Martin Kirkengen

• Ulvestad, Asbjørn; Reksten, Anita; Andersen, Hanne Flåten; Almeida Carvalho, Patricia; Jensen, Ingvild Julie Thue & Nagell, Marius Uv [Show all 9 contributors for this article] (2020). Crystallinity of silicon nanoparticles: Direct influence on the electrochemical performance of lithium ion battery anodes. ChemElectroChem. ISSN 2196-0216. 7(21), p. 4349–4253. doi: 10.1002/celc.202001108. Full text in Research Archive Show summary

  The use of silicon (Si) in the form of nanoparticles is one of the most promising routes for boosting the capacity of modern Li‐ion batteries. Many parameters influence the performance of Si making the comparison of materials complicated. The present work demonstrates a direct comparison of Si nanoparticles with amorphous and crystalline structures prepared through the same chemistry with the same particle size and morphology. The amorphous Si nanoparticles with an average diameter of 100 nm were synthesized through silane pyrolysis, and their crystalline analogues were obtained through subsequent annealing not altering size or morphology of the nanoparticles. Such direct comparison allows evaluation of the specific impact of crystallinity on the material's performance. From electrochemical analysis of these materials, the electrodes prepared from amorphous nanoparticles were found to exhibit improved cycle life compared to electrodes prepared from crystalline nanoparticles when the delithiation capacity of the anode was limited to 1000 mAh/gSi.

