Helmer Fjellvåg

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Phone +47 22855564
Mobile phone +47 41633921
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Visiting address Sem Sælands vei 26 0371 Oslo
Postal address Postboks 1033 0315 Oslo
Tags: Energy

Publications

  • Karthikeyan, Jayakumar; Fjellvåg, Helmer; Bundli, Silje & Sjåstad, Anja Olafsen (2021). Efficient Exfoliation of Layered Double Hydroxides; Effect of Cationic Ratio, Hydration State, Anions and Their Orientations. Materials. ISSN 1996-1944. 14(2). doi: 10.3390/ma14020346.
  • Brennhagen, Anders; Cavallo, Carmen; Wragg, David; Sottmann, Jonas; Koposov, Alexey & Fjellvåg, Helmer (2021). Understanding the (De)Sodiation Mechanisms in Na‐Based Batteries through Operando X‐Ray Methods. Batteries & Supercaps. ISSN 2566-6223. 4(7), p. 1039–1063. doi: 10.1002/batt.202000294. Full text in Research Archive
  • Sønsteby, Henrik Hovde; Skaar, Erik; Fjellvåg, Helmer & Nilsen, Ola (2021). Effect of Subcycle Arrangement on Direct Epitaxy in ALD of LaNiO3. ACS Applied Electronic Materials. ISSN 2637-6113. 3(1), p. 292–298. doi: 10.1021/acsaelm.0c00855.
  • Gonano, Bruno Raymond Gino; Fjellvåg, Øystein; Steciuk, Gwladys; Guillou, Francois; Saha, Dipankar & Pelloquin, Denis [Show all 7 contributors for this article] (2021). Tuning the Magnetically Segregated Nanolayering in Mn–Ni–As Intermetallics. Chemistry of Materials. ISSN 0897-4756. 33(8), p. 3002–3010. doi: 10.1021/acs.chemmater.1c00760. Full text in Research Archive
  • Schuler, Raphael; Bianchini, Federico; Norby, Truls Eivind & Fjellvåg, Helmer (2021). Near-Broken-Gap Alignment between FeWO4 and Fe2WO6 for Ohmic Direct p–n Junction Thermoelectrics. ACS Applied Materials & Interfaces. ISSN 1944-8244. 13(6), p. 7416–7422. doi: 10.1021/acsami.0c19341.
  • Periyasamy, Manimuthu; Patra, Lokanath; Fjellvåg, Øystein; Ravindran, Ponniah; Sørby, Magnus Helgerud & Kumar, Susmit [Show all 8 contributors for this article] (2021). Effect of electron doping on the crystal structure and physical properties of an n = 3 Ruddlesden-Popper compound La4Ni3O10. ACS Applied Electronic Materials. ISSN 2637-6113. 3(6), p. 2671–2684. doi: 10.1021/acsaelm.1c00270. Full text in Research Archive
  • Saha, Dipankar; Kumar, Susmit; Gonano, Bruno Raymond Gino; Sjåstad, Anja Olafsen & Fjellvåg, Helmer (2021). Total Scattering Study of Local Structural Changes in MnAs1-xPx Influenced by Magnetic Interactions. Chemistry of Materials. ISSN 0897-4756. 33, p. 2576–2584. doi: 10.1021/acs.chemmater.1c00128.
  • Bernal, Fabian Leonardo Martinez; Lundvall, Fredrik; Kumar, Susmit; Hansen, Per-Anders S.; Wragg, David S. & Fjellvåg, Helmer [Show all 7 contributors for this article] (2021). Jahn-Teller active fluoroperovskites ACrF3 (A=Na+, K+): Magnetic and thermo-optical properties. PHYSICAL REVIEW MATERIALS. ISSN 2475-9953. 5(6). doi: 10.1103/PhysRevMaterials.5.064420.
