Browsing NTNU Open by Author "Tolchard, Julian R"

Now showing items 1-14 of 14

    • Anelastic properties of La0.6Sr0.4Co1−yFeyO3-δ at high temperatures 

      Kimura, Y; Tolchard, Julian R; Einarsrud, Mari-Ann; Grande, Tor; Amezawa, K; Fukuhara, M; Hashimoto, Shin-ichi; Kawada, Tatsuya (Journal article; Peer reviewed, 2014)
      The dynamic amplitude dependence of the Young's modulus and the internal friction of La0.6Sr0.4Co0.2Fe0.8O3 −δ (LSCF6428) at high temperatures were evaluated by resonance measurements. At the temperatures from room temperature ...

    • Effects of sulphur on a Co/Mn-based catalyst for Fischer-Tropsch reactions 

      Enger, Bjørn Christian; Walmsley, John; Svenum, Ingeborg-Helene; Tolchard, Julian R; Yang, Jia; Myrstad, Rune; Gjervan, Torbjørn; Khan, Asad Ahmad; Mutairi-Al, Abdulkarim; Karim, Khalid (Journal article; Peer reviewed, 2018)
      The long term effect of up to 10 ppm H2S was studied for Fischer–Tropsch conversion of syngas by catalytic testing at 240 °C, 5 bar, H2/CO = 2.1 and GHSV = 2400 Nml/gcat h. Sulphur was dosed after ~ 300 or ~ 1000 h time ...

    • Gas Switching Reforming (GSR) for syngas production with integrated CO2 capture using iron-based oxygen carriers 

      Zaabout, Abdelghafour; Dahl, Paul Inge; Ugwu, Ambrose; Tolchard, Julian R; Cloete, Schalk Willem Petrus; Amini, Shahriar (Journal article; Peer reviewed, 2019)
      The process behavior of a Gas Switching Reforming (GSR) reactor was studied using three different iron-based oxygen carrier materials: Iron-oxide on Alumina, Iron-Nickel oxide on Alumina and Iron-Ceria on Alumina. It was ...

    • Gas Switching Reforming for syngas production with iron-based oxygen carrier-the performance under pressurized conditions 

      Ugwu, Ambrose; Zaabout, Abdelghafour; Tolchard, Julian R; Dahl, Paul Inge; Amini, Shahriar (Journal article; Peer reviewed, 2019)
      A four-stage Gas Switching Reforming for syngas production with integrated CO2 capture using an iron-based oxygen carrier was investigated in this study. The oxygen carrier was first reduced using dry methane, where high ...

    • High temperature X-ray diffraction and thermo-gravimetrical analysis of the cubic perovskite Ba0.5Sr0.5Co0.8Fe0.2O3-δ under different atmospheres 

      Sahini, Mtabazi Geofrey; Tolchard, Julian R; Wiik, Kjell; Grande, Tor (Journal article; Peer reviewed, 2015)
      Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCF) with the cubic perovskite structure is known to be metastable at low temperature under an oxidizing atmosphere. Here, the thermal and chemical expansion of BSCF were studied by in situ high ...

    • Improved cyclability of Nickel-rich layered oxides 

      Wagner, Nils Peter; Tolchard, Julian R; Tron, Artur; Pollen, Harald Norrud; Gaertner, Heiko; Vullum, Per Erik (Peer reviewed; Journal article, 2020)
      This study compares the physico- and electro- chemical properties of LiNi0.8Mn0.10Co0.1O2 (NMC811) and LiNi0.83Mn0.06Co0.09Al0.1O2 (NMCA) prepared by an oxalic acid co-precipitation. Deposition of a SiO2 surface coating ...

    • New insights into orthophosphoric acid assisted rapid aqueous processing of NMC622 cathodes 

      Tolchard, Julian R; Vullum, Per Erik; Arstad, Bjørnar; Wagner, Nils Peter (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. ...

