53. Operando XRD studies on Bi2MoO6 as anode material for Na-ion batteries: Brennhagen, Anders; Cavallo, Carme; Wragg, David S.; Vajeeston, Ponniah; Sjåstad, Anja O.; Koposov, Alexey Y.; and Fjellvåg, Helmer, Nanotechnology (33) 18 2022
52. Acknowledgment to Reviewers of Batteries in 2021 A El Kharbachi, CM Costa, A Isaev, CB Breslin, A Das, C Cavallo, Energies (8) 9 2022
51. Understanding the (de) sodiation mechanisms in Na‐based batteries through Operando X‐ray methods Brennhagen, Anders; Cavallo, Carmen; Wragg, David S.; Sottmann, Jonas; Koposov, Alexey Y.; and Fjellvåg, Helmer, Batteries & Supercaps 4 (7), 1039-1063 4 2021
50. Advanced and Emerging Negative Electrodes for Li-Ion Capacitors: Pragmatism vs. Performance Lai, Samson L.; Cavallo, Carmen; Abdelhamid, Muhammad E.; Lou,MF; Koposov, Alexey Y.; Energies 14 (11), 3010 2021
49. Emerging calcium batteries L Stievano, I de Meatza, J Bitenc, C Cavallo, S Brutti, MA Navarra; Journal of Power Sources 482, 228875 18 2021
48. Effect of the Niobium Doping Concentration on the Charge Storage Mechanism of Mesoporous Anatase Beads as an Anode for High-Rate Li-Ion Batteries Cavallo, Carmen; Calcagno, Giulio, Carvalho, Rodrigo; Sadd, Matt J.; Gonano, Bruno; CM Araujo ACS Applied Energy Materials 4 (1), 215-225
47. Insights into Crystal Structure and Diffusion of Biphasic Na2Zn2TeO6: Xinyu Li, Federico Bianchini, Julia Wind, David Wragg, P. Vajeeston, Helmer Fjellvåg; ACS Appl. Mater. Interfaces 12 , 28188-28198 (2020)
46. P2 type layered solid-state electrolyte Na2Zn2TeO6: crystal structure and stacking faults Xinyu Li, Federico Bianchini, Julia Wind, P. Vajeeston, David Wragg, Helmer Fjellvåg; Journal of The Electrochemical Society 166 , A3830 (2019).
45. Layered Ionic Conductor Na2Zn2TeO6: crystal structure and stacking faults: Xinyu Li, Federico Bianchini, Julia Wind, P. Vajeeston, David Wragg, Helmer Fjellvåg; ECS Meeting Abstracts 70 , (2019).
44. Spatial dynamics of lithiation and lithium plating during high-rate operation of graphite electrodes. Finegan, Donal; Quinn, Alexander; Wragg, David; Andrew, Colclasure; Xueken, Lu; Tan, Chun; Heenan, Thomas; Jervis, Rhodri; Brett, Dan J L; Das, Supratim; Gao, Tao; Cogswell, Daniel A.; Bazant, Martin; Di Michel, Marco; Checcia, Stefano; Shearing, Paul & Smith, Kandler, Energy & Environmental Science, (2020
43. First-Principles Study of the Structural Stability and Dynamic Properties of Li2MSiO4 (M = Mn, Co, Ni) Polymorphs: Vajeeston, Ponniah; Bianchini, Federico; Fjellvag, Helmer Energies 12(2), 2019
42. Nonhexagonal Na Sublattice Reconstruction in the Super-Ionic Conductor Na2Zn2TeO6: Insights from Ab Initio Molecular Dynamics: Bianchini, F.; Fjellvag, H.; Vajeeston, P. J. Phys. Chem C 123(8), 4654-4663, 2019
41. Direct observation of reversible conversion and alloying reactions in a Bi2(MoO4)3-based lithium-ion battery anode: Ruud, Amund; Sottmann, Jonas; Vajeeston, Ponniah; Fjellvåg, Helmer J. Mater. Chem A 7(30), 17906-17913, (2019)
