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Mechanistic understanding of microstructure formation during synthesis of metal oxide/carbon nanocomposites

Elmanzalawy, Mennatalla 1; Innocenti, Alessandro ORCID iD icon 1; Zarrabeitia, Maider ORCID iD icon 1; Peter, Nicolas J.; Passerini, Stefano 1; Augustyn, Veronica; Fleischmann, Simon 1
1 Helmholtz-Institut Ulm (HIU), Karlsruher Institut für Technologie (KIT)

Abstract:

Nanocomposite materials consisting of metal oxide and carbon are of interest as electrode materials for both high rate intercalation-type and high capacity conversion-type charge storage processes. Facile synthesis processes like the pyrolysis of an organic carbon-source can yield a well-dispersed carbon phase within the metal oxide structure. Detailed understanding of the carbon formation process is required to tailor the resulting material microstructure. Herein, both the formation and the final microstructure of a molybdenum oxide/carbon nanocomposite are studied in detail. Octylamine assembled in the interlayer space of layered MoO3 serves as a carbon source. The structural changes during pyrolysis are characterized using a combination of in situ heating X-ray diffraction with simultaneous FTIR- and mass spectroscopy-coupled thermogravimetric analysis experiments. These reveal mobility and partial desorption of octylamine and interlayer water at low temperatures, octylamine decomposition and loss of long-range order at intermediate temperatures, and carbothermic reduction of molybdenum oxide at high temperatures during pyrolysis. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000160149
Veröffentlicht am 04.07.2023
Originalveröffentlichung
DOI: 10.1039/d3ta01230a
Scopus
Zitationen: 2
Web of Science
Zitationen: 2
Dimensions
Zitationen: 2
Cover der Publikation
Zugehörige Institution(en) am KIT Helmholtz-Institut Ulm (HIU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2023
Sprache Englisch
Identifikator ISSN: 2050-7488, 2050-7496
KITopen-ID: 1000160149
HGF-Programm 38.02.01 (POF IV, LK 01) Fundamentals and Materials
Erschienen in Journal of Materials Chemistry A
Verlag Royal Society of Chemistry (RSC)
Band 11
Heft 32
Seiten 17125-17137
Vorab online veröffentlicht am 13.06.2023
Nachgewiesen in Dimensions
Web of Science
Scopus
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