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  • 1.
    Colbin, Lars Olow Simon
    et al.
    Uppsala university, Sweden.
    Hall, Charles Aram
    Uppsala university, Sweden.
    Etman, Ahmed
    RISE Research Institutes of Sweden, Bioekonomi och hälsa, Material- och ytdesign. Uppsala university, Sweden.
    Buckel, Alexander
    Altris AB, Sweden.
    Nyholm, Leif
    Uppsala university, Sweden.
    Younesi, Reza
    Uppsala university, Sweden.
    Anodic dissolution of aluminum in non-aqueous electrolyte solutions for sodium-ion batteries2023Ingår i: Energy Advances, E-ISSN 2753-1457, Vol. 3, nr 1, s. 143-Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Anodic dissolution of aluminum (commonly called aluminum corrosion) is a potential issue in sodium-ion batteries. Herein, it is demonstrated how different sodium-ion battery electrolyte solutions affect this phenomenon. The type of electrolyte was critical for the presence of anodic dissolution, while the solvent appeared to alter the dissolution process. 

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  • 2.
    Grund Bäck, Lina
    et al.
    RISE - Research Institutes of Sweden (2017-2019), Samhällsbyggnad, Byggteknik. Linneaus Univerrsity, Sweden.
    Ali, Sharafat
    Linnaeus University, Sweden.
    Karlsson, Stefan
    RISE - Research Institutes of Sweden (2017-2019), Samhällsbyggnad, Byggteknik. University of Jena, Germany.
    Wondraczek, Lothar
    University of Jena, Germany.
    Jonson, Bo
    Linnaeus University, Sweden.
    X-ray and UV–Vis-NIR absorption spectroscopy studies of the Cu (I) and Cu (II) coordination environments in mixed alkali-lime-silicate glasses2019Ingår i: Journal of Non-Crystalline Solids: X, ISSN 2590-1591, Vol. 3, artikel-id 100029Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The local structures of Cu(I) and Cu(II) in (20-x)Na2O-xK2O-10CaO-70SiO2 glasses with a copper content of 0.4 mol% have been investigated by Cu K-edge extended X-ray absorption fine structure (EXAFS) and X-ray absorption near edge structure (XANES). Complementary data for Cu(II) was derived using UV–Vis-NIR spectroscopy. Indication for mainly linear two-fold coordination of the Cu+ ion was found by both EXAFS and XANES, but other coordination between Cu+ and O2– cannot be excluded. The Cu(I)-O bond lengths were found to be 1.79–1.83 ± 0.02 Å. EXAFS results showed that Cu(II) was mostly present in a Jahn-Teller distorted environment with oxygen, an octahedron with four shorter Cu(II)-O bonds and two longer in axial position. The equatorial bond lengths were found to be 1.89–1.91 ± 0.02 Å and the axial 2.20–2.24 ± 0.02 Å with no effect of the Jahn-Teller distortion of the octahedron when the glass composition was altered.

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  • 3.
    Karlsson, Stefan
    et al.
    RISE Research Institutes of Sweden, Bioekonomi och hälsa, Material- och ytdesign.
    Eklund, Per
    Linköping University, Sweden.
    Österlund, Lars
    Uppsala University, Sweden.
    Birch, Jens
    Linköping University, Sweden.
    Ali, Sharafat
    Linnæus University, Sweden.
    Effects of deposition temperature on the mechanical and structural properties of amorphous Al-Si-O thin films prepared by radio frequency magnetron sputtering2023Ingår i: Thin Solid Films, ISSN 0040-6090, E-ISSN 1879-2731, Vol. 787, artikel-id 140135Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Aluminosilicate (Al–Si–O) thin films containing up to 31 at.% Al and 23 at.% Si were prepared by reactive RF magnetron co-sputtering. Mechanical and structural properties were measured by indentation and specular reflectance infrared spectroscopy at varying Si sputtering target power and substrate temperature in the range 100 to 500 °C. It was found that an increased substrate temperature and Al/Si ratio give denser structure and consequently higher hardness (7.4 to 9.5 GPa) and higher reduced elastic modulus (85 to 93 GPa) while at the same time lower crack resistance (2.6 to 0.9 N). The intensity of the infrared Si-O-Si/Al asymmetric stretching vibrations shows a linear dependence with respect to Al concentration. The Al–O–Al vibrational band (at 1050 cm−1) shifts towards higher wavenumbers with increasing Al concentration which indicates a decrease of the bond length, evidencing denser structure and higher residual stress, which is supported by the increased hardness. The same Al–O–Al vibrational band (at 1050 cm−1) shifts towards lower wavenumber with increasing substrate temperature indicating an increase in the average coordination number of Al.