40. Reversibility of metal-hydride anodes in all-solid-state lithium secondary battery operating at room temperature: El Kharbachi, A.; Hu, Y.; Sorby, M. H.; Maehlen, J. P.; Vullum, P. E.; Fjellvag, H.; Hauback, B. C. Solid State Ionics 317, 263-267, 2018
39. MgH2-CoO: a conversion-type composite electrode for LiBH4-based all-solid-state lithium ion batteries: El Kharbachi, Abdelouahab; Uesato, Hiroki; Kawai, Hironori; Wenner, Sigurd; Miyaoka, Hiroki; Sorby, Magnus H.; Fjellvag, Helmer; Ichikawa, Takayuki; Hauback, Bjorn C. RSC Advances, 8(41), 23468-23474, 2018
38. Operando investigations of lithiation and delithiation processes in a BiVO4 anode material: Ruud, Amund; Sottmann, Jonas; Vajeeston, Ponniah; Fjellvåg, Helmer: Phys. Chem. Chem. Phys., 20(47), 29798-29803 (2018)
37. A first-principle study of NaMPO4 (M = Mn, Fe, Co, Ni) possible novel structures as cathode materials for sodium-ion batteries: Structural and electrochemical characterization: Bianchini, F; Fjellvag, H.; Vajeeston, P. Mater. Chem. Phys. 219, 212-221, 2018
36. Understanding Capacity Fading of MgH2 Conversion-Type Anodes via Structural Morphology Changes and Electrochemical Impedance Abdelouahab El Kharbachi, Yang Hu, Magnus H. Sørby, Per Erik Vullum, Jan Petter Mæhlen, Helmer Fjellvåg, and Bjørn C. Hauback J. Phys. Chem. C, 122 (16), 2018, 8750-59DOI: 10.1021/acs.jpcc.7b12656
35. Zooming In On Specific Components Of A Working Battery With Operando XRD/PDF Computed Tomography David S. Wragg; ESRF Scientific Highlights 2017, 126-127.
34. Lithium ionic conduction in composites of Li(BH4)0.75I0.25 and amorphous 0.75Li2S·0.25P2S5for battery applications Abdel El Kharbachi, Yang Hu, Koji Yoshida, Ponniah Vajeeston, Magnus H. Sørby, Sangryun Kim, Shin-ichi Orimo, Helmer Fjellvåg, Bjørn C. Hauback; Electrochimica Acta 278, 332-39 (2018).
33. A first-principles investigation of the Li diffusion mechanism in the super-ionic conductor lithium orthothioborate Li3BS3 structure F. Bianchini, H. Fjellvåg,P. Vajeeston, Mater. Lett. 219,186-189 (2018).
32. Particle size reduction enhance the conductivity in Li2FeSiO4 P. Vajeeston, H. Fjellvåg, Materials Letters 218 313-316 (2018).
31. A first principle comparative study of the ionic diffusivity in LiAlO2 and NaAlO2 polymorphs for solid-state battery applications Bianchini, Federico; Fjellvåg , Helmer; Vajeeston , Ponniah: Phys. Chem. Chem. Phys., 2018, 20, 9824-9832
30. Chemical Structures of Specific Sodium Ion Battery Components Determined by Operando Pair Distribution Function and X-ray Diffraction Computed Tomography. Jonas Sottmann; Marco Di Michiel; Helmer Fjellvåg; Lorenzo Malavasi; Serena Margadonna; Ponniah Vajeeston; Gavin B. M. Vaughan; David S. Wragg; Angew. Chem. Int. Ed. Engl. 56, 11385-11389, doi:10.1002/anie.201704271 (2017).
