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Influence of particle size and fluorination ratio of CFₓ precursor compounds on the electrochemical performance of C-FeF₂ nanocomposites for reversible lithium storage

Breitung, B.; Reddy, M.A.; Chakravadhanula, V.S.K.; Engel, M.; Kübel, C.; Powell, A.K.; Hahn, H.; Fichtner, M.

Abstract:
Systematical studies of the electrochemical performance of CFx-derived carbon–FeF2 nanocomposites for reversible lithium storage are presented. The conversion cathode materials were synthesized by a simple one-pot synthesis, which enables a reactive intercalation of nanoscale Fe particles in a CFx matrix, and the reaction of these components to an electrically conductive C–FeF2 compound. The pretreatment and the structure of the utilized CFx precursors play a crucial role in the synthesis and influence the electrochemical behavior of the conversion cathode material. The particle size of the CFx precursor particles was varied by ball milling as well as by choosing different C/F ratios. The investigations led to optimized C–FeF2 conversion cathode materials that showed specific capacities of 436 mAh/g at 40 °C after 25 cycles. The composites were characterized by Raman spectroscopy, X-Ray diffraction measurements, electron energy loss spectroscopy and TEM measurements. The electrochemical performances of the materials were tested by galvanostatic measurements.

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Verlagsausgabe §
DOI: 10.5445/IR/110093415
Veröffentlicht am 17.04.2018
Originalveröffentlichung
DOI: 10.3762/bjnano.4.80
Scopus
Zitationen: 11
Web of Science
Zitationen: 10
Seitenaufrufe: 30
seit 27.06.2018
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Helmholtz-Institut Ulm (HIU)
Karlsruhe Nano Micro Facility (KNMF)
Publikationstyp Zeitschriftenaufsatz
Jahr 2013
Sprache Englisch
Identifikator ISSN: 2190-4286
urn:nbn:de:swb:90-AAA1100934158
KITopen-ID: 110093415
HGF-Programm 43.15.02 (POF II, LK 01)
Erschienen in Beilstein journal of nanotechnology
Band 4
Seiten 705-713
Nachgewiesen in Scopus
Web of Science
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