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  • 4.
    Karlsson, Stefan
    et al.
    RISE Research Institutes of Sweden, Bioekonomi och hälsa, Material- och ytdesign.
    Järn, Mikael
    RISE Research Institutes of Sweden, Bioekonomi och hälsa, Material- och ytdesign.
    Zäll, Erik
    Umeå University, Sweden.
    Antireflektiv beläggning i världsklass ger effektivare solfångare2023Ingår i: GLAS, nr 4, s. 36-37Artikel i tidskrift (Övrig (populärvetenskap, debatt, mm))
    Abstract [sv]

    I ett nyligen avslutat forskningsprojekt har Absolicon Solar Collector tillsammans med RISE Research Institutes of Sweden och Umeå universitet utvecklat en ny toppmodern antireflektiv beläggning som kan göra Absolicons solfångare än mer effektiva. Nu siktar man på ett nytt projekt för att skala upp metoden.

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  • 5.
    Linder, Clara
    Linköping University, Sweden.
    Catalytically active and corrosion resistant cobalt-based thin films2022Licentiatavhandling, monografi (Övrigt vetenskapligt)
    Abstract [en]

    Oxygen reduction reaction (ORR) has considerable potential for the pro-duction of electricity, issues with water splitting and many other applications in the energy sector. But in order to increase the efficiency of the reaction an electrocatalyst needs to be introduced. In today’s industrial devices precious and costly metals such as platinum (Pt) are used as catalysts. Other more abundant and cheaper alternatives, for example cobalt oxides, are therefore being investigated. In this thesis, pure cobalt (Co) thin films were synthesised to investigate if thin films can be used for the catalysis of ORR. This was successfully carried out by electrochemically modifying the thin films and grow catalytically ac-tive hexagonal cobalt oxide nanoparticles.   Multicomponent system CoCrFeNi is an emerging alloy system with high research interest for its high corrosion resistance suitable for harsh environments in which the applications for ORR are found. In this thesis, CoCrFexNi were synthesised as thin films. The corrosion resistance of the films was investigated in addition to their catalytic activity. The effect of Fe content on these properties was also studied. The presence of Fe was crucial for the electrochemical activation of films and catalytic activity towards ORR.  In summary, this thesis shows that cobalt based thin films can be used as catalysts combined with corrosion resistance for ORR applications.

  • 6. Raheel, A.
    et al.
    Imtiaz-ud-Din,
    Taj, M. B.
    Ayub, Rabia
    Stockholm University, Sweden.
    Tahir, M. N.
    Raftery, J.
    Al-Shakban, M.
    Synthesis, Characterization and DFT Study of Bioactive 2-[(2-Methylpropanoyl)amino]propanoic Acid and Its Polymeric Tributyltin(IV) Derivative2019Ingår i: ChemistrySelect, ISSN 2365-6549, Vol. 4, nr 29, s. 8638-8644Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Tributyltin(IV) derivative (1) was synthesized by reacting the ligand (A1) {2-[(2-methylpropanoyl)amino]propanoic acid} with tributyltin(IV)chloride in presence of potassium hydroxide. The compounds were characterized by elemental analysis, FTIR and multinuclear (1H, 13C and 119Sn) NMR spectroscopy. The 119Sn NMR data for (1) suggest that tin is five coordinated having trigonal bipyramidal molecular geometry. Molecular structures for (1) and (A1) were determined by single crystal X-ray analysis. Some new and novel structural features of the compounds, are reported first time. Tributyltin(IV) complex has distorted trigonal bipyramidal molecular geometry around tin in the solid state exhibiting single chain tetramer which may be ascribed as tetra-nuclear cage structure that is constructed from four tributyltin units and four ligand moieties. The tributyltin(IV) entities are bridged by one oxygen of the carboxylic group of one ligand and another oxygen of the amidic carbonyl of next ligand. The nature of Sn…O bond was analyzed with the help of natural bond orbital (NBO) analysis. The compounds were also screened in vitro for their anti-microbial and urease inhibition activities, and found some encouraging results. 