29. First-principles study of the structural stability and electrochemical properties of Na2MSiO4 (M = Mn, Fe, Co and Ni) polymorphs Bianchini , Federico; Fjellvåg , Helmer; Vajeeston , Ponniah: Physical Chemistry Chemical Physics DOI: 10.1039/c7cp01395g
28. First-principles study of structural stability, dynamical properties of Li2MSiPO4 (M = Mn, Co, Ni) polymorphs Vajeeston , Ponniah:; Bianchini , Federico; Fjellvåg , Helmer; (submitted)
27. The intriguing mechanism of phosphorus anodes for sodium ion batteries revealed by operando pair distribution function and X-ray diffraction computed tomography Sottmann, Jonas; Di Michiel, Marco; Fjellvåg, Helmer; Malavasi, Lorenzo; Margadonna, Serena; Vajeeston, Ponniah; Vaughan, Gavin; Wragg, David S., arXiv:1703.04337
26. Enhanced process and composition control for atomic layer deposition with lithium trimethylsilanolate Ruud, Amund; Miikkulainen, Ville; Fjellvåg, Helmer; Nilsen, Ola, Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films 35, 01B133 (2017)
25. Bismuth Vanadate and Molybdate: Stable Alloying Anodes for Sodium-Ion Batteries Sottmann, Jonas ; Herrmann, Matthias; Vajeeston, Ponniah; Ruud, Amund; Drathen, Christina; Emerich, Hermann; Wragg, David S.; Fjellvåg, Helmer, Chemistry of Materials 2017 (29) 2803-2810
24. First-principles study of structural stability, dynamical and mechanical properties of Li2FeSiO4 polymorphs Vajeeston, P.; Fjellvåg, H. RSC Advances 2017 (7) 16843-53
23. Electrical characterization of amorphous LiAlO2 thin films deposited by atomic layer deposition Hu, Yang; Ruud, Amund; Miikkulainen, Ville; Norby, Truls; Nilsen, Ola; Fjellvåg, Helmer RSC Advances (2016), 6(65), 60479-60486.
22. In situ synchrotron study of ordered and disordered LiMn1.5Ni0.5O4 as lithium ion battery positive electrode Samarasingha, Pushpaka B.; Sottmann, Jonas; Margadonna, Serena; Emerich, Hermann; Nilsen, Ola; Fjellvåg, Helmer; Acta Materialia (2016), 116, 290-297.
21. Versatile electrochemical cell for Li-/Na-ion batteries and high-throughput setup for combined operando X-ray diffraction and absorption spectroscopy Sottmann, Jonas; Homs-Regojo, Roberto; Wragg, David S.; Fjellvåg, Helmer; Margadonna, Serena and Emerich, Hermann; Journal of Applied Crystallography (2016), 49, 1972-1981
20. In operando Synchrotron XRD/XAS Investigation of Sodium Insertion into the Prussian Blue Analogue Cathode Material Na1.32Mn[Fe(CN)6]0.83·z H2O Sottmann, Jonas; Bernal, Fabian L. M.; Yusenko, Kirill V.; Herrmann, Matthias; Emerich, Hermann; Wragg, David S.; Margadonna, Serena Electrochimica Acta (2016), 200, 305-313.
19. A novel polytype - the stacking fault based γ-MoO3 nanobelts Slawinski, Wojciech A.; Fjellvåg, Øystein S.; Ruud, Amund; Fjellvåg, Helmer Acta Crystallographica, Section B: (2016), 72(2), 201-208.
18. How Crystallite Size Controls the Reaction Path in Nonaqueous Metal Ion Batteries: The Example of Sodium Bismuth Alloying Sottmann, Jonas; Herrmann, Matthias; Vajeeston, Ponniah; Hu, Yang; Ruud, Amund; Drathen, Christina; Emerich, Hermann; Fjellvåg, Helmer; Wragg, David S. Chemistry of Materials 2016, 28(8), 2750-2756.
17. Neutron diffraction and Raman analysis of LiMn1.5Ni0.5O4 spinel type oxides for use as lithium ion battery cathode and their capacity enhancements. Samarasingha, Pushpaka; Andersen, Niels Højmark; Sørby, Magnus Helgerud; Kumar, Susmit; Nilsen, Ola; Fjellvåg, Helmer. Solid State Ionics 2016; 284. 28-36
16. Ultra-high power capabilities in amorphous FePO4 thin films Gandrud, Knut Bjarne; Nilsen, Ola; Fjellvåg, Helmer. Journal of Power Sources 2016, 306, 454–458
15. Freeze-dryed LixMoO3 nanobelts used as cathode materials for lithium-ion batteries: A bulk and interface study. Villevieille, Claire; Gorzkowska-Sobas, Agnieszka A; Fjellvåg, Helmer; Novak, Petr. Journal of Power Sources 2015, 297, 276-282
14. Amorphous (Glassy) Carbon, a Promising Material for Sodium Ion Battery Anodes: a Combined First-Principles and Experimental Study Legrain, Fleur; Sottmann, Jonas; Kotsis, Konstantinos; Gorantla, Sandeep; Sartori, Sabrina; Manzhos, Sergei Journal of Physical Chemistry C (2015), 119(24), 13496-13501.
