Logo: to the web site of Uppsala University

uu.sePublications from Uppsala University
Change search
Link to record
Permanent link

Direct link
Alternative names
Publications (10 of 238) Show all publications
Colbin, L. O., Hall, C. A., Etman, A. S., Buckel, A., Nyholm, L. & Younesi, R. (2024). Anodic dissolution of aluminum in non-aqueous electrolyte solutions for sodium-ion batteries. Energy Advances, 3(1), 143-148
Open this publication in new window or tab >>Anodic dissolution of aluminum in non-aqueous electrolyte solutions for sodium-ion batteries
Show others...
2024 (English)In: Energy Advances, E-ISSN 2753-1457, Vol. 3, no 1, p. 143-148Article in journal (Refereed) Published
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.

Place, publisher, year, edition, pages
Royal Society of Chemistry, 2024
National Category
Materials Chemistry Inorganic Chemistry
Identifiers
urn:nbn:se:uu:diva-522460 (URN)10.1039/d3ya00233k (DOI)001109995200001 ()
Funder
Swedish Energy Agency, 50177-1Vinnova, 2022-01465Vinnova, 2019-00064EU, Horizon 2020, 958174EU, Horizon 2020, 963542
Available from: 2024-02-06 Created: 2024-02-06 Last updated: 2024-06-25Bibliographically approved
Iurchenkova, A. A., Tammela, P., Wang, Z., Strömme, M., Nyholm, L. & Lindh, J. (2024). CO2-laser carbonization of polypyrrole/nanocellulose free-standing film for energy storage applications. In: RSC (Ed.), RCS Poster Conference 2024: . Paper presented at RCS Poster Conference 2024. 5-6th March 2024 online.. don: Royal Society of Chemistry
Open this publication in new window or tab >>CO2-laser carbonization of polypyrrole/nanocellulose free-standing film for energy storage applications
Show others...
2024 (English)In: RCS Poster Conference 2024 / [ed] RSC, don: Royal Society of Chemistry, 2024Conference paper, Poster (with or without abstract) (Refereed)
Place, publisher, year, edition, pages
don: Royal Society of Chemistry, 2024
National Category
Nano Technology
Research subject
Engineering Science with specialization in Nanotechnology and Functional Materials; Engineering Science with specialization in Nanotechnology and Functional Materials
Identifiers
urn:nbn:se:uu:diva-524623 (URN)
Conference
RCS Poster Conference 2024. 5-6th March 2024 online.
Available from: 2024-03-08 Created: 2024-03-08 Last updated: 2024-03-08
Ma, L. A., Buckel, A., Hofmann, A., Nyholm, L. & Younesi, R. (2024). Fundamental Understanding and Quantification of Capacity Losses Involving the Negative Electrode in Sodium-Ion Batteries. Advanced Science, 11(6), Article ID 2306771.
Open this publication in new window or tab >>Fundamental Understanding and Quantification of Capacity Losses Involving the Negative Electrode in Sodium-Ion Batteries
Show others...
2024 (English)In: Advanced Science, E-ISSN 2198-3844, Vol. 11, no 6, article id 2306771Article in journal (Refereed) Published
Abstract [en]

Knowledge about capacity losses related to the solid electrolyte interphase (SEI) in sodium-ion batteries (SIBs) is still limited. One major challenge in SIBs is that the solubility of SEI species in liquid electrolytes is comparatively higher than the corresponding species formed in Li-ion batteries. This study sheds new light on the associated capacity losses due to initial SEI formation, SEI dissolution and subsequent SEI reformation, charge leakage via SEI and subsequent SEI growth, and diffusion-controlled sodium trapping in electrode particles. By using a variety of electrochemical cycling protocols, synchrotron-based X-ray photoelectron spectroscopy (XPS), gas chromatography coupled with mass spectrometry (GC-MS), and proton nuclear magnetic resonance (1H-NMR) spectroscopy, capacity losses due to changes in the SEI layer during different open circuit pause times are investigated in nine different electrolyte solutions. It is shown that the amount of capacity lost depends on the interplay between the electrolyte chemistry and the thickness and stability of the SEI layer. The highest capacity loss is measured in NaPF6 in ethylene carboante mixed with diethylene carbonate electrolyte (i.e., 5 µAh h−1/2pause or 2.78 mAh g·h−1/2pause) while the lowest value is found in NaTFSI in ethylene carbonate mixed with dimethoxyethance electrolyte (i.e., 1.3 µAh h−1/2pause or 0.72 mAh g·h−1/2pause).

