Reitz, Christian ; Suchomski, Christian ; Wang, Di ; Hahn, Horst ; Brezesinski, Torsten (2016)
In situ tuning of magnetization via topotactic lithium insertion in ordered mesoporous lithium ferrite thin films.
In: J. Mater. Chem. C, 4 (38)
doi: 10.1039/c6tc02731h
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The synthesis and characterization of cubic mesostructured lithium ferrite (alpha-LiFe5O8) with 20 nm diameter pores and nanocrystalline walls is reported. The material is prepared in the form of thin films by sol-gel dip-coating using a poly(isobutylene)-block-poly(ethylene oxide) amphiphilic diblock copolymer as the porogen. Electron microscopy, X-ray scattering and diffraction, time-of-flight secondary ion mass spectrometry, Raman and X-ray photoelectron spectroscopy all show that alpha-LiFe5O8 can be templated to produce high-quality films that are chemically and phase-pure and thermally stable to over 600 degrees C. Magnetometry measurements indicate ferrimagnetic behavior below 300 K, with the coercivity exhibiting a T-1/2 dependence. This novel mesoporous spinel material - when used as an electrode in secondary battery cells - can reversibly store charge via topotactic Li insertion, which allows for the intriguing possibility of tuning the magnetization at room temperature in a facile and controlled manner. The general approach is simple and should be applicable to a variety of other magnetic materials that are capable of reacting electrochemically with Li to produce reduced phases.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2016 |
| Autor(en): | Reitz, Christian ; Suchomski, Christian ; Wang, Di ; Hahn, Horst ; Brezesinski, Torsten |
| Art des Eintrags: | Bibliographie |
| Titel: | In situ tuning of magnetization via topotactic lithium insertion in ordered mesoporous lithium ferrite thin films |
| Sprache: | Englisch |
| Publikationsjahr: | 2016 |
| Verlag: | Royal Society of Chemistry, England |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | J. Mater. Chem. C |
| Jahrgang/Volume einer Zeitschrift: | 4 |
| (Heft-)Nummer: | 38 |
| DOI: | 10.1039/c6tc02731h |
| Kurzbeschreibung (Abstract): | The synthesis and characterization of cubic mesostructured lithium ferrite (alpha-LiFe5O8) with 20 nm diameter pores and nanocrystalline walls is reported. The material is prepared in the form of thin films by sol-gel dip-coating using a poly(isobutylene)-block-poly(ethylene oxide) amphiphilic diblock copolymer as the porogen. Electron microscopy, X-ray scattering and diffraction, time-of-flight secondary ion mass spectrometry, Raman and X-ray photoelectron spectroscopy all show that alpha-LiFe5O8 can be templated to produce high-quality films that are chemically and phase-pure and thermally stable to over 600 degrees C. Magnetometry measurements indicate ferrimagnetic behavior below 300 K, with the coercivity exhibiting a T-1/2 dependence. This novel mesoporous spinel material - when used as an electrode in secondary battery cells - can reversibly store charge via topotactic Li insertion, which allows for the intriguing possibility of tuning the magnetization at room temperature in a facile and controlled manner. The general approach is simple and should be applicable to a variety of other magnetic materials that are capable of reacting electrochemically with Li to produce reduced phases. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Gemeinschaftslabor Nanomaterialien 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 26 Jul 2017 08:00 |
| Letzte Änderung: | 26 Jul 2017 08:00 |
| PPN: | |
| Sponsoren: | This work was partly carried out with the support of the Karlsruhe Nano Micro Facility (KNMF), a Helmholtz Research Infrastructure at Karlsruhe Institute of Technology (KIT)., Parts of this research were carried out at the light source PETRA III at DESY, a member of the Helmholtz Association (HGF)., Financial support by the German Academic Exchange Service (T. B.) and the German Research Foundation (H. H., grant no. DA 1781/1-1 and HA 1344/34-1) is gratefully acknowledged. |
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