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Elucidating the Lit...
Elucidating the Lithiation Process in Fe3−δO4 Nanoparticles by Correlating Magnetic and Structural Properties
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- Ulusoy, Seda (författare)
- Uppsala universitet,Fasta tillståndets fysik
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- Feygenson, Mikhail (författare)
- Uppsala universitet,Fasta tillståndets fysik,European Spallation Source ERIC, SE-22100 Lund, Sweden;Jülich Centre for Neutron Science (JCNS-1) Forschungszentrum Jülich, D-52425 Jülich, Germany
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- Thersleff, Thomas, 1980- (författare)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK)
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- Uusimaki, Toni (författare)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK)
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- Valvo, Mario (författare)
- Uppsala universitet,Strukturkemi
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- Roca, Alejandro G. (författare)
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Bellaterra 08193, Barcelona, Spain
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- Nogués, Josep (författare)
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Bellaterra 08193, Barcelona, Spain;ICREA, Pg. Lluís Companys 23, Barcelona 08010, Spain
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- Svedlindh, Peter (författare)
- Uppsala universitet,Fasta tillståndets fysik
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- Salazar Alvarez, Germán (författare)
- Uppsala universitet,Fasta tillståndets fysik
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(creator_code:org_t)
- American Chemical Society (ACS), 2024
- 2024
- Engelska.
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Ingår i: ACS Applied Materials and Interfaces. - : American Chemical Society (ACS). - 1944-8244 .- 1944-8252. ; 16:12, s. 14799-14808
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Abstract
Ämnesord
Stäng
- Due to their high potential energy storage, magnetite (Fe3O4) nanoparticles have become appealing as anode materials in lithium-ion batteries. However, the details of the lithiation process are still not completely understood. Here, we investigate chemical lithiation in 70 nm cubic-shaped magnetite nanoparticles with varying degrees of lithiation, x = 0, 0.5, 1, and 1.5. The induced changes in the structural and magnetic properties were investigated using X-ray techniques along with electron microscopy and magnetic measurements. The results indicate that a structural transformation from spinel to rock salt phase occurs above a critical limit for the lithium concentration (xc), which is determined to be between 0.5< xc ≤ 1 for Fe3−δO4. Diffraction and magnetization measurements clearly show the formation of the antiferromagnetic LiFeO2 phase. Upon lithiation, magnetization measurements reveal an exchange bias in the hysteresis loops with an asymmetry, which can be attributed to the formation of mosaic-like LiFeO2 subdomains. The combined characterization techniques enabled us to unambiguously identify the phases and their distributions involved in the lithiation process. Correlating magnetic and structural properties opens the path to increasing the understanding of the processes involved in a variety of nonmagnetic applications of magnetic materials.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- iron oxide
- lithiation
- structural transformation
- diffraction
- magnetism
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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