Place, publisher, year, edition, pages
Wiley-VCH Verlagsgesellschaft, 2024
Keywords
ageing, electrolytes, sodium-ion batteries, solid electrolyte interphase
National Category
Inorganic Chemistry Materials Chemistry
Identifiers
urn:nbn:se:uu:diva-528170 (URN)10.1002/advs.202306771 (DOI)001117922100001 ()38059817 (PubMedID)
Funder
Swedish Energy AgencySwedish Research Council Formas, 2016-01257German Research Foundation (DFG)
Available from: 2024-05-22 Created: 2024-05-22 Last updated: 2024-05-22Bibliographically approved
Tammela, P., Iurchenkova, A. A., Wang, Z., Strömme, M., Nyholm, L. & Lindh, J. (2024). Laser irradiation of photothermal precursors – a novel approach to produce carbon materials for supercapacitors. ChemSusChem, 17(11), 1-11, Article ID e20230.
Open this publication in new window or tab >>Laser irradiation of photothermal precursors – a novel approach to produce carbon materials for supercapacitors
Show others...
2024 (English)In: ChemSusChem, ISSN 1864-5631, E-ISSN 1864-564X, Vol. 17, no 11, p. 1-11, article id e20230Article in journal (Refereed) Published
Abstract [en]

A wide array of carbon materials finds extensive utility across various industrial applications today. Nonetheless, the production processes for these materials continue to entail elevated temperatures, necessitate the use of inert atmospheres, and often involve the handling of aggressive and toxic chemicals. The prevalent method for large-scale carbon material production, namely the pyrolysis of waste biomass and polymers, typically unfolds within the temperature range of 500–700 °C under a nitrogen (N2) atmosphere. Unfortunately, this approach suffers from significant energy inefficiency due to substantial heat loss over extended processing durations. In this work, we propose an interesting alternative: the carbonization of photothermal nanocellulose/polypyrrole composite films through CO2 laser irradiation in the presence of air. This innovative technique offers a swift and energy-efficient means of preparing carbon materials. The unique interaction between nanocellulose and polypyrrole imparts the film with sufficient stability to retain its structural integrity post-carbonization. This breakthrough opens up new avenues for producing binder-free electrodes using a rapid and straightforward approach. Furthermore, the irradiated film demonstrates specific and areal capacitances of 159 F g−1 and 62 μF cm−2, respectively, when immersed in a 2 M NaOH electrolyte. These values significantly surpass those achieved by current commercial activated carbons. Together, these attributes render CO2-laser carbonization an environmentally sustainable and ecologically friendly method for carbon material production.

Place, publisher, year, edition, pages
John Wiley & Sons, 2024
National Category
Nano Technology
Research subject
Engineering Science with specialization in Nanotechnology and Functional Materials
Identifiers
urn:nbn:se:uu:diva-524624 (URN)10.1002/cssc.202301471 (DOI)001164389000001 ()2-s2.0-85185286990 (Scopus ID)
Funder
Swedish Energy Agency
Available from: 2024-03-08 Created: 2024-03-08 Last updated: 2025-02-10Bibliographically approved
Srinath, A., von Fieandt, K., Fritze, S., Nyholm, L., Lewin, E. & Lindblad, R. (2024). Near-surface analysis of magnetron sputtered AlCrNbYZrNx high entropy materials resolved by HAXPES. Applied Surface Science, 666, Article ID 160349.
Open this publication in new window or tab >>Near-surface analysis of magnetron sputtered AlCrNbYZrNx high entropy materials resolved by HAXPES
Show others...
2024 (English)In: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 666, article id 160349Article in journal (Refereed) Published
Abstract [en]

