Helmer Fjellvag
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Explore the profile of Helmer Fjellvag including associated specialties, affiliations and a list of published articles.
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79
Citations
321
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Recent Articles
1.
Fjellvag O, Fjellvag H
IUCrdata
. 2025 Jan;
9(Pt 12):x241179.
PMID: 39777007
Tin(IV) sulfate dihydrate, Sn(SO)·2HO, was prepared in a reflux of sulfuric acid under oxidizing conditions. Its crystal structure was determined from powder synchrotron X-ray diffraction data and is constructed of...
2.
Brennhagen A, Skurtveit A, Wragg D, Cavallo C, Sjastad A, Koposov A, et al.
Chem Mater
. 2024 Aug;
36(15):7514-7524.
PMID: 39156715
Operando characterization can reveal degradation processes in battery materials and are essential for the development of battery chemistries. This study reports the first use of quasi-simultaneous operando pair distribution function...
3.
Saha D, Slawinski W, Kumar S, Fjellvag H
Inorg Chem
. 2024 Aug;
63(33):15503-15509.
PMID: 39116313
MnAs is an interesting material due to its magnetocaloric properties, which can be utilized in magnetic refrigeration. However, despite major efforts, its magnetic refrigeration performances in the substituted forms could...
4.
Fjellvag O, Gonano B, Bernal F, Amedi S, Lyu J, Pomjakushin V, et al.
Inorg Chem
. 2024 May;
63(23):10594-10602.
PMID: 38787284
Large quantities of high-purity NHCrF have been synthesized using a wet-chemical method, and its structural chemistry and magnetic properties are investigated in detail for the first time. NHCrF is a...
5.
Brennhagen A, Skautvedt C, Cavallo C, Wragg D, Koposov A, Sjastad A, et al.
ACS Appl Mater Interfaces
. 2024 Feb;
16(10):12428-12436.
PMID: 38412363
Development of new anode materials for Na-ion batteries strongly depends on a detailed understanding of their cycling mechanism. Due to instrumental limitations, the majority of mechanistic studies focus on materials'...
6.
Hempel F, Martineau-Corcos C, Bianchini F, Fjellvag H, Arstad B
ACS Phys Chem Au
. 2023 Jul;
3(4):394-405.
PMID: 37520313
Local Na-coordination and dynamics of NaZnGaTeO; = 0.00 (NZTO), 0.05, 0.10, 0.15, 0.20, were studied by variable-temperature, Na NMR methods and DFT AIMD simulations. Structure and dynamics were probed by...
7.
Banu S L, Veerapandy V, Fjellvag H, Vajeeston P
ACS Omega
. 2023 Apr;
8(15):13799-13812.
PMID: 37091371
A fascinating transition-metal dichalcogenide (TMDC) compound, MoSe, has attracted a lot of interest in electrochemical, photocatalytic, and optoelectronic systems. However, detailed studies on the structural stability of the various MoSe...
8.
Sottmann J, Ruud A, Fjellvag O, Vaughan G, Di Michel M, Fjellvag H, et al.
Phys Chem Chem Phys
. 2023 Mar;
25(14):10184.
PMID: 36946419
Correction for '5D total scattering computed tomography reveals the full reaction mechanism of a bismuth vanadate lithium ion battery anode' by Jonas Sottmann , , 2022, , 27075-27085, https://doi.org/10.1039/D2CP03892G.
9.
Sottmann J, Ruud A, Fjellvag O, Vaughan G, Di Michel M, Fjellvag H, et al.
Phys Chem Chem Phys
. 2022 Nov;
24(44):27075-27085.
PMID: 36326039
We have used 5D synchrotron total scattering computed tomography (TSCT) to understand the cycling and possible long term deactivation mechanisms of the lithium-ion battery anode bismuth vanadate. This anode material...
10.
Zacharaki E, Bremmer G, Vajeeston P, Kalyva M, Fjellvag H, Kooyman P, et al.
Nanoscale Adv
. 2022 Sep;
2(5):1850-1853.
PMID: 36132513
Using a facile one-pot colloidal method, it is now possible to obtain monodisperse Co Re nanoparticles (NPs), with excellent control of Re stoichiometry for < 0.15. Re-incorporation in terms of...