  • Zacharaki, Eirini; Bremmer, Marien G.; Vajeeston, Ponniah; Kalyva, Maria Evangelou; Fjellvåg, Helmer & Kooyman, Patricia J. [Show all 7 contributors for this article] (2020). One-pot synthesis of cobalt-rhenium nanoparticles taking the unusual beta-Mn type structure. Nanoscale Advances. 2, p. 1850–1853. doi: 10.1039/d0na00097c. Full text in Research Archive
  • Bratvold, Jon E.; Fjellvåg, Helmer & Nilsen, Ola (2020). Phase and Orientation Control of NiTiO3 Thin Films. Materials. ISSN 1996-1944. 13(1), p. 1–19. doi: 10.3390/ma13010112. Full text in Research Archive
  • Periyasamy, Manimuthu; Fjellvåg, Øystein; Fjellvåg, Helmer & Sjåstad, Anja Olafsen (2020). Coupling of magnetoresistance switching and glassy magnetic state at the metal–insulator transition in Ruddlesden-Popper manganite Ca4Mn3O10. Journal of Magnetism and Magnetic Materials. ISSN 0304-8853. 511, p. 1–8. doi: 10.1016/j.jmmm.2020.166949. Full text in Research Archive
  • El-Kharbachi, Abdelouahab; Wind, Julia; Ruud, Amund; Høgset, Astrid Bygdås; Nygård, Magnus Moe & Zhang, Junxian [Show all 14 contributors for this article] (2020). Pseudo-ternary LiBH4-LiCl-P2S5 system as structurally disordered bulk electrolyte for all-solid-state lithium batteries. Physical Chemistry, Chemical Physics - PCCP. ISSN 1463-9076. 22(25), p. 13872–13879. doi: 10.1039/d0cp01334j. Full text in Research Archive
  • Bernal, Fabian Leonardo Martinez; Sottmann, Jonas; Wragg, David; Fjellvåg, Helmer; Fjellvåg, Øystein & Drathen, Christina [Show all 8 contributors for this article] (2020). Structural and magnetic characterization of the elusive Jahn-Teller active NaCrF3. PHYSICAL REVIEW MATERIALS. ISSN 2475-9953. 4(5). doi: 10.1103/PhysRevMaterials.4.054412. Full text in Research Archive
  • Gonano, Bruno Raymond Gino; Fjellvåg, Øystein; Steciuk, Gwladys; Saha, Dipankar; Pelloquin, Denis & Fjellvåg, Helmer (2020). Exotic Compositional Ordering in Manganese–Nickel–Arsenic (Mn-Ni-As) Intermetallics. Angewandte Chemie International Edition. ISSN 1433-7851. 132(50), p. 22568–22573. doi: 10.1002/anie.202006135. Full text in Research Archive
  • Sønsteby, Henrik Hovde; Bratvold, Jon Einar; Killi, Veronica Anne-Line Kathrine; Choudhury, Devika; Elam, Jeffrey W. & Fjellvåg, Helmer [Show all 7 contributors for this article] (2020). tert-butoxides as precursors for atomic layer deposition of alkali metal containing thin films. Journal of Vacuum Science & Technology. A. Vacuum, Surfaces, and Films. ISSN 0734-2101. 38, p. 1–15. doi: 10.1116/6.0000589. Full text in Research Archive
  • Sønsteby, Henrik Hovde; Skaar, Erik; Fjellvåg, Øystein; Bratvold, Jon E.; Fjellvåg, Helmer & Nilsen, Ola (2020). A foundation for complex oxide electronics -low temperature perovskite epitaxy. Nature Communications. ISSN 2041-1723. 11(1). doi: 10.1038/s41467-020-16654-2. Full text in Research Archive
  • Li, Xinyu; Bianchini, Federico; Wind, Julia; Pettersen, Christine; Vajeeston, Ponniah & Wragg, David [Show all 7 contributors for this article] (2020). Insights into Crystal Structure and Diffusion of Biphasic Na2Zn2TeO6. ACS Applied Materials & Interfaces. ISSN 1944-8244. 12(25), p. 28188–28198. doi: 10.1021/acsami.0c05863. Full text in Research Archive
  • Hu, Yang; Miikkulainen, Ville; Mizohata, Kenichiro; Norby, Truls Eivind; Nilsen, Ola & Fjellvåg, Helmer (2020). Ionic conductivity in LixTaOy thin films grown by Atomic Layer Deposition (ALD). Electrochimica Acta. ISSN 0013-4686. 361. doi: 10.1016/j.electacta.2020.137019. Full text in Research Archive
  • Pal, Santosh Kumar; Frommen, Christoph; Kumar, Susmit; Hauback, Bjørn; Fjellvåg, Helmer & Helgesen, Geir (2020). Enhancing giant magnetocaloric effect near room temperature by inducing magnetostructural coupling in Cu-doped MnCoGe. Materials & design. ISSN 0264-1275. 195, p. 1–11. doi: 10.1016/j.matdes.2020.109036. Full text in Research Archive
  • Dietzel, Pascal D.C.; Blom, Richard & Fjellvåg, Helmer (2020). Variability in the formation and framework polymorphism of metal-organic frameworks based on yttrium(III) and the bifunctional organic linker 2,5-dihydroxyterephthalic acid. Zeitschrift für Anorganische und Allgemeines Chemie. ISSN 0044-2313. 647(1), p. 15–25. doi: 10.1002/zaac.202000276. Full text in Research Archive
  • Sønsteby, Henrik Hovde; Killi, Veronica Anne-Line Kathrine; Storaas, Thomas Aarflot; Choudhuy, Devika; Elam, Jeffrey W. & Fjellvåg, Helmer [Show all 7 contributors for this article] (2020). Understanding KOtBu in atomic layer deposition–in situ mechanistic studies of the KNbO3 growth process. Dalton Transactions. ISSN 1477-9226. doi: 10.1039/D0DT02324H.