Hard X-ray photoelectron spectroscopy (HAXPES) was used to perform a non-destructive depth profile of AlCrNbYZrNx (x = 0 to ∼50 at.%) thin films. The outermost native oxide of the pristine thin films contained the highest coordination oxides of every metal. Substoichiometric oxides or oxynitrides were found underneath. After exposure to 1.0 M HCl, increases in the most highly coordinated oxides of Cr, Nb, and Al in films with up to 37 at.% N were observed, suggesting that the low coordination oxides and oxynitrides in the subsurface had been further oxidised and were intermediary compounds in the passivation process. Al and Y oxides were lost to the HCl electrolyte, in agreement with their respective Pourbaix diagrams. The film with 49 at.% N showed little to no change in the data due to its high porosity which led to the oxide being detected at all probed depths. The metal core level spectra revealed a preferential order in which nitrogen bonded with the different metals. Nitrogen interacted first with Y, then Zr, then Al and Nb, and lastly Cr as the nitrogen content was increased.

Place, publisher, year, edition, pages
Elsevier, 2024
Keywords
Multicomponent alloys, Passivation, Corrosion, Metal nitrides, Synchrotron radiation
National Category
Surface- and Corrosion Engineering Materials Chemistry Inorganic Chemistry
Identifiers
urn:nbn:se:uu:diva-466218 (URN)10.1016/j.apsusc.2024.160349 (DOI)001247335700001 ()
Funder
EU, Horizon 2020, 730872
Available from: 2022-01-25 Created: 2022-01-25 Last updated: 2025-02-09Bibliographically approved
Zhu, Y., Nyberg, T., Nyholm, L., Primetzhofer, D., Shi, X. & Zhang, Z. (2024). Wafer-Scale Ag2S-based Memristive Crossbar Arrays with Ultra-low Switching-energies Reaching Biological Synapses. Nano-Micro Letters, 17, Article ID 69.
Open this publication in new window or tab >>Wafer-Scale Ag2S-based Memristive Crossbar Arrays with Ultra-low Switching-energies Reaching Biological Synapses
Show others...
2024 (English)In: Nano-Micro Letters, ISSN 2150-5551, Vol. 17, article id 69Article in journal (Refereed) Published
Abstract [en]

Memristive crossbar arrays (MCAs) offer parallel data storage and processing for energy-efficient neuromorphic computing. However, most wafer-scale MCAs that are compatible with complementary metal–oxide–semiconductor (CMOS) technology still suffer from substantially larger energy consumption than biological synapses, due to the slow kinetics of forming conductive paths inside the memristive units. Here we report wafer-scale Ag2S-based MCAs realized using CMOS-compatible processes at temperatures below 160 oC. Ag2S electrolytes supply highly mobile Ag+ ions, and provide the Ag/Ag2S interface with low silver nucleation barrier to form silver filaments at low energy costs. By further enhancing Ag+ migration in Ag2S electrolytes via microstructure modulation, the integrated memristors exhibit a record low threshold of approximately -0.1 V, and demonstrate ultra-low switching-energies reaching femtojoule values as observed in biological synapses. The low-temperature process also enables MCA integration on polyimide substrates for applications in flexible electronics. Moreover, the intrinsic nonidealities of the memristive units for deep learning can be compensated by employing an advanced training algorithm. An impressive accuracy of 92.6 % in image recognition simulations is demonstrated with the MCAs after the compensation. The demonstrated MCAs provide a promising device option for neuromorphic computing with ultra-high energy-efficiency.  

Place, publisher, year, edition, pages
Springer Nature, 2024
Keywords
Wafer-scale Ag2S films, Reactive sputter, Silver nucleation, Ag+ migration, Energy- efficient neuromorphic computing
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:uu:diva-542285 (URN)10.1007/s40820-024-01559-2 (DOI)001361606100001 ()39572441 (PubMedID)2-s2.0-85209734599 (Scopus ID)
Funder
Swedish Foundation for Strategic Research, FFL15-0174Swedish Research Council, 2018-06030Swedish Research Council, 2019-04690Knut and Alice Wallenberg Foundation, 2020-0190Olle Engkvists stiftelse, 214-0322
Available from: 2024-11-10 Created: 2024-11-10 Last updated: 2025-01-14Bibliographically approved
Zendejas Medina, L., Mølmen, L., Paschalidou, E.-M., Donzel-Gargand, O., Leisner, P., Jansson, U. & Nyholm, L. (2023). Extending the Passive Region of CrFeNi-Based High Entropy Alloys. Advanced Functional Materials, 33(51), Article ID 2307897.
Open this publication in new window or tab >>Extending the Passive Region of CrFeNi-Based High Entropy Alloys
Show others...
2023 (English)In: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028, Vol. 33, no 51, article id 2307897Article in journal (Refereed) Published
Abstract [en]

