020
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...
Dimple grinding is one of the steps used in a common method preparing samples for transmission electron microscopy (TEM); TEM sample preparation process also involves ion beam sputtering after dimpling stage. During dimpling, spherical depression machined into sample, leaving thicker rim to support and facilitate handling. In this paper, an alternative application dimple developed; combined with optical utilized quantify internal porosity present within coatings. This technique essentially...
Abstract (Co,Fe) 3 O 4 nanoparticles are decorated onto N‐doped carbon nanotubes at room temperature through a simple mixing process and simultaneously deposited within porous gas diffusion layer (GDL) by an impregnation technique. The identified as the spinel phase transmission electron microscopy (TEM) X‐ray photoelectron spectroscopy (XPS) analysis. composite GDL is used air electrode for Zn‐air batteries shows excellent performance bifunctional catalyst with initial discharge charge...
Abstract Mn 3 O 4 ‐decorated N‐CNTs are synthesized and impregnated into porous carbon paper (gas diffusion layer or GDL) to form a composite catalyst‐GDL material in simple novel one‐pot process. The electrode features high active surface area, improved discharge performance, reduced vulnerability flooding when compared with other preparation techniques for similar catalysts. Electrochemical battery testing show catalytic activity maximum potential superior CNT supported catalysts,...
Various transition metal-based bimetallic and trimetallic oxides on N-CNTs were successfully synthesized in a one-pot process. Porous gas diffusion layers (GDLs) simultaneously impregnated with the catalysts during synthesis, resulting an efficient scalable preparation technique for nano-composite air electrodes. NiMnOx/N-CNT, NiFeOx/N-CNT, (Co,Fe)3O4/N-CNT highest performing based battery rate test results. Therefore, Ni-Co-Fe, Ni-Mn-Fe, Mn-Co-Fe systems investigated as combined oxide/N-CNT...
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 Zn−Co oxide (ZnCoO x ), Zn−Mn (ZnMnO Zn−Mn−Co (ZMCO), and Zn−Co−Fe (ZCFO) nanoparticles were successfully synthesized on nitrogen‐doped carbon nanotubes in a one‐pot process. Porous paper was simultaneously impregnated with the catalysts during synthesis used as air electrodes for Zn‐air batteries. ZnMnO /N‐CNT had best ORR performance half‐cell LSV experiments more positive onset potential than that of Pt−Ru/C (−0.067 V −0.078 vs Hg/HgO, respectively). ZCFO/N‐CNT activity towards...
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...
<title>Abstract</title> Ni-P has been widely used as a protective coating for many substrates. The corrosion resistance of in neutral solutions such NaCl, or acidic electrolytes HCl and H<sub>2</sub>SO<sub>4</sub>, extensively studied. However, the behavior coatings caustic media, KOH, received much less attention. Typically, is studied through use electrochemical methods with rates determined from currents potentials measured Tafel curves. In this work, coatings, P concentrations varying 2...
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 .
A zinc-air flow battery system pumps "fuel” (a zinc particle/KOH slurry) from a fuel tank to cell stack, where the particles are combined with oxygen air form zincate ions and produce electricity. The zincate-rich electrolyte is then returned tank. During charging cycle, passed regenerator, electricity (from renewable sources such as solar or wind) utilized convert particles. regenerated pumped back into for discharge process. Nickel considered use anode during regeneration it has been shown...