  • Sønsteby, Henrik Hovde; Skaar, Erik; Bratvold, Jon Einar; Freeland, John W.; Yanguas-Gil, Angel & Elam, Jeffrey W. [Show all 8 contributors for this article] (2020). Tuning electronic properties in LaNiO3 thin films by B-site Cu-substitution. Journal of Materials Chemistry C. ISSN 2050-7526. 8, p. 12662–12668. doi: 10.1039/D0TC03406A.
  • Duparc, Marion Jeanne Louise; Sønsteby, Henrik Hovde; Nilsen, Ola; Sjåstad, Anja Olafsen & Fjellvåg, Helmer (2020). Atomic Layer Deposition of GdCoO3 and Gd0.9Ca0.1CoO3. Materials. ISSN 1996-1944. 13(1), p. 1–10. doi: 10.3390/ma13010024. Full text in Research Archive
  • Schuler, Raphael; Norby, Truls Eivind & Fjellvåg, Helmer (2020). Defects and polaronic electron transport in Fe2WO6. Physical Chemistry, Chemical Physics - PCCP. ISSN 1463-9076. 22(27), p. 15541–15548. doi: 10.1039/d0cp01588a. Full text in Research Archive
  • Arstad, Bjørnar; Blom, Richard; Håkonsen, Silje Fosse; Pierchala, Joanna; Cobden, Paul & Lundvall, Fredrik [Show all 10 contributors for this article] (2020). Synthesis and Evaluation of K-Promoted Co3-xMgxAl-Oxides as Solid CO2 Sorbents in the Sorption-Enhanced Water−Gas Shift (SEWGS) Reaction. Industrial & Engineering Chemistry Research. ISSN 0888-5885. 59(40), p. 17837–17844. doi: 10.1021/acs.iecr.0c02322. Full text in Research Archive
  • Kalantzopoulos, Georgios N.; Lundvall, Fredrik; Thorshaug, Knut; Lind, Anna Maria; Vajeeston, Ponniah & Dovgaliuk, Iurii [Show all 9 contributors for this article] (2020). Factors Determining Microporous Material Stability in Water: The Curious Case of SAPO-37. Chemistry of Materials. ISSN 0897-4756. 32(4), p. 1495–1505. doi: 10.1021/acs.chemmater.9b04510. Full text in Research Archive
  • Dietzel, Pascal D.C.; Georgiev, Peter A.; Frøseth, Morten; Johnsen, Rune E.; Fjellvåg, Helmer & Blom, Richard (2020). Effect of larger pore size on the sorption properties of isoreticular metal–organic frameworks with high number of open metal sites. Chemistry - A European Journal. ISSN 0947-6539. 26, p. 13523–13531. doi: 10.1002/chem.202001825. Full text in Research Archive
  • Bernal, Fabian Leonardo Martinez; Gonano, Bruno Raymond Gino; Lundvall, Fredrik; Wragg, David; Fjellvåg, Helmer & Veillon, Fabien [Show all 8 contributors for this article] (2020). Canted antiferromagnetism in high-purity NaFeF3 prepared by a novel wet-chemical synthesis method. PHYSICAL REVIEW MATERIALS. ISSN 2475-9953. 4(11). doi: 10.1103/PhysRevMaterials.4.114412. Full text in Research Archive
  • Fjellvåg, Øystein; Ruud, Amund; Sønsteby, Henrik Hovde; Nilsen, Ola & Fjellvåg, Helmer (2020). Crystallization, Phase Stability, and Electrochemical Performance of β-MoO3 Thin Films. Crystal Growth & Design. ISSN 1528-7483. 20(6), p. 3861–3866. doi: 10.1021/acs.cgd.0c00156. Full text in Research Archive
  • Pal, Santosh Kumar; Frommen, Christoph; Kumar, Susmit; Hauback, Bjørn; Fjellvåg, Helmer & Woodcock, T. G. [Show all 8 contributors for this article] (2019). Comparative phase transformation and magnetocaloric effect study of Co and Mn substitution by Cu in MnCoGe compounds. Journal of Alloys and Compounds. ISSN 0925-8388. 775, p. 22–29. doi: 10.1016/j.jallcom.2018.10.040. Full text in Research Archive
  • Lundvall, Fredrik; Kalantzopoulos, Georgios N.; Wragg, David; Arstad, Bjørnar; Blom, Richard & Sjåstad, Anja Olafsen [Show all 7 contributors for this article] (2019). Characterization and evaluation of synthetic Dawsonites as CO2 sorbents. Fuel. ISSN 0016-2361. 236, p. 747–754. doi: 10.1016/j.fuel.2018.09.057. Full text in Research Archive
  • Patra, Lokanath; Vidya, Ravindran; Fjellvåg, Helmer & Ravindran, Ponniah (2019). Giant Magnetoelectric Coupling in Multiferroic PbTi1–xVxO3 from Density Functional Calculations. ACS Omega. ISSN 2470-1343. doi: 10.1021/acsomega.9b01176.
