Browsing Institutt for materialteknologi by Title
Now showing items 1561-1580 of 2509
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Nickel based-catalysts for anion exchange membrane water electrolysis: Electrochemical measurements, Raman spectroscopy, and electrolyzer performance
(Doctoral theses at NTNU;2020:269, Doctoral thesis, 2020)Hydrogen is an energy carrier, feedstock, industrial process gas, and alternative transportation fuel. Low-temperature water electrolysis, the splitting of water into its constituent gases hydrogen and oxygen by the means ... -
NiCu mixed metal oxide catalyst for alkaline hydrogen evolution in anion exchange membrane water electrolysis
(Peer reviewed; Journal article, 2021)We report on the optimization of nickel-copper catalysts for superior performance as a cathode catalyst in anion exchange membrane (AEM) water electrolysis. The bifunctional system of NiCu mixed metal oxide (MMO) nanosheets ... -
NiFeB anode catalyst for anion exchange membrane water electrolysis
(Peer reviewed; Journal article, 2022)In this work, the Ni2Fe1B oxygen evolution reaction (OER) catalyst was scaled up to 5 g per batch and tested as an anode electrode in anion exchange membrane electrolysis. The Ni2Fe1B membrane electrode assemblies (MEAs) ... -
Non-steady 3D dendrite tip growth under diffusive and weakly convective conditions.
(Journal article; Peer reviewed, 2019)Three dimensional α-Al dendrite tip growth under varying solute gradients in an Al-Cu-Si alloy melt has been studied using real time synchrotron X-ray imaging and mathematical modelling. X-radiographic image sequences with ... -
Non-transferred arc hydrogen plasma torch simulations in OpenFOAM
(Master thesis, 2022)Dette prosjektet utførte en litteratur studie og numeriske simuleringsforsøk på termisk hydrogen plasma. Hovedmålet var å modellere hydrogen plasma i en ikke-overført lysbue plasma fakkel. Hovedmotivasjonen bak er å gå fra ... -
Nonlinear mechanical behaviour of Ba0.5Sr0.5Co0.8Fe0.2O3 − δ and in situ stress dependent synchrotron X-ray diffraction study
(Journal article; Peer reviewed, 2017)Perovskite type Ba0.5Sr0.5Co0.8Fe0.2O3 − δ ceramics display nonlinear stress-strain behaviour upon uniaxial compression at room temperature. Step functional loading experiments show that the nonlinear strain response of ... -
A novel approach for the evaluation of ice release performance of coatings using static friction measurements
(Peer reviewed; Journal article, 2020)Atmospheric icing on structures and equipment represents a challenge for operation and safety. Passive ice removal by ice-phobic coatings has received much attention over the last decades. The current state-of-the-art ... -
Novel carbon coating on aluminum current collectors for lithium-ion batteries
(Peer reviewed; Journal article, 2022)In this work a significant improvement of the performance of LiFePO4 (LFP) composite cathodes, in particular at high rates (up to 12C), is demonstrated by the use of carbon-coated aluminum current collectors. The coating ... -
Novel coatings for graphite materials in PV silicon applications: A study of the surface wettability and interface interactions
(Peer reviewed; Journal article, 2021)Coatings are one of the promising techniques that can be applied to modify the surface properties and tailor the surface interactions with the surrounding. The development of conformable coatings for graphite materials can ... -
Novel Coatings with low adhesion to ice
(Doctoral theses at NTNU;2022:70, Doctoral thesis, 2022)Atmospheric icing can be a nuisance during the winter season in the Northern hemisphere, both in everyday life and for critical infrastructure. The strong adhesive forces between ice and organic coatings typically employed ... -
Novel combinatory method for surface and crystallinity analysis of crystalline materials
(Journal article; Peer reviewed, 2023) -
Novel process of coating Al on graphene involving organic aluminum accompanying microstructure evolution
(Journal article; Peer reviewed, 2018)A novel chemical reduction of organic aluminum for coating Al on the graphene surface is proposed. During the process, Al powder reacted with the (C2H5)2Br solution to produce (C2H5)3Al solution, followed by gradual ... -
Novel synthesis method of BaTiO3-nanoparticles - Synthesis of BaTiO3-nanoparticles by spray-pyrolysis of TiO2-nanoparticles dispersed in Ba(NO3)2-solution
(Master thesis, 2016)Ferroelectric materials are widely used in different technological applications. Lead zirconate titanate (PZT) materials are currently the most used, due to their excellent piezoelectric properties and relatively high ... -
Novel technique to study the wet chemical etching response of multi-crystalline silicon wafers
(Peer reviewed; Journal article, 2022)This study is based on the application of a combinatory method for surface and crystallinity analysis of crystalline materials. The obtained results illustrated the effects of different additives (isopropyl alcohol (IPA) ... -
Novel Topological Spin Solitons for Spintronics Applications
(Doctoral theses at NTNU;2021:227, Doctoral thesis, 2021)Topologically non-trivial spin solitons, such as skyrmions and magnetic edge dislocations, are particle-like nanoscale configurations in the magnetization field. In solid state systems, they can be written, moved, and ... -
Novel Zr- based AB2 Laves type Alloys as Advanced Anodes for High Energy - High Power Metal Hydride Batteries
(Doctoral theses at NTNU;2020:129, Doctoral thesis, 2020)Metal hydrides have been studied during the last five decades as efficient materials for various energy storage and conversion systems. Among applications, the use of metal hydrides as electrode materials is the most ... -
NTNU-SINTEF SolarNet: A solar irradiation monitoring network at high latitudes
(Peer reviewed; Journal article, 2023)This study presents a monitoring network for solar irradiation at high latitudes, called NTNU-SINTEF SolarNet. The network collects, with a time resolution ranging from seconds to hours, solar irradiance data, e.g. global ... -
Nucleation and Early Growth of Multicrystalline Solar Cell Silicon
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:355, Doctoral thesis, 2012)As the production of solar cell silicon evolves and new concepts are introduced, the need for a more complete understanding of the basic principles of silicon solidification is also increasing. Nucleation has previously ... -
Nucleation and Growth of High Performance Multicrystalline Silicon (HPMC-Si) in Si3N4 and SiC Coated Crucibles
(Master thesis, 2019)The silicon material for photovoltaic (PV) industry demands high quality. It is known that dislocation clusters are among the foremost limiting effects on the minority carrier lifetime, and thus the PV efficiency. The ... -
Nucleation and growth of multicrystalline silicon
(Doctoral theses at NTNU;2018:42, Doctoral thesis, 2018)This work has focused on the nucleation process of multicrystalline silicon (mc-Si) for photovoltaic (PV) applications during solidification in α-Si3N4 coated crucibles, the typical crucible coating used commercially. ...