  • 7.
    Saha, Sayan
    et al.
    School of Chemical Science Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road Kolkata 700032 West Bengal India.
    Pal, Baisakhi
    Department of Physics Jadavpur University Jadavpur Kolkata 700 032 India.
    Sundar Das, Krishna
    School of Chemical Science Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road Kolkata 700032 West Bengal India.
    Kumar Ghose, Pradeepta
    School of Physical Science Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road Kolkata 700032 West Bengal India.
    Ghosh, Avik
    School of Mathematical & Computational Sciences Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road Kolkata 700032 West Bengal India.
    De, Avik
    School of Chemical Science Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road Kolkata 700032 West Bengal India.
    Kumar Das, Abhijit
    School of Mathematical & Computational Sciences Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road Kolkata 700032 West Bengal India.
    Pratim Ray, Partha
    Department of Physics Jadavpur University Jadavpur Kolkata 700 032 India.
    Mondal, Raju
    School of Chemical Science Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road Kolkata 700032 West Bengal India.
    Design of Dual Purpose Fe‐metallogel for Magnetic Refrigeration and Fabrication of Schottky Barrier Diode2022Ingår i: ChemistrySelect, ISSN 2365-6549, Vol. 7, nr 41Artikel i tidskrift (Refereegranskat)
  • 8.
    Temple, Alastair
    et al.
    RISE Research Institutes of Sweden, Säkerhet och transport, Brand och Säkerhet.
    Sokoti, Hasan
    RISE Research Institutes of Sweden, Säkerhet och transport, Brand och Säkerhet.
    Sundberg, Peter
    RISE Research Institutes of Sweden, Material och produktion, Kemi och Tillämpad mekanik.
    Kahl, Fredrik
    RISE Research Institutes of Sweden, Säkerhet och transport, Brand och Säkerhet.
    Anderson, Johan
    RISE Research Institutes of Sweden, Säkerhet och transport, Brand och Säkerhet. RISE.
    Vermina Plathmer, Frida
    RISE Research Institutes of Sweden, Säkerhet och transport, Brand och Säkerhet.
    Sjöström, Johan
    RISE Research Institutes of Sweden, Säkerhet och transport, Brand och Säkerhet.
    Development of Experimental Method for Assessing Risk of Lithium Fires Related with Fusion Reactor Lithium Cooling Loops2021Rapport (Övrigt vetenskapligt)
    Abstract [en]

    The aim of this project is to provide the basis for risk assessments relating to the risk of lithium leaks in the DONES project. This report firstly summarizes the current knowledge of risks and reaction features at different scales with liquid lithium. Note that the review is limited to fire behaviour of lithium in its liquid state and does not consider additional risks connected with breeding tritium or corrosive effects of impurities. Some of the questions important for this project are to limit the lithium reaction with water, limit the spread of fire started by a reaction with lithium and extinguish flame of lithium induced fires. The second part of the report consists discussion of some initial small-scale experiments, undertaken to provide a basis for limiting the extent for further larger tests, and a proposal for an experimental device where lithium reactions can be studied in a controlled environment, i.e. with controlled amount of oxygen, nitrogen or humidity in the experiment. This will then be the basis for risk assessment for liquid lithium loop in the DONES facility.