  • Li, Xinyu; Bianchini, Federico; Wind, Julia; Vajeeston, Ponniah; Wragg, David & Fjellvåg, Helmer (2019). P2 Type Layered Solid-State Electrolyte Na2Zn2TeO6: Crystal Structure and Stacking Faults . Journal of the Electrochemical Society. ISSN 0013-4651. 166(15), p. A3830–A3837. doi: 10.1149/2.1231915jes.
  • Ruud, Amund; Sottmann, Jonas; Vajeeston, Ponniah & Fjellvåg, Helmer (2019). Direct observation of reversible conversion and alloying reactions in a Bi2(MoO4)3-based lithium-ion battery anode. Journal of Materials Chemistry A. ISSN 2050-7488. 7(30), p. 17906–17913. doi: 10.1039/c9ta03459e.
  • Sønsteby, Henrik Hovde; Nilsen, Ola & Fjellvåg, Helmer (2019). Chemical Uniformity in Ferroelectric KxNa1−xNbO3 Thin Films. Global Challenges. ISSN 2056-6646. 3(10). doi: 10.1002/gch2.201800114. Full text in Research Archive
  • Vajeeston, Ponniah; Bianchini, Federico & Fjellvåg, Helmer (2019). First-Principles Study of the Structural Stability and Dynamic Properties of Li2MSiO4 (M = Mn, Co, Ni) Polymorphs . Energies. ISSN 1996-1073. 12(224), p. 1–24. doi: 10.3390/en12020224. Full text in Research Archive
  • Bianchini, Federico; Fjellvåg, Helmer & Vajeeston, Ponniah (2019). Nonhexagonal Na Sublattice Reconstruction in the Super-Ionic Conductor Na2Zn2TeO6: Insights from Ab Initio Molecular Dynamics . Journal of Physical Chemistry C. ISSN 1932-7447. 123(8), p. 4654–4663. doi: 10.1021/acs.jpcc.8b10362.
  • Bratvold, Jon E.; Sønsteby, Henrik Hovde; Nilsen, Ola & Fjellvåg, Helmer (2019). Control of growth orientation in as-deposited epitaxial iron-rich nickel ferrite spinel. Journal of Vacuum Science & Technology. A. Vacuum, Surfaces, and Films. ISSN 0734-2101. 37(2), p. 1–7. doi: 10.1116/1.5082012. Full text in Research Archive
  • Kumar, Susmit; Waller, David; Fjellvåg, Helmer & Sjåstad, Anja Olafsen (2019). Development of custom made bimetallic alloy model systems based on platinum-rhodium for heterogeneous catalysis. Journal of Alloys and Compounds. ISSN 0925-8388. 786, p. 1021–1029. doi: 10.1016/j.jallcom.2019.02.026. Full text in Research Archive
  • Kumar, Susmit; Fjellvåg, Øystein; Sjåstad, Anja Olafsen & Fjellvåg, Helmer (2019). Physical properties of Ruddlesden-Popper (n = 3) nickelate: La4Ni3O10. Journal of Magnetism and Magnetic Materials. ISSN 0304-8853. 496. doi: 10.1016/j.jmmm.2019.165915. Full text in Research Archive
  • Varunaa, R; Fjellvåg, Helmer & Ponniah, Ravindran (2019). Zinc substituted MgH2 - a potential material for hydrogen storage applications. International Journal of Hydrogen Energy. ISSN 0360-3199. 44(26), p. 13632–13646. doi: 10.1016/j.ijhydene.2019.04.016.
  • Kiruthika, S.; Fjellvåg, Helmer & Ravindran, P. (2019). Amphoteric behavior of hydrogen (H+1 and H-1) in complex hydrides from van der Waals interaction-including ab initio calculations. Journal of Materials Chemistry A. ISSN 2050-7488. 7(11), p. 6228–6240. doi: 10.1039/c8ta11685g.
  • Sønsteby, Henrik Hovde; Wind, Julia; Jensen, Martin; Storaas, Thomas Aarflot; Chernyshov, Dmitry & Fjellvåg, Helmer (2019). In situ synchrotron X-ray diffraction of thin films under perturbation by an electric field. Ferroelectrics (Print). ISSN 0015-0193. 537, p. 20–26. doi: 10.1080/00150193.2018.1528953.