This study provides principles for designing new corrosion resistant high entropy alloys. The theoretical framework is a percolation model developed by Newman and Sieradzki that predicts the ability of an alloy to passivate, i.e., to form a protective surface oxide, based on its composition. Here, their model is applied to more complex materials than previously, namely amorphous CrFeNiTa and CrFeNiW alloys. Furthermore, the model describes a more complex passivation process: reforming the oxide layer above the transpassive potential of Cr. The model is used to predict the lowest concentration of Ta or W required to extend the passive region, yielding 11–14 at% Ta and 14–17 at% W. For CrFeNiTa, experiments reveal a threshold value of 13–15 at% Ta, which agrees with the prediction. For CrFeNiW, the experimentally determined threshold value is 37–45 at% W, far above the predicted value. Further investigations explore why the percolation model fails to describe the CrFeNiW system; key factors are the higher nobility and the pH sensitivity of W. These results demonstrate some limitations of the percolation model and offer complementary passivation criteria, while providing a design route for combining the properties of the 3d transition metal and refractory metal groups.

Place, publisher, year, edition, pages
Wiley-VCH Verlagsgesellschaft, 2023
Keywords
corrosion, thin film, coating, high entropy alloy, percolation theory
National Category
Materials Chemistry
Identifiers
urn:nbn:se:uu:diva-489915 (URN)10.1002/adfm.202307897 (DOI)001062551700001 ()
Funder
Vinnova, 2016-05156Swedish Research Council, 2019-00207Swedish Foundation for Strategic Research, ARC19-0026Knowledge Foundation
Note

Title in the list of papers of León Zendejas Medina's thesis: Extending the passive region of CrFeNi-based high entropy alloys by including Ta or W

Available from: 2022-12-06 Created: 2022-12-06 Last updated: 2024-05-21Bibliographically approved
Huang, Y.-K., Chen, H. & Nyholm, L. (2023). Influence of Lithium Diffusion into Copper Current Collectors on Lithium Electrodeposition in Anode‐Free Lithium‐Metal Batteries. Small, 19(43), Article ID 2306829.
Open this publication in new window or tab >>Influence of Lithium Diffusion into Copper Current Collectors on Lithium Electrodeposition in Anode‐Free Lithium‐Metal Batteries
2023 (English)In: Small, ISSN 1613-6810, E-ISSN 1613-6829, Vol. 19, no 43, article id 2306829Article in journal (Refereed) Published
Abstract [en]

The development of “anode-free” lithium-metal batteries with high energy densities is, at present, mainly limited by the poor control of the nucleation of lithium directly on the copper current collector, especially in conventional carbonate electrolytes. It is therefore essential to improve the understanding of the lithium nucleation process and its interactions with the copper substrate. In this study, it is shown that diffusion of lithium into the copper substrate, most likely via the grain boundaries, can significantly influence the nucleation process. Such diffusion makes it more difficult to obtain a great number of homogeneously distributed lithium nuclei on the copper surface and thus leads to inhomogeneous electrodeposition. It is, however, demonstrated that the nucleation of lithium on copper is significantly improved if an initial chemical prelithiation of the copper surface is performed. This prelithiation saturates the copper surface with lithium and hence decreases the influence of lithium diffusion via the grain boundaries. In this way, the lithium nucleation can be made to take place more homogenously, especially when a short potentiostatic nucleation pulse that can generate a large number of nuclei on the surface of the copper substrate is applied.