• Andersen, Hanne Flåten; Foss, Carl Erik Lie; Voje, Jorunn; Tronstad, Ragnar; Mokkelbost, Tommy & Vullum, Per Erik [Show all 9 contributors for this article] (2019). Silicon-carbon composite anodes from industrial battery grade silicon. Scientific Reports. ISSN 2045-2322. 9. doi: 10.1038/s41598-019-51324-4. Full text in Research Archive
• Ulvestad, Asbjørn; Mæhlen, Jan Petter & Kirkengen, Martin (2018). Silicon nitride as anode material for Li-ion batteries: Understanding the SiNx conversion reaction. Journal of Power Sources. ISSN 0378-7753. 399, p. 414–421. doi: 10.1016/j.jpowsour.2018.07.109. Full text in Research Archive
• Ulvestad, Asbjørn; Andersen, Hanne Flåten; Jensen, Ingvild Julie Thue; Mongstad, Trygve; Mæhlen, Jan Petter & Prytz, Øystein [Show all 7 contributors for this article] (2018). Substoichiometric Silicon Nitride – An Anode Material for Li-ion Batteries Promising High Stability and High Capacity. Scientific Reports. ISSN 2045-2322. 8. doi: 10.1038/s41598-018-26769-8. Full text in Research Archive
• Ulvestad, Asbjørn; Andersen, Hanne Flåten; Mæhlen, Jan Petter; Prytz, Øystein & Kirkengen, Martin (2017). Long-term cyclability of substoichiometric silicon nitride thin film anodes for Li-ion batteries. Scientific Reports. ISSN 2045-2322. 7(1). doi: 10.1038/s41598-017-13699-0. Full text in Research Archive
• Mongstad, Trygve; Andersen, Hanne Flåten; Mæhlen, Jan Petter; Filtvedt, Werner Olav; Klette, Hallgeir & Nordseth, Ørnulf [Show all 7 contributors for this article] (2016). No Significant Effect of Phosphorous Doping on the Electrochemical Performance of Silicon-Carbon Composite Anodes for Li-ion Batteries. ECS Transactions. ISSN 1938-5862. 73(1), p. 275–280. doi: 10.1149/07301.0275ecst.
• Garcia-Gusano, Diego; Espegren, Kari Aamodt; Lind, Arne & Kirkengen, Martin (2016). The role of the discount rates in energy systems optimisation models. Renewable and Sustainable Energy Reviews. ISSN 1364-0321. 59, p. 56–72. doi: 10.1016/j.rser.2015.12.359. Full text in Research Archive
• Ulvestad, Asbjørn; Mæhlen, Jan Petter & Kirkengen, Martin (2015). Silicon nitride coated silicon thin films as anodes for Li-ion batteries. ECS Transactions. ISSN 1938-5862. 64(22), p. 107–111. doi: 10.1149/06422.0107ecst. Full text in Research Archive
• Andersen, Hanne Flåten; Filtvedt, Werner Olav; Mæhlen, Jan Petter; Mongstad, Trygve; Kirkengen, Martin & Holt, Arve (2014). Production of Silicon Particles for High-Capacity Anode Material Yielding Outstanding Production Capacity. ECS Transactions. ISSN 1938-5862. 62(1), p. 97–105. doi: 10.1149/06201.0097ecst.
• Nærland, Tine Uberg; Angelskår, Hallvard; Kirkengen, Martin; Søndenå, Rune & Marstein, Erik Stensrud (2012). The role of excess minority carriers in light induced degradation examined by photoluminescence imaging. Journal of Applied Physics. ISSN 0021-8979. 112(3). doi: 10.1063/1.4735992.
• Kirkengen, Martin & Bergli, Joakim (2009). Slow relaxation and equilibrium dynamics in a two-dimensional Coulomb glass: Demonstration of stretched exponential energy correlations. Physical Review B. Condensed Matter and Materials Physics. ISSN 1098-0121. 79(7). doi: 10.1103/PhysRevB.79.075205.
• Glatz, A.; Vinokur, VM; Bergli, Joakim; Kirkengen, Martin & Galperin, Yuri (2008). The Coulomb gap and low energy statistics for Coulomb glasses. Journal of Statistical Mechanics: Theory and Experiment. ISSN 1742-5468. doi: 10.1088/1742-5468/2008/06/P06006.
• Kirkengen, Martin; Bergli, Joakim & Galperin, Yuri (2007). Direct generation of charge carriers in c-Si solar cells due to embedded nanoparticles. Journal of Applied Physics. ISSN 0021-8979. 102. doi: 10.1063/1.2809368.
• Kirkengen, Martin; Bergli, Joakim & Galperin, Yuri (2006). Coherent charge transport through an interface between a superconductor and hopping insulator: Role of barrier properties. Physical Review B. Condensed Matter and Materials Physics. ISSN 1098-0121. 74.
• Aarhus, Lars Thore; Holmqvist, Knut; Kirkengen, Martin & Kristoffersen, Thor (2002). Generalized Two-Tier relevance filtering of compute game update events. In Wolf, Lars (Eds.), Proceedings of the 1st Workshop on Network and System Support for Games, NETGAMES 2002. Association for Computing Machinery (ACM). ISSN 1-58113-493-2. p. 10–13.
• Kirkengen, Martin & Galperin, Yuri (2000). Nonlinear Acoustic and Microwave absorption in disordered semiconductors. Physics Review. 62(24).