  • Bundli, Silje; Dhak, Prasanta; Jensen, Martin; Gunnæs, Anette Eleonora; Nguyen, Phuong Dan & Fjellvåg, Helmer [Show all 7 contributors for this article] (2019). Controlled alloying of Pt-Rh nanoparticles by the polyol approach. Journal of Alloys and Compounds. ISSN 0925-8388. 779, p. 879–885. doi: 10.1016/j.jallcom.2018.11.301.
  • El-Kharbachi, Abdelouahab; Hu, Yang; Yoshida, Koji; Vajeeston, Ponniah; Kim, Sangryun & Sørby, Magnus Helgerud [Show all 9 contributors for this article] (2018). Lithium ionic conduction in composites of Li(BH4)0.75I0.25 and amorphous 0.75Li2S·0.25P2S5 for battery applications. Electrochimica Acta. ISSN 0013-4686. 278, p. 332–339. doi: 10.1016/j.electacta.2018.05.041. Full text in Research Archive
  • Sønsteby, Henrik Hovde; Bratvold, Jon E.; Weibye, Kristian; Fjellvåg, Helmer & Nilsen, Ola (2018). Phase Control in Thin Films of Layered Cuprates. Chemistry of Materials. ISSN 0897-4756. 30(3), p. 1095–1101. doi: 10.1021/acs.chemmater.7b05005.
  • Ruud, Amund; Sottmann, Jonas; Vajeeston, Ponniah & Fjellvåg, Helmer (2018). Operando Investigations of Lithiation and Delithiation Processes in the BiVO4 Anode Material . Physical Chemistry, Chemical Physics - PCCP. ISSN 1463-9076. 47, p. 29798–29803. doi: 10.1039/c8cp05330h. Full text in Research Archive
  • Sønsteby, Henrik Hovde; Aarholt, Thomas; Prytz, Øystein; Fjellvåg, Helmer & Nilsen, Ola (2018). First Complex Oxide Superconductor by Atomic Layer Deposition. Chemical Communications. ISSN 1359-7345. 54(59), p. 8253–8256. doi: 10.1039/c8cc04998j.
  • El-Kharbachi, Abdelouahab; Uesato, Hiroki; Kawai, Hironori; Wenner, Sigurd; Miyaoka, Hiroki & Sørby, Magnus Helgerud [Show all 9 contributors for this article] (2018). MgH2–CoO: a conversion-type composite electrode for LiBH4-based all-solid-state lithium ion batteries. RSC Advances. ISSN 2046-2069. 8(41), p. 23468–23474. doi: 10.1039/c8ra03340d. Full text in Research Archive
  • Bianchini, Federico; Fjellvåg, Helmer & Vajeeston, Ponniah (2018). A first principle comparative study of the ionic diffusivity in LiAlO2 and NaAlO2 polymorphs for solid-state battery applications. Physical Chemistry, Chemical Physics - PCCP. ISSN 1463-9076. 20(15), p. 9824–9832. doi: 10.1039/c8cp00715b.
  • Bianchini, Federico; Fjellvåg, Helmer & Vajeeston, Ponniah (2018). A first-principle study of NaMPO4(M = Mn, Fe, Co, Ni) possible novelstructures as cathode materials for sodium-ion batteries: Structural andelectrochemical characterisation. Materials Chemistry and Physics. ISSN 0254-0584. 219, p. 212–221. doi: 10.1016/j.matchemphys.2018.08.007. Full text in Research Archive
  • Zheng, Jian; Ivashenko, Oleksii; Fjellvåg, Helmer; Groot, Irene M. N. & Sjåstad, Anja Olafsen (2018). Roadmap for Modeling RhPt/Pt(111) Catalytic Surfaces. Journal of Physical Chemistry C. ISSN 1932-7447. 122(46), p. 26430–26437. doi: 10.1021/acs.jpcc.8b08124.
  • Bianchini, Federico; Fjellvåg, Helmer & Vajeeston, Ponniah (2018). A first-principles investigation of the Li difusion mechanism in the super-ionic conductor lithium orthothioborate Li3BS3 structure. Materials Letters. ISSN 0167-577X. 219, p. 186–189. doi: 10.1016/j.matlet.2018.02.083. Full text in Research Archive
  • Kalantzopoulos, Georgios N.; Lundvall, Fredrik; Checchia, Stefano; Lind, Anna Maria; Wragg, David & Fjellvåg, Helmer [Show all 7 contributors for this article] (2018). In Situ Flow MAS NMR Spectroscopy and Synchrotron PDF Analyses of the Local Response of the Brønsted Acidic Site in SAPO-34 during Hydration at Elevated Temperatures. ChemPhysChem. ISSN 1439-4235. 19(4), p. 519–528. doi: 10.1002/cphc.201700973.