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  • 9.
    Tot, Aleksandar
    et al.
    KTH Royal Institute of Technology, Sweden.
    Zhang, Leiting
    Uppsala University, Sweden.
    Svensson, Per H.
    RISE Research Institutes of Sweden, Bioekonomi och hälsa, Kemiska processer och läkemedel.
    Kloo, Lars
    KTH Royal Institute of Technology, Sweden.
    Tuning of Molecular Water Organization in Water-in-Salt Electrolytes by Addition of Chaotropic Ionic Liquids2023Ingår i: The Journal of Physical Chemistry C, ISSN 1932-7447, E-ISSN 1932-7455, Vol. 127, nr 50, s. 24065-24076Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Water-in-salt electrolytes (WISEs) have expanded the useful electrochemical stability of water, making the development of functional aqueous lithium-ion batteries more accessible. The implementation of additives in the formulation of WISEs can further improve the electrochemical stability of water and avoid potential lithium-ion salt solubility issues. Here, we have used Gemini-type ionic liquids to suppress water activity by designing the structure of ionic-liquid cations. The different water-organizing effects of ionic-liquid cations have been investigated and correlated to battery performance in LTO/LMO full cells. The champion device, containing the most chaotropic ionic liquid, retained at least 99% of its Coulombic efficiency after 500 charging cycles, associated with a final specific discharge capacity of 85 mA h·g-1. These results indicated that water-rich Li+ solvation shells significantly contribute to the excellent device performance and long-term stability of the LTO/LMO-based full battery cells. This work shows that the fine-tuning of the Li+ solvation shell and water structure by the addition of chaotropic cations represents a promising strategy for generating more stable and effective lithium-ion-containing rechargeable aqueous batteries. 

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  • 10. Zahoor, A.
    et al.
    Imtiaz-Ud-Din,
    Andleeb, S.
    Raheel, A.
    Ayub, Rabia
    Uppsala University, Sweden.
    Abbas, S.
    Tahir, M. N.
    Zn(II) carboxylates containing heterocyclic secondary ligands: synthesis and structure manifestation through DFT studies2021Ingår i: Journal of coordination chemistry (Print), ISSN 0095-8972, E-ISSN 1029-0389, Vol. 74, nr 12, s. 1978-1991Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    New Zn(II) complexes (1–8) of general formula [Zn(R)2(L')2], where R = cinnamic acid (1–7), L' = 3-pyridine carboxamide (1), 2,2'-bipyridine (2), 3-pyridinecarbonitrile (3), 2-amino-5-(4-pyridinyl)-1,3,4-thiadiazole (4), 2-methylimidazole (5), 2-phenylimidazole (6), 2-imidazolidinethione (7) and for (8), R = acetic acid; L' = 2-amino-5-(4-pyridinyl)-1,3,4-thiadiazole)2, have been synthesized by a stoichiometric reaction between Zn(II) carboxylate(s) and the respective nitrogen-based ligands. The prepared compounds are analyzed by FTIR, NMR spectroscopy and single crystal X-ray diffraction techniques for their structural manifestations along with elemental analyses. The crystallographic data for 6 and 8 exhibit four-coordinated zinc having distorted tetrahedral molecular geometry. The thermogravimetric data demonstrate high stability of the compounds with gradual loss of acetate and thiadiazol fragments that ultimately lead to zinc oxide as the residual mass of 8. Quantum chemical calculations indicate that 7 is the softest in reactivity having the lowest band gap as determined from the energies of frontier molecular orbitals whereas 8 is highly polar with the highest dipole moment value of 12.61 D. The computational data are a complement to the success of the research.