    • Non-​Nucleophilic Electrolyte Based on Ionic Liquid and Magnesium Bis(diisopropyl)​amide for Rechargeable Magnesium-​Ion Batteries 

      Kallidanthiyil Chellappan, Lethesh; Kvello, Jannicke Hatlø; Tolchard, Julian R; Dahl, Paul Inge; Hanetho, Sidsel Meli; Berthelot, Romain; Fiksdahl, Anne; Jayasayee, Kaushik (Peer reviewed; Journal article, 2020)
      A non-nucleophilic electrolyte for rechargeable Mg-ion batteries is developed by the reaction of magnesium bis(diisopropyl)amide and 1-ethyl-3-methylimidazolium tetrachloroaluminate ionic liquid in tetrahydrofuran solvent. ...

    • Platinum and Platinum Group Metal-Free Catalysts for Anion Exchange Membrane Fuel Cells 

      Truong, Van Men; Tolchard, Julian R; Svendby, Jørgen; Manikandan, Maidhily; Miller, Hamish; Sunde, Svein; Hsiharng, Yang; Dekel, Dario; Barnett, Alejandro Oyarce (Journal article; Peer reviewed, 2020)
      The development of active hydrogen oxidation reaction (HOR) and oxygen reduction reaction (ORR) catalysts for use in anion exchange membrane fuel cells (AEMFCs), which are free from platinum group metals (PGMs), is expected ...

    • Rationalization of hydrothermal synthesis of NaNbO3 by rapid in situ time-resolved synchrotron X-ray diffraction 

      Skjærvø, Susanne Linn; Wells, Kristin Høydalsvik; Sommer, Sanna; Vu, Tuong-Dan; Tolchard, Julian R; van Beek, Wouter; Grande, Tor; Iversen, Bo B.; Einarsrud, Mari-Ann (Journal article; Peer reviewed, 2018)
      In situ monitoring of the formation of crystalline phases during conventional hydrothermal synthesis is experimentally challenging. Here, we report an in situ time-resolved synchrotron X-ray diffraction study during ...

    • Silicon anodes for lithium-ion batteries produced from recovered kerf powders 

      Wagner, Nils Peter; Tron, Artur; Tolchard, Julian R; Noja, Gianluigi; Bellmann, Martin Pawel (Journal article; Peer reviewed, 2019)
      Silicon kerf waste from a photovoltaic silicon production process is assessed as an anode material for application as a lithium ion battery anode. In contrast to previous studies, the Si-kerf is used as-produced, with no ...

    • A Single-Pot Co-Precipitation Synthesis Route for Ni-Rich Layered Oxide Materials with High Cycling Stability 

      Pollen, Harald Norrud; Tolchard, Julian R; Svensson, Ann Mari; Wagner, Nils Peter (Peer reviewed; Journal article, 2022)
      In this work we report variations of LiNi0.88Mn0.06Co0.06O2 synthesised through a single-pot oxalic acid co-precipitation route, in which all cation precursors were added in the same step. The effects of Al-doping, ...

    • Stabilizing the Cathode Interphase of LNMO using an Ionic-liquid based Electrolyte 

      Østli, Elise Ramleth; Mathew, Alma; Tolchard, Julian R; Brandell, Daniel; Svensson, Ann Mari; Selbach, Sverre Magnus; Wagner, Nils Peter (Peer reviewed; Journal article, 2023)
      The ionic liquid (IL)-based electrolyte comprising 1.2 M lithium bis(fluorosulfonyl)imide (LiFSI) in N-propyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide (PYR13FSI) (ILE) has been evaluated as a suitable system for the ...

    • The effect of ferroelasticity of La1-xSrxCo1-yFeyO3-d on the machanical stability of solid oxide fuel cells 

      Kimura, Yuta; Tolchard, Julian R; Einarsrud, Mari-Ann; Grande, Tor; Amezawa, Koji; Hashimoto, Shin-ichi; Kawada, Tatsuya (Journal article, 2013)
      The stress-strain relationships of La0.6Sr0.4CoO3-δ (LSC), La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF6428) and La0.6Sr0.4FeO3-δ (LSF) was evaluated by uniaxial compression tests in the temperature range between room temperature and ...