  • Vajeeston, Ponniah; Fjellvåg, Helmer & Nilsen, Ola (2018). Search for potential precursors for Si-atomic layer deposition- a quantum chemical study. Materials Letters. ISSN 0167-577X. 216, p. 189–192. doi: 10.1016/j.matlet.2018.01.040. Full text in Research Archive
  • El-Kharbachi, Abdelouahab; Hu, Yang; Sørby, Magnus Helgerud; Mæhlen, Jan Petter; Vullum, Per Erik & Fjellvåg, Helmer [Show all 7 contributors for this article] (2018). Reversibility of metal-hydride anodes in all-solid-state lithium secondary battery operating at room temperature. Solid State Ionics. ISSN 0167-2738. 317, p. 263–267. doi: 10.1016/j.ssi.2018.01.037. Full text in Research Archive
  • Slawinski, Wojciech Andrzej; Zacharaki, Eirini; Fjellvåg, Helmer & Sjåstad, Anja Olafsen (2018). Structural Arrangement in Close-Packed Cobalt Polytypes. Crystal Growth & Design. ISSN 1528-7483. 18(4), p. 2316–2325. doi: 10.1021/acs.cgd.7b01736.
  • El-Kharbachi, Abdelouahab; Hu, Yang; Sørby, Magnus Helgerud; Vullum, Per Erik; Mæhlen, Jan Petter & Fjellvåg, Helmer [Show all 7 contributors for this article] (2018). Understanding Capacity Fading of MgH2 Conversion-Type Anodes via Structural Morphology Changes and Electrochemical Impedance. Journal of Physical Chemistry C. ISSN 1932-7447. 122(16), p. 8750–8759. doi: 10.1021/acs.jpcc.7b12656. Full text in Research Archive
  • Getz, Michael; Hansen, Per-Anders; Ahmed, Mohammed Amin Karim; Fjellvåg, Helmer & Nilsen, Ola (2017). Luminescent YbVO4 by atomic layer deposition. Dalton Transactions. ISSN 1477-9226. 46(9), p. 3008–3013. doi: 10.1039/c7dt00253j. Full text in Research Archive
  • Ruud, Amund; Miikkulainen, Ville; Mizohata, Kenichiro; Fjellvåg, Helmer & Nilsen, Ola (2017). Enhanced process and composition control for atomic layer deposition with lithium trimethylsilanolate . Journal of Vacuum Science & Technology. A. Vacuum, Surfaces, and Films. ISSN 0734-2101. 35(1). doi: 10.1116/1.4972209.
  • Getz, Michael; Hansen, Per-Anders; Fjellvåg, Helmer & Nilsen, Ola (2017). Luminescent properties of europium titanium phosphate thin films deposited by atomic layer deposition. RSC Advances. ISSN 2046-2069. 7(13), p. 8051–8059. doi: 10.1039/c6ra27644j. Full text in Research Archive
  • Slawinski, Wojciech Andrzej; Okamoto, Hiroshi & Fjellvåg, Helmer (2017). Triclinic crystal structure distortion of multiferroic BiMn7O12. Acta Crystallographica. Section B: Structural Science, Crystal Engineering and Materials. ISSN 2052-5192. 73(2), p. 313–320. doi: 10.1107/S2052520617000725.
  • Sottmann, Jonas; Herrmann, Matthias; Vajeeston, Ponniah; Ruud, Amund; Drathen, Christina & Emerich, Hermann [Show all 8 contributors for this article] (2017). Bismuth Vanadate and Molybdate: Stable Alloying Anodes for Sodium-Ion Batteries. Chemistry of Materials. ISSN 0897-4756. 29(7), p. 2803–2810. doi: 10.1021/acs.chemmater.6b04699.
  • Kalantzopoulos, Georgios N.; Lundvall, Fredrik; Lind, Anna Maria; Arstad, Bjørnar; Chernyshov, Dmitry & Fjellvåg, Helmer [Show all 7 contributors for this article] (2017). SAPO-37 microporous catalysts: revealing the structural transformations during template removal. Catalysis, Structure & Reactivity. ISSN 2055-0758. 3(1-2), p. 79–88. doi: 10.1080/2055074X.2016.1262569. Full text in Research Archive
  • Periyasamy, Manimuthu; Sjåstad, Anja Olafsen & Fjellvåg, Helmer (2017). Colossal Positive Magnetoresistance in Oxygen-Deficient Ca4Mn3O10. IEEE transactions on magnetics. ISSN 0018-9464. 53(11), p. 1–4. doi: 10.1109/TMAG.2017.2729895.
  • Nagell, Marius Uv; Slawinski, Wojciech Andrzej; Vajeeston, Ponniah; Fjellvåg, Helmer & Sjåstad, Anja Olafsen (2017). Temperature induced transitions in La-4(Co1-xNix)(3)O-10 (+) (delta); oxygen stoichiometry and mobility. Solid State Ionics. ISSN 0167-2738. 305, p. 7–15. doi: 10.1016/j.ssi.2017.04.006.