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• Svensson, Ann Mari; Mæhlen, Jan Petter; Kirkengen, Martin; Torgeir, Welo, NTNU & Bjørkeng, Per Kristian (2020). Snart kan batteriet vare lenger enn el-bilen. [Newspaper]. Aftenposten.
• Ulvestad, Asbjørn; Koposov, Alexey; Skare, Marte Orderud; Mæhlen, Jan Petter; Andersen, Hanne Flåten & Prytz, Øystein [Show all 7 contributors for this article] (2018). Amorphous Silicon Nitride - A Novel Anode Material for Li-ion Batteries.
• Kirkengen, Martin (2017). Reint samvit med elbil? [Radio]. Ekko.
• Vie, Preben Joakim Svela; Mæhlen, Jan Petter; Andersen, Hanne Flåten; Kirkengen, Martin; Lian, Torleif & Forseth, Sissel (2017). In-situ Diagnostics of Ageing Mechanisms in Li-ion Batteries using Entropy Spectroscopy and Incremental Capacity Analysis.
• Vie, Preben Joakim Svela; Mæhlen, Jan Petter; Andersen, Hanne Flåten; Kirkengen, Martin; Forseth, Sissel & Lian, Torleif [Show all 7 contributors for this article] (2017). Life and Safety for Li-ion Batteries in Maritime Conditions: The SafeLiLife - project.
• Vie, Preben Joakim Svela; Mæhlen, Jan Petter; Andersen, Hanne Flåten; Kirkengen, Martin; Lian, Torleif & Gilljam, Martin (2017). Understanding Ageing Mechanisms in Li-ion Batteries using Entropy Spectroscopy and Incremental Capacity Analysis.
• Vullum-Bruer, Fride; Kirkengen, Martin; Svensson, Ann Mari; Mokkelbost, Tommy; Mæhlen, Jan Petter & Tronstad, Ragnar [Show all 8 contributors for this article] (2017). Bindemiddel av alger kan øke rekkevidden på elbiler. [Business/trade/industry journal]. Teknisk Ukeblad.
• Svensson, Ann Mari; Mokkelbost, Tommy; Mæhlen, Jan Petter; Kirkengen, Martin; Vie, Preben Joakim Svela & Vullum-Bruer, Fride [Show all 11 contributors for this article] (2017). Stortare kan gjøre batterier mer miljøvennlig. [TV]. NRK.
• Vie, Preben Joakim Svela; Mæhlen, Jan Petter; Andersen, Hanne Flåten; Kirkengen, Martin; Lian, Torleif & Gilljam, Martin (2016). Ageing of Li-ion Batteries at Nordic Maritime Conditions – in-situ Diagnostics .
• Ulvestad, Asbjørn; Andersen, Hanne Flåten; Mæhlen, Jan Petter; Prytz, Øystein & Kirkengen, Martin (2016). Amorphous SiNx Thin Film Anodes for Li-Ion Batteries.
• Ulvestad, Asbjørn; Andersen, Hanne Flåten; Mæhlen, Jan Petter; Prytz, Øystein & Kirkengen, Martin (2016). Amorphous SiNx Thin Film Anodes for Li-Ion Batteries.
• Vie, Preben Joakim Svela; Mæhlen, Jan Petter & Kirkengen, Martin (2015). Li-ion batteries for Maritime Conditions - life and safety considerations.
• Ulvestad, Asbjørn; Mæhlen, Jan Petter; Andersen, Hanne Flåten; Xu, Chao; Prytz, Øystein & Kirkengen, Martin (2015). a-SiN:H and a-SiC:H Coated Silicon Thin Films as Anodes for Li-Ion Batteries.
• Ulvestad, Asbjørn; Mæhlen, Jan Petter; Andersen, Hanne Flåten; Gunnæs, Anette Eleonora; Prytz, Øystein & Kirkengen, Martin (2015). Characterization of PECVD-Grown a-SiC:H for use as Coating for Silicon Thin Film Anodes in Li-Ion Batteries.
• Ulvestad, Asbjørn; Andersen, Hanne Flåten; Vie, Preben Joakim Svela; Mæhlen, Jan Petter; Prytz, Øystein & Kirkengen, Martin (2015). SiN and SiC Coated Silicon Thin Films as Anodes for Li-Ion Batteries.
• Kirkengen, Martin (2007). Surface Plasmons in Solar Cells.
• Kirkengen, Martin; Bergli, Joakim & Galperin, Yuri (2007). Surface Plasmons in Solar Cells.
• Kirkengen, Martin (2017). Norske markedsmuligheter i de globale, fornybare verdikjedene. Institutt for energiteknikk. ISSN 978-82-7017-896-4. Full text in Research Archive
• Kirkengen, Martin (2013). Casu-Vasu. Theoretical estimate. Institutt for energiteknikk. ISSN 0333-2039. Full text in Research Archive
• Kirkengen, Martin (2008). Collective Electron Properties of Hopping Insulators and Hybrid Systems. Universitetet i Oslo.
• Aarhus, Lars Thore; Holmqvist, Knut; Kirkengen, Martin & Kristoffersen, Thor (2002). Generalized two-tier relevance filtering of computer game update events. Norsk Regnesentral.
• Kirkengen, Martin; Lous, Joachim & Mazaher, Shahrzade (2001). Behavior Definition Toolset - Interim Implementation.

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