Now showing items 21-31 of 31

    • On Vanadium Substitution in Li2MnSiO4/C as Positive Electrode for Li-ion Batteries 

      Wagner, Nils Peter; Vullum, Per Erik; Nord, Magnus Kristofer; Svensson, Ann Mari; Vullum-Bruer, Fride (Journal article; Peer reviewed, 2016)
      Vanadium substitution is an interesting approach to manipulate the properties of the poor electronic and ionic conducting lithium transition metal orthosilicates. Especially, if incorporated on the Si site, it could alter ...
    • Optimizing carbon coating parameters for obtaining SiO2/C anodes with improved electrochemical performance 

      Blanco, Maria Valeria; Renman, Viktor; Zhu, Jiefang; Vullum-Bruer, Fride; Svensson, Ann Mari (Peer reviewed; Journal article, 2021)
      In this work, we present a comprehensive and systematic study on the use of low-cost and highly abundant carbon precursors to obtain SiO2/C anodes with superior electrochemical performance towards Li-ions. Different SiO2/C ...
    • Performance and failure analysis of full cell lithium ion battery with LiNi0.8Co0.15Al0.05O2 and silicon electrodes 

      Wagner, Nils Peter; Asheim, Karina; Vullum-Bruer, Fride; Svensson, Ann Mari (Journal article; Peer reviewed, 2019)
      The influence of the lithium inventory on the performance and degradation mechanism of NCA||Si cells operating at a third of the theoretical silicon capacity is analysed. The lithium inventory was increased by electrochemical ...
    • Progression of reduction of MoO3 observed in powders and solution-processed films 

      Inzani, Katherine; Nematollahi, Mohammadreza; Selbach, Sverre Magnus; Grande, Tor; Vullum-Bruer, Fride (Journal article; Peer reviewed, 2017)
      Understanding the reduction of MoO3 is important for the utilization of this material in optoelectronic applications. Here, we examine the changes that take place during reduction of a solution-processed thin film of MoO3. ...
    • PVA-assisted combustion synthesis and characterization of porous nanocomposite Li2FeSiO4/C 

      Zhou, Haitao; Einarsrud, Mari-Ann; Vullum-Bruer, Fride (Journal article; Peer reviewed, 2012)
      Porous Li2FeSiO4/C nanocomposites were synthesized by a PVA-assisted combustion method, and phase pure Li2FeSiO4 was produced for samples prepared with 20 and 30 wt.% starch. The electrochemical properties of the Li2FeSiO4/C ...
    • Silica from diatom frustules as anode material for Li-ion batteries 

      Norberg, Andreas Nicolai; Wagner, Nils Peter; Kaland, Henning; Vullum-Bruer, Fride; Svensson, Ann Mari (Journal article; Peer reviewed, 2019)
      In spite of its insulating nature, SiO2 may be utilized as active anode material for Li-ion batteries. Synthetic SiO2 will typically require sophisticated synthesis and/or activation procedures in order to obtain a ...
    • Solvent-Controlled Charge Storage Mechanisms of Spinel Oxide Electrodes in Mg Organohaloaluminate Electrolytes 

      Wang, Lu; Wang, Zhaohui; Vullum, Per Erik; Selbach, Sverre Magnus; Svensson, Ann Mari; Vullum-Bruer, Fride (Journal article; Peer reviewed, 2017)
      Considering the improved safety, reduced cost, and high volumetric energy density associated with Mg batteries, this technology has distinct advantages for large-scale energy storage compared to other existing battery ...
    • Sponge-like porous manganese(II,III) oxide as a highly efficient cathode material for rechargeable magnesium ion batteries 

      Wang, Lu; Asheim, Karina; Vullum, Per Erik; Svensson, Ann Mari; Vullum-Bruer, Fride (Journal article; Peer reviewed, 2016)
      Here, we are the first to report a spinel type Mn3O4 as cathode material for Mg-ion battery (MIB) with graphite foil (Gif) as current collector. High Coulombic efficiency and good cyclic stability of Mn3O4 are demonstrated, ...
    • Structure-Property Relations of Reduced MoO3 

      Inzani, Katherine (Doctoral thesis at NTNU;2016:190, Doctoral thesis, 2016)
      Molybdenum oxide is an important component in many technological applications. Its unusually high work function coupled with its transparency make it valuable in optoelectronic devices such as photovoltaic cells and light ...
    • Tailoring properties of nanostructured MoO3−x thin films by aqueous solution deposition 

      Inzani, Katherine; Nematollahi, Mohammadreza; Selbach, Sverre Magnus; Grande, Tor; Waalekalv, Magnus Langøien; Brakstad, Thomas; Reenaas, Turid Dory; Kildemo, Morten; Vullum-Bruer, Fride (Journal article, 2018)
      Molybdenum oxide films are required for a large range of optical, electronic and catalytic applications, and optimal film characteristics are similarly broad. Furthermore, the layered crystal structure of MoO3 is suited ...
    • Thermal Conductivity, Heat Sources and Temperature Profiles of Li-ion Batteries 

      Burheim, Odne Stokke; Onsrud, Morten Andreas; Pharoah, John George; Vullum-Bruer, Fride; Vie, Preben Joakim Svela (Journal article; Peer reviewed, 2014)
      In this paper we report the thermal conductivity of several commercial and non-commercial Li-ion secondary battery electrode materials with and without electrolytesolvents. We also measure the Tafel potential, the ohmic ...