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Blar i NTNU Open på forfatter "Mæhlen, Jan Petter"

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    • A Method for Controlled Oxide and Carbon Coating of Silicon Nanoparticles as Anode in Lithium-Ion Batteries 

      Orderud Skare, Marte (Master thesis, 2017)
      Silicon has emerged as a promising alternative to graphite in lithium-ion batteries. Silicon can, theoretically, provide up to ten times higher capacity due to its high alloying capabilities with lithium. This improvement ...
    • A Stability Study of Substoichiometric Silicon Nitride Nanoparticles as Active Anode Material for Li-ion Batteries 

      Krogsæter, Henrik (Master thesis, 2019)
      De fremragende elektrokjemiske egenskapene til understøkiometrisk silisium nitrid (SiNx) har gjort dette material til en potensiell kandidat for neste generasjons Li-ion batteri aktive anode materiale. Den først litsieringen ...
    • Anodes for Li‑ion batteries prepared from microcrystalline silicon and enabled by binder’s chemistry and pseudo‑self‑healing 

      Foss, Carl Erik Lie; Stephan, Müssig; Svensson, Ann Mari; Vie, Preben Joakim Svela; Ulvestad, Asbjørn; Mæhlen, Jan Petter; Koposov, Alexey (Peer reviewed; Journal article, 2020)
      Silicon, while suffering from major degradation issues, has been recognized as a next promising material to replace currently used graphite in the anodes of Li-ion batteries. Several pathways to mitigate the capacity fading ...
    • Carbon-Coated Industrial-Grade Silicon as Potential Anode Material in Lithium-Ion Batteries 

      Backer, Lasse August Dørum (Master thesis, 2021)
      Silisium (Si) er et lovende anodemateriale for neste generasjons litium-ione-batterier (LIB) grunnet dens evne til å reversibelt danne legeringer med høy litiumkonsentrasjon. Dette gir en ekstremt høy gravimetrisk kapasitet ...
    • Morphology effects in MgH2 anode for lithium ion batteries 

      El-Kharbachi, Abdelouahab; Andersen, Hanne Flåten; Sørby, Magnus Helgerud; Vullum, Per Erik; Mæhlen, Jan Petter; Hauback, Bjørn (Journal article, 2017)
      In order to acquire reproducible electrodes relevant for Li ion batteries new MgH2 electrodes are successfully obtained from homogenous slurries in N-Methyl-2-Pyrrolidone “NMP” solvent. The electrodes are aimed to elucidate ...
    • On the Cycling Performance and Stability of Silicon-Based Anodes in Lithium-Ion Batteries - Revealing Challenges and Failure Mechanisms Using Post Mortem Analyses 

      Kaland, Henning (Master thesis, 2017)
      Li-ion batteries with improved energy density can be obtained by increasing the Si content in the graphite electrode, or replace it entirely with a Si based electrode. This may have the additional benefit of improving ...
    • Silicon Nanoparticle Ensembles for Lithium-Ion Batteries Elucidated by Small-Angle Neutron Scattering 

      Lai, Samson Yuxiu; Knudsen, Kenneth Dahl; Sejersted, Benjamin Tjeltveit; Ulvestad, Asbjørn; Mæhlen, Jan Petter; Koposov, Alexey (Journal article; Peer reviewed, 2019)
      Silicon in the form of nanoparticles has attracted significant interest in the field of lithium-ion batteries due to the enormous capability of lithium intake. In the present work we demonstrate the characterization of ...
    • Silicon-carbon composite anodes from industrial battery grade silicon 

      Foss, Carl Erik Lie; Andersen, Hanne Flåten; Ulvestad, Asbjørn; Kirkengen, Martin; Vullum, Per Erik; Voje, Jorunn; Tronstad, Ragnar; Mokkelbost, Tommy; Mæhlen, Jan Petter (Journal article; Peer reviewed, 2019)
      In this work, silicon/carbon composites for anode electrodes of Li-ion batteries are prepared from Elkem’s Silgrain® line. Gentle ball milling is used to reduce particle size of Silgrain, and the resulting Si powder consists ...
    • Stoichiometry-Controlled Reversible Lithiation Capacity in Nanostructured Silicon Nitrides Enabled by in Situ Conversion Reaction 

      Ulvestad, Asbjørn; Skare, Marte Orderud; Foss, Carl Erik Lie; Krogsæter, Henrik; Reichstein, Jakob; Preston, Thomas J.; Mæhlen, Jan Petter; Andersen, Hanne Flåten; Koposov, Alexey (Peer reviewed; Journal article, 2021)
      In modern Li-based batteries, alloying anode materials have the potential to drastically improve the volumetric and specific energy storage capacity. For the past decade silicon has been viewed as a “Holy Grail” among these ...
    • Understanding Capacity Fading of MgH2 Conversion-Type Anodes via Structural Morphology Changes and Electrochemical Impedance 

      El-Kharbachi, Abdelouahab; Hu, Yang; Sørby, Magnus Helgerud; Vullum, Per Erik; Mæhlen, Jan Petter; Fjellvåg, Helmer; Hauback, Bjørn (Journal article; Peer reviewed, 2018)
      Previous studies have demonstrated that MgH2 is a promising conversion-type anode toward Li with high capacity (2037 mAh/g) and low discharge/charge overpotential hysteresis. A major challenge is the capacity loss after a ...

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