Browsing NTNU Open by Author "Vullum, Fride"
Now showing items 1-14 of 14
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Alloys as Anode Materials in Magnesium Ion Batteries
Syvertsen, Alf Petter (Master thesis, 2012)This thesis is a feasibility study of the possible application of magnesium alloys forfuture magnesium-ion batteries. It investigates dierent alloys and characterizesthem with respect to internal resistance, overpotentials ... -
Analysis of an Intermediate Band Solar Cell System: Based on Systems Engineering Principles
Thorstensen, Anne Elisabeth (Master thesis, 2013)The intermediate band solar cell (IBSC) is a so-called third generation solar cell, based on a new type of semiconductor materials; the intermediate band (IB) materials. In IB materials there is an additional intermediate ... -
Carbon Nanocones as Electrode Material in Lithium Ion Batteries
Nagell, Marius Uv (Master thesis, 2011)A carbon powder containing carbon nanocones was used as an anode material in lithium ion batteries. The powder was also treated in different ways, chemically, with microwaves, and with heat. The carbon powder was tape ... -
Exploring lithium ion batteries for wind powered water injection
Nysteen, Lars-Henrik (Master thesis, 2016)In this work, lithium ion batteries consisting of carbon-coated silica (\ce{SiO2}) anodes and various commercial cathodes were prepared, tested, and analysed for use in a novel wind-powered water injection system, designed ... -
Exploring V2C MXene as a New Cathode Material for Rechargeable Magnesium Batteries
Fagerli, Frode Håskjold (Master thesis, 2018)Rechargeable magnesium batteries (RMBs) is a promising technology to compete with state-of-the art lithium-ion batteries, due to the possible improvements in safety, abundance of materials and energy density. However, one ... -
Hydrothermal synthesis of materials for intermediate band solar cells
Mikalsen, Ragni Fjellgaard (Master thesis, 2013)Solar energy is an abundant energy source that may provide an environmentallyfriendly alternative to fossil fuels. The utilization of the solar energy have so farbeen limited by various energy losses in the photovoltaic ... -
New Materials for Mg-ion batteries - Mn3O4 as cathode
Asheim, Karina (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 ... -
Optimizing carbon coating of silica from diatom frustules as a high performance, low cost and environmentally friendly anode material for lithium ion batteries
Berg, Sigrun Sofie (Master thesis, 2018)The goal of this work was to optimize the carbon coating of silica from diatom frustules as a high performance, low cost and environmentally friendly anode material for lithium ion batteries. This was done by investigating ... -
Oxidation driven decomposition of CeNbO4 in pure oxygen
Vullum, Fride; Grande, Tor (Journal article; Peer reviewed, 2008)CeNbO4 possess oxygen hyper-stoichiometry at ambient and moderate temperature. At elevated temperature CeNbO4+δ is thermally reduced to near stoichiometric CeNbO4 accompanied by a structural phase transition. Above the ... -
Oxygen stoichiometry and transport properties of cerium niobate
Vullum, Fride; Grande, Tor (Journal article; Peer reviewed, 2008)CeNbO4 + δ has been synthesized by both solid state and wet chemical routes and characterized with respect to electrical conductivity and oxygen stoichiometry between 900 °C and 1100 °C and pO2 from 1 bar to 0.002 bar. ... -
Solid solubility and phase transitions in the system LaNb1-xTaxO4
Vullum, Fride; Nitsche, Fabian; Selbach, Sverre Magnus; Grande, Tor (Journal article; Peer reviewed, 2008)The solid solubility between LaNbO4 and LaTaO4 was investigated by X-ray diffraction, and a two-phase region was observed in the composition region LaNb1−xTaxO4 where 0.4⩽x⩽0.8. Single-phase LaNb1−xTaxO4 (0⩽x⩽0.4) with the ... -
Structural and electrochemical characterization of graphite materials for Li ion batteries
Tran, Phung Hieu Dinh (Master thesis, 2012)The purpose of this study is to find a correlation between the crystallite sizes in thebasal plane direction of graphite materials, used in carbon anodes in Lithium-ionbatteries. Carbon anodes are the most common type of ... -
Thermal characterisation of anode materials for Li-ion batteries
Gullbrekken, Øystein (Master thesis, 2012)Coin cells with lithium and graphite electrodes were assembled using different combinations of graphite material and electrolyte. Specifically, three commercially available graphite materials and five electrolyte compositions ... -
Wet Chemical Synthesis of Materials for Intermediate Band Solar Cells
Sortland, Øyvind Sunde (Master thesis, 2011)The economical feasibility of commercial, single-junction solar cells is limited by high costs and limited efficiencies. New solar cell concepts and materials are sought to decrease the production costs and increase the ...