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Natural Gas Anodes for Aluminium Electrolysis in Molten Fluorides
(Journal article; Peer reviewed, 2016)Industrial primary production of aluminium has been developed and improved over more than 100 years. The molten salt electrolysis process is still suffering from low energy efficiency and considerable emissions of greenhouse ... -
Natural Gas Anodes of Porous Graphite for Aluminium Electrolysis
(Doctoral theses at NTNU;2017:266, Doctoral thesis, 2017)Aluminium is the second metal produced in the world in terms of quantity. It is produced in a multistage process. First, aluminium ore is converted to pure aluminium oxide. The second stage is an electrolysis process. In ... -
A natural vector/matrix notation applied in an efficient and robust return-mapping algorithm for advanced yield functions
(Peer reviewed; Journal article, 2021)A fast and robust stress-integration algorithm is the key to full exploitation of advanced anisotropic yield functions in computational mechanics. Poor global convergence of a direct application of the Newton-Raphson scheme ... -
New Insights into Computational Fluid Dynamic Modeling of the Resistivity and Overpotential in Reverse Electrodialysis
(Journal article; Peer reviewed, 2018)The resulting electrical potential of a reverse electrodialysis is reduced both due to ohmic and non-ohmic resistances. The non-ohmic resistance is mainly controlled by concentration polarization which is a considerable ... -
New insights into orthophosphoric acid assisted rapid aqueous processing of NMC622 cathodes
(Peer reviewed; Journal article, 2023)The use of orthophosphoric acid to stabilize aqueous processing of high nickel NMC622 electrodes was assessed under rapid processing conditions, in which the active material powder was in suspension for less than 1 hour. ... -
New Insights into Silicon Purification by AlloyingLeaching Refining: A Comparative Study of MgSi, CaSi, and CaMgSi Systems
(Peer reviewed; Journal article, 2020)In the present work, a comparative study of the silicon alloying–leaching purification process was carried out on the recently developed Mg–Si system, the Ca–Si system, and the novel ternary Ca–Mg–Si system. Insights were ... -
New low temperature aluminium production process
(Master thesis, 2019)Aluminiumsproduksjon i dag er både dyrt og tidkrevende, med flere høyenergikrevende steg på veien. Bauxitt må først graves ut, for så å bli raffinert til Al2O3. For å redusere Al2O3 til ren aluminium kreves temperaturer ... -
New Materials for Mg-ion batteries - Mn3O4 as cathode
(Master thesis, 2016)Due to drawbacks with the lithium ion battery technology, magnesium ion batteries are being researched as an alternative replacement system. An optimal combination of component materials has however not been discovered ... -
New Methods to Determine PAH Emission Dynamics During Electrode Mass Processing
(Peer reviewed; Journal article, 2023)New measurement techniques aiming to achieve a better understanding of the PAH emissions dynamics during production of electrode paste briquettes were tested. Traditional sampling method requires several hours of sampling ... -
Ni-Co and Ni-Fe Catalysts for The Oxygen Evolution Reaction in Alkaline Water Electrolysis
(Master thesis, 2022)Nickel-based catalysts were chosen for alkaline electrolysis of water due to their higher corrosion resistance and activity in alkaline environments. Alkaline membrane water electrolysis tries to combine the low cost of ... -
Ni/NiO nanosheets for alkaline hydrogen evolution reaction: In situ electrochemical-Raman study
(Journal article; Peer reviewed, 2020)Nickel/Nickel oxide (Ni/NiO) nanosheets heterostructure is a cheap and active catalyst for hydrogen evolution reaction (HER) in alkaline electrolytes. However, the reason for this activity is still under debate. Herein ... -
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 ...