  • Lundvall, Fredrik; Kalantzopoulos, Georgios N.; Wragg, David; Arstad, Bjørnar; Blom, Richard & Sjåstad, Anja Olafsen [Show all 7 contributors for this article] (2017). Thermogravimetric Analysis – A Viable Method for Screening Novel Materials for the Sorbent Enhanced Water-gas Shift Process. Energy Procedia. ISSN 1876-6102. 114, p. 2294–2303. doi: 10.1016/j.egypro.2017.03.1372. Full text in Research Archive
  • Sønsteby, Henrik Hovde; Fjellvåg, Helmer & Nilsen, Ola (2017). Functional perovskites by atomic layer deposition - an overview. Advanced Materials Interfaces. ISSN 2196-7350. 4:1600903, p. 1–15. doi: 10.1002/admi.201600903.

View all works in Cristin

  • Brennhagen, Anders; Cavallo, Carmen; Wragg, David Stephen; Sjåstad, Anja Olafsen; Ponniah, Vajeeston & Fjellvåg, Helmer (2021). Operando XRD studies on Bi2MoO6 as anode material for Na-ion batteries.
  • Brennhagen, Anders; Cavallo, Carmen; Wragg, David; Vajeeston, Ponniah; Sjåstad, Anja Olafsen & Fjellvåg, Helmer (2021). Bi4V2O11/RGO composite as conversion and alloying anode for Na-ion batteries.
  • Brennhagen, Anders; Wragg, David; Fjellvåg, Helmer; Vajeeston, Ponniah; Sjåstad, Anja Olafsen & Cavallo, Carmen (2021). Beyond Insertion: Conversion alloying Bi/RGO-based materials as novel anodes for Na-ion batteries.
  • Brennhagen, Anders; Cavallo, Carmen; Wragg, David Stephen; Koposov, Alexey; Ponniah, Vajeeston & Sjåstad, Anja Olafsen [Show all 7 contributors for this article] (2021). Operando XRD study on Bi2MoO6 as anode material for Na-ion batteries.
  • Hval, Halvor Høen; Tripathi, Alok Mani; Forseth, Sissel & Fjellvåg, Helmer (2020). Understanding the details of crystal structure and electronic states in LNMO.
  • Hempel, Frida Sveen; Arstad, Bjørnar & Fjellvåg, Helmer (2020). Layered hexagonal materials - Differences in ionic conductivity for solid-state electrolyte .
  • Wragg, David; Fjellvåg, Øystein; Fjellvåg, Helmer; Sottmann, Jonas; Vaughan, Gavin B M & Di Michel, Marco [Show all 7 contributors for this article] (2020). Operando Total Scattering Computed Tomography: Making the Invisible Visible .
  • Fjellvåg, Øystein; Sønsteby, Henrik Hovde; Nilsen, Ola; Wolff, Max; Kapaklis, Vassilios & Fjellvåg, Helmer [Show all 8 contributors for this article] (2020). Towards Multiferroic Thin Film Composites by Atomic Layer Deposition (ALD) .
  • Cavallo, Carmen; Brennhagen, Anders; Wragg, David & Fjellvåg, Helmer (2020). Beyond Insertion: Conversion alloying Bi/RGO-based materials as anode for Na-ion batteries .
  • Hval, Halvor Høen; Ruud, Amund; Forseth, Sissel; Emerich, Hermann; Nilsen, Ola & Fjellvåg, Helmer (2019). Operando investigation of batteries.
  • Hval, Halvor Høen; Tripathi, Alok Mani; Ruud, Amund; Emerich, Hermann; Forseth, Sissel & Nilsen, Ola (2019). Make Batteries Safe Again.
  • Hval, Halvor Høen; Tripathi, Alok Mani & Fjellvåg, Helmer (2019). High Energy Density Electrodes for Lithium-ion Batteries and Operando Studies.
  • Hval, Halvor Høen; Tripathi, Alok Mani; Ruud, Amund; Emerich, Hermann; Forseth, Sissel & Nilsen, Ola (2019). Make Batteries Safe Again.
  • Hempel, Frida Sveen; Arstad, Bjørnar; Fjellvåg, Helmer & Li, Xinyu (2019). Na-dynamics in Na2Zn2TeO6, a possible solid-state electrolyte.
  • Wragg, David; Ruud, Amund; Fjellvåg, Øystein; Fjellvåg, Helmer; lebedev, Oleg & Di Michel, Marco [Show all 9 contributors for this article] (2019). PDF Analysis of Batteries Using Diffraction Computed Tomography.