13. Investigation of Li+ insertion in columbite structured FeNb2O6 and rutile structured CrNb2O6 materials. Samarasingha, Pushpaka; Thomas, Christopher Ian; Fjellvåg, Helmer. Electrochimica Acta 2015; 153.232-237
12. Atomic layer deposited lithium aluminum oxide: (In)dependency of film properties from pulsing sequence. Miikkulainen, Ville; Nilsen, Ola; Li, Han; King, Sean W.; Laitinen, Mikko; Sajavaara, Timo; Fjellvåg, Helmer. Journal of Vacuum Science & Technology. A. 2015; 33.(1A101)
11. High power nano-structured V2O5 thin film cathodes by atomic layer deposition. Østreng, Erik; Gandrud, Knut Bjarne; Hu, Yang; Nilsen, Ola; Fjellvåg, Helmer. Journal of Materials Chemistry A 2014 ;Volum 2
10. Atomic layer deposition of functional films for Li-ion microbatteries Nilsen, Ola; Miikkulainen, Ville; Gandrud, Knut Bjarne; Østreng, Erik; Ruud, Amund; Fjellvåg, Helmer. Physica Status Solidi (a) applications and materials science 2013, 10544-15051
9. Atomic Layer Deposition of Spinel Lithium Manganese Oxide by Film-Body-Controlled Lithium Incorporation for Thin-Film Lithium-Ion Batteries. Miikkulainen, Ville; Ruud, Amund; Østreng, Erik; Nilsen, Ola; Timo, Sajavaara; Laitinen, Mikko; Fjellvåg, Helmer. Journal of Physical Chemistry C 2013 ; 118(2) 1258-1268
8. Atomic layer deposition of LixTiyOz thin films. Miikkulainen, Ville; Nilsen, Ola; Laitinen, Mikko; Sajavaara, Timo; Fjellvåg, Helmer. RSC Advances 2013 ;Volum 3.(20) 7537-7542
7. High-performing iron phosphate for enhanced lithium ion solid state batteries as grown by atomic layer deposition. Gandrud, Knut Bjarne; Pettersen, Anders; Nilsen, Ola; Fjellvåg, Helmer. Journal of Materials Chemistry 2013 ;Volum 1(32) 9054-9059
6. Atomic layer deposition of lithium nitride and carbonate using lithium silylamide. Østreng, Erik; Vajeeston, Ponniah; Nilsen, Ola; Fjellvåg, Helmer. RSC Advances 2012;Volum 2.(15) s. 6315-6322
5. Niobium(V) Oxynitride: Synthesis, Characterization, and Feasibility as Anode Material for Rechargeable Lithium-Ion Batteries. Wang, Xiao-Jun; Krumeich, Frank; Wörle, Michael; Nesper, Reinhard; Jantsky, Laurent; Fjellvåg, Helmer. Chemistry - A European Journal 2012;Volum 18(19) 5970-5978
4. Atomic layer deposition of LixTiyOz thin films. Miikkulainen, Ville; Nilsen, Ola; Laitinen, Mikko; Sajavaara, Timo; Fjellvåg, Helmer. RSC Advances 2013 ;Volum 3(20) 7537-7542
3. Atomic Layer Deposition of Li2O-Al2O3 Thin Films. Aaltonen, Titta; Nilsen, Ola; Magraso Sola, Anna; Fjellvåg, Helmer. Chemistry of Materials 2011 ;Volum 23.(21) s.4669-75
2. Lanthanum Titanate and Lithium Lanthanum Titanate Thin Films Grown by Atomic Layer Deposition. Aaltonen, Titta; Alnes, Mari; Nilsen, Ola; Costelle, Leila; Fjellvåg, Helmer. Journal of Materials Chemistry 2010 ; 20., 2877-2881
1. Atomic layer deposition of lithium containing thin films. Putkonen, Matti; Aaltonen, Titta Katriina; Alnes, Mari; Sajavaara, Timo; Nilsen, Ola; Fjellvåg, Helmer. J. Mat. Chem. (2009); 19(46), 8767-71