KIT | KIT-Bibliothek | Impressum | Datenschutz

Microwave synthesis of high-quality and uniform 4 nm ZnFe₂O₄ nanocrystals for application in energy storage and nanomagnetics

Suchomski, Christian; Breitung, Ben ORCID iD icon 1,2; Witte, Ralf 1; Knapp, Michael ORCID iD icon 3; Bauer, Sondes 4; Baumbach, Tilo 4; Reitz, Christian 1; Brezesinski, Torsten ORCID iD icon 1,2
1 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)
2 Center for Electrochemical Energy Storage Ulm & Karlsruhe (CELEST), Karlsruher Institut für Technologie (KIT)
3 Karlsruher Institut für Technologie (KIT)
4 Institut für Photonenforschung und Synchrotronstrahlung (IPS), Karlsruher Institut für Technologie (KIT)

Abstract (englisch):

Magnetic nanocrystals with a narrow size distribution hold promise for many applications in different areas ranging from biomedicine to electronics and energy storage. Herein, the microwave-assisted sol–gel synthesis and thorough characterization of size-monodisperse zinc ferrite nanoparticles of spherical shape is reported. X-ray diffraction, 57Fe Mössbauer spectroscopy and X-ray photoelectron spectroscopy all show that the material is both chemically and phase-pure and adopts a partially inverted spinel structure with Fe3+ ions residing on tetrahedral and octahedral sites according to (Zn0.32Fe0.68)tet[Zn0.68Fe1.32]octO4±δ. Electron microscopy and direct-current magnetometry confirm the size uniformity of the nanocrystals, while frequency-dependent alternating-current magnetic susceptibility measurements indicate the presence of a superspin glass state with a freezing temperature of about 22 K. Furthermore, as demonstrated by galvanostatic charge–discharge tests and ex situ X-ray absorption near edge structure spectroscopy, the as-prepared zinc ferrite nanocrystals can be used as a high-capacity anode material for Li-ion batteries, showing little capacity fade – after activation – over hundreds of cycles. ... mehr

Volltext §
DOI: 10.5445/IR/1000060433
DOI: 10.3762/bjnano.7.126
Zitationen: 27
Web of Science
Zitationen: 25
Zitationen: 29
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Energiespeichersysteme (IAM-ESS)
Institut für Nanotechnologie (INT)
Institut für Photonenforschung und Synchrotronstrahlung (IPS)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2016
Sprache Englisch
Identifikator ISSN: 2190-4286
KITopen-ID: 1000060433
HGF-Programm 37.01.01 (POF III, LK 01) Fundamentals and Materials
Erschienen in Beilstein journal of nanotechnology
Verlag Beilstein-Institut
Band 7
Seiten 1350-1360
Schlagwörter 1-phenylethanol route, lithium-ion battery, nanomagnetism, nanoparticles, nonaqueous sol–gel synthesis, zinc ferrite
Nachgewiesen in Dimensions
Web of Science
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page