  • 11.
    Zäll, Erik
    et al.
    Absolicon Solar Collector. Sweden; Umeå University, Sweden.
    Järn, Mikael
    RISE Research Institutes of Sweden, Bioekonomi och hälsa, Material- och ytdesign.
    Karlsson, Stefan
    RISE Research Institutes of Sweden, Bioekonomi och hälsa, Material- och ytdesign.
    Tryggeson, Henrik
    RISE Research Institutes of Sweden, Samhällsbyggnad, Bygg och fastighet.
    Tuominen, Mikko
    RISE Research Institutes of Sweden, Bioekonomi och hälsa, Material- och ytdesign.
    Sundin, Mikael
    RISE Research Institutes of Sweden, Bioekonomi och hälsa, Material- och ytdesign.
    Wågberg, Thomas
    Umeå University, Sweden.
    Aerosol-based deposition of broadband antireflective silica coating withclosed mesoporous structure2023Ingår i: Solar Energy Materials and Solar Cells, ISSN 0927-0248, E-ISSN 1879-3398, Vol. 250, s. 112078-, artikel-id 112078Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Solar energy will be a crucial part of the sustainable, fossil free energy production of the future. Amajority of this will be produced by solar collectors and photovoltaics. Important for the efficientutilization of the incident solar energy for both technologies are a cover glass with antireflectivecoatings giving it a high solar transmittance. In the current paper we describe the development ofantireflective mesoporous silica coatings on low-iron float glass using the aerosol-based nFOGTMdeposition technique. The coatings exhibit a hexagonal and closed pore structure, a high smoothness,and consistent thicknesses of approximately 110 nm. This is in line with optimal thicknessesdetermined from simulations of the antireflective behavior. Low-iron float glass coated on both sidesshow a highly reproducible solar weighted transmittance of 95 % in the wavelength range 300-2500nm and an antireflective effect increasing with incident angle. The smoothness and closed poresassociated with high cleanability, as well as high transmittance makes it a competitive broadbandantireflective coating well adapted for solar glass applications.

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  • 12.
    Zäll, Erik
    et al.
    Absolicon Solar Collector AB, Sweden; Umeå University, Sweden.
    Karlsson, Stefan
    RISE Research Institutes of Sweden, Bioekonomi och hälsa, Material- och ytdesign.
    Järn, Mikael
    RISE Research Institutes of Sweden, Bioekonomi och hälsa, Material- och ytdesign.
    Segervald, Jonas
    Umeå University, Sweden.
    Lundberg, Petter
    Umeå University, Sweden.
    Wågberg, Thomas
    Umeå University, Sweden; SLU Swedish University of Agricultural Sciences, Sweden.
    Durability of antireflective SiO2 coatings with closed pore structure2023Ingår i: Solar Energy Materials and Solar Cells, ISSN 0927-0248, E-ISSN 1879-3398, Vol. 261, artikel-id 112521Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The use of antireflective coatings to increase the transmittance of the cover glass is a central aspect of achieving high efficiencies for solar collectors and photovoltaics alike. Considering an expected lifetime of 20–30 years for solar energy installations, the durability of the antireflective surfaces is essential. Here, a novel antireflective SiO2 coating with a hexagonally ordered closed pore structure, produced with an aerosol-based sol-gel method is benchmarked against two commercial coatings; produced with acid etching and sol-gel roll coating. The optical and mechanical properties together with contact angle characteristics were evaluated before and after various durability tests, including climate chamber tests, outdoor exposure, and abrasion. Compared to the commercial antireflective coatings with open pore structures, the novel coating performed in parity, or better, in all tests. Based on the results of humidity freeze and industrial climate chamber tests, it appears that the coating with closed pore structure has a better ability to prevent water adsorption. Additionally, the closed pore structure of the coating seems to minimize the accumulation of dirt and deposits. The abrasion and cleanability test further confirm the advantages of a closed pore structure, showcasing the coating's mechanical durability. While the coatings exhibit similar hardness and reduced elastic modulus, the closed pore coating proves to be even harder after undergoing the industrial climate chamber test, but also slightly more brittle, as indicated by the probability of crack initiation. In summary the closed pore structure is well suited for tempered and arid climates, making it a truly competitive alternative to existing antireflective coatings.

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