Place, publisher, year, edition, pages
Wiley-VCH Verlagsgesellschaft, 2023
Keywords
anode‐free lithium‐metal batteries, copper, lithium diffusion, lithium electrodeposition, nucleation
National Category
Materials Chemistry
Identifiers
urn:nbn:se:uu:diva-516166 (URN)10.1002/smll.202306829 (DOI)001057824100001 ()
Funder
Swedish Research Council, VR‐2019‐04276
Available from: 2023-11-16 Created: 2023-11-16 Last updated: 2023-11-18Bibliographically approved
Iurchenkova, A. A., Tammela, P., Wang, Z., Strömme, M., Nyholm, L. & Lindh, J. (2023). Laser-induced carbonization of photothermal precursor as potential scalable approach to carbon material synthesis for energy storage applications. In: POLYSTORAGE winterschool 2023, Sestriere, Italy, 19th - 24th of March: . Paper presented at POLYSTORAGE winterschool 2023, Sestriere, Italy, 19th - 24th of March.
Open this publication in new window or tab >>Laser-induced carbonization of photothermal precursor as potential scalable approach to carbon material synthesis for energy storage applications
Show others...
2023 (English)In: POLYSTORAGE winterschool 2023, Sestriere, Italy, 19th - 24th of March, 2023Conference paper, Poster (with or without abstract) (Refereed)
National Category
Nano Technology
Research subject
Engineering Science with specialization in Nanotechnology and Functional Materials
Identifiers
urn:nbn:se:uu:diva-509813 (URN)
Conference
POLYSTORAGE winterschool 2023, Sestriere, Italy, 19th - 24th of March
Available from: 2023-08-23 Created: 2023-08-23 Last updated: 2023-08-23
Zendejas Medina, L., de Costa, M. V., Donzel-Gargand, O., Nyholm, L., Gamstedt, E. K. & Jansson, U. (2023). Magnetron sputtered high entropy alloy/amorphous carbon nanocomposite coatings. Materials Today Communications, 37, Article ID 107389.
Open this publication in new window or tab >>Magnetron sputtered high entropy alloy/amorphous carbon nanocomposite coatings
Show others...
2023 (English)In: Materials Today Communications, ISSN 2352-4928, Vol. 37, article id 107389Article in journal (Refereed) Published
Abstract [en]

Magnetron sputter deposition of metal/carbon nanocomposites has been explored for many metals and a few alloys. In this paper, the formation of nanocomposites based on complex high entropy alloys (HEAs) was explored, focusing on the effect of the average carbon affinity on the phase formation. Two HEA systems were compared: CoCrFeMnNi and Cr26Fe27Ni27Ta20. For each alloy, around 20-50 at% carbon was added through combinatorial co-sputtering. Thermodynamic calculations predicted decomposition of these materials into multiple alloy phases, metal carbides, and, at higher concentrations, free graphitic carbon. Free carbon was found in the coatings at carbon concentrations above 28 and 33 at% for the CoCrFeMnNi and Cr26Fe27Ni27Ta20 systems, respectively, which agreed with the theoretical predictions. However, the segregation of metallic ele-ments and the formation of crystalline carbides were suppressed by the rapid quenching during deposition. All coatings were, instead, amorphous and consisted of either a single metallic phase or a mixture of a metallic phase and sp2- and sp3-hybridized carbon. Mechanical and electrochemical tests were performed, including in-situ fragmentation tests to quantify the crack resistance. The presence of free carbon made the coatings softer than the corresponding single-phase materials. Under tensile strain, the nanocomposite coatings formed a larger number of narrower cracks and exhibited less delamination at high strains.

Place, publisher, year, edition, pages
Elsevier, 2023
Keywords
Magnetron sputtering, Nanocomposite, Amorphous carbon, Fragmentation test
National Category
Materials Chemistry Inorganic Chemistry
Identifiers
urn:nbn:se:uu:diva-518095 (URN)10.1016/j.mtcomm.2023.107389 (DOI)001104007800001 ()
Funder
Swedish Research Council, 2019-00207Vinnova, 2016-05156
Available from: 2024-01-03 Created: 2024-01-03 Last updated: 2024-01-03Bibliographically approved
Projects
Electrochemical Techniques for the Development of Miniaturised Batteries and Sensors [2008-03690_VR]; Uppsala UniversityElectrodeposition: a valuable tool in the manufacturing of materials for the next generation of Li-ion batteries [2011-03506_VR]; Uppsala UniversityElectrochemistry for safe and durable high-capacity lithium based batteries [2015-04421_VR]; Uppsala UniversitySolving two major electrochemical problems causing degradation of lithium-based batteries [2019-04276_VR]; Uppsala University
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-9292-016X

Search in DiVA

Show all publications