  • Wragg, David; Fjellvåg, Øystein; Ruud, Amund; Fjellvåg, Helmer; Vajeeston, Ponniah & Vaughan, Gavin B M [Show all 9 contributors for this article] (2019). XRD/PDF computed tomography and how to get the best possible operando data from ion batteries.
  • Wragg, David; Ruud, Amund; Fjellvåg, Helmer; Fjellvåg, Øystein; Vajeeston, Ponniah & Sottmann, Jonas [Show all 9 contributors for this article] (2019). PDF Analysis of Batteries Using Diffraction Computed Tomography.
  • El-Kharbachi, Abdelouahab; Høgset, A.; Kim, Sangryun; Vajeeston, Ponniah; Sørby, Magnus Helgerud & Fjellvåg, Helmer [Show all 8 contributors for this article] (2018). Structural and Electrochemical Study of Mixtures of Halogenated-LiBH4 and Amorphous 0.75Li2S·0.25P2S5 for Li- Conducting Solid Electrolytes.
  • Kalantzopoulos, Georgios N.; Lundvall, Fredrik; Nyborg Broge, Nils Lau; Søndergaard-Pedersen, Frederik M; Lind, Anna Maria & Arstad, Bjørnar [Show all 9 contributors for this article] (2018). Real-Time Evolution of SAPO Catalysts' Local Coordination during Hydrothermal Treatment.
  • Hval, Halvor Høen; Ruud, Amund; Forseth, Sissel; Emerich, Hermann; Nilsen, Ola & Fjellvåg, Helmer (2018). Operando investigation of batteries.
  • Hval, Halvor Høen; Ruud, Amund; Forseth, Sissel; Emerich, Hermann; Nilsen, Ola & Fjellvåg, Helmer (2018). Operando investigation of batteries.
  • Wragg, David; Ruud, Amund; Sottmann, Jonas; Vajeeston, Ponniah; Fjellvåg, Helmer & Fjellvåg, Øystein [Show all 8 contributors for this article] (2018). New Anodes for Sodium and Lithium Ion Batteries.
  • Wragg, David; Sottmann, Jonas; Ruud, Amund; Fjellvåg, Helmer; Fjellvåg, Øystein & Vajeeston, Ponniah [Show all 9 contributors for this article] (2018). Operando X-ray Diffraction Studies of Battery Materials.
  • Schuler, Raphael; Fjellvåg, Helmer & Norby, Truls Eivind (2021). Oxide thermoelectrics - materials, junctions and modules. Matematisk Naturvitenskapelig fakultet, Universitetet i Oslo. ISSN 1501-7710. 2021(2364).
  • Li, Xinyu; Fjellvåg, Helmer & Nilsen, Ola (2020). Na-Based Layered Tellurate Na2M2TeO6 (M = Zn, Mg): Synthesis, Crystal Structure and Na+ Ion Diffusion . Matematisk Naturvitenskapelig fakultet, Universitetet i Oslo.
  • Nygård, Magnus Moe; Hauback, Bjørn Christian; Sørby, Magnus Helgerud & Fjellvåg, Helmer (2020). Local and average structure in high-entropy alloys and associated metal deuterides. Matematisk Naturvitenskapelig fakultet, Universitetet i Oslo. ISSN 1501-7710. 2020( 2305).
  • Perizat, Berdiyeva; Hauback, Bjørn Christian; Deledda, Stefano & Fjellvåg, Helmer (2020). Characterization of Heat Storage Materials with Neutron Scattering and Imaging Techniques. Matematisk Naturvitenskapelig fakultet, Universitetet i Oslo. ISSN 1501-7710. 2020(2304).
  • Skaar, Erik; Fjellvåg, Helmer & Sønsteby, Henrik Hovde (2019). Structure-Property Relations in Thin Films of LaNiO3 and LaNi1-xCuxO3. Kjemisk institutt, Universitetet i Oslo.
  • Bakke, Ingrid Marie Bergh; Fjellvåg, Helmer & Sjåstad, Anja Olafsen (2018). Struktur og magnetiske egenskaper til de perovskittliknende oksidene ACo0,5B0,5O3 (A = Y, La, Nd; B = Ti, Fe, Ni). Kjemisk institutt, Universitetet i Oslo.
  • Zacharaki, Eirini; Sjåstad, Anja Olafsen & Fjellvåg, Helmer (2018). Synthesis and Characterization of Colloidal Co, Co-Re and Ni Nanoparticles for Catalysis. Universitetet i Oslo. ISSN 1501-7710.
  • Liu, Xin; Haugsrud, Reidar; Bjørheim, Tor Svendsen & Fjellvåg, Helmer (2018). Defect, Stability and Transport in Oxyhydrides. Universitetet i Oslo. ISSN 1501-7710.

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Published Nov. 17, 2010 2:55 PM - Last modified July 27, 2017 1:11 PM