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Electrochemical synthesis of carbon-metal fluoride nanocomposites as cathode materials for lithium batteries

Helen, M.; Fichtner, Maximilian 1,2; Anji Reddy, M.
1 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)
2 Center for Electrochemical Energy Storage Ulm & Karlsruhe (CELEST), Karlsruher Institut für Technologie (KIT)


Herein we have demonstrated an electrochemical method for the synthesis of carbon-metal fluoride nanocomposites (CMFNCs). Electrochemical intercalation of transition metal ions into graphite fluoride (CF$_{x}$) resulted in the formation of CMFNCs. As a proof-of-concept, we have synthesized C-FeF$_{2}$ and C-NiF$_{2}$ nanocomposites by the electrochemical intercalation of Fe$^{2+}$ and Ni$^{2+}$ into CF$_{x}$ from corresponding non-aqueous electrolytes. The C-FeF$_{2}$ and C-NiF$_{2}$ nanocomposites synthesized by this method showed high reversible capacity and cycling stability compared to chemically synthesized analogs as cathode materials for lithium batteries. The reversible capacity of chemically synthesized C-FeF$_{2}$ is 181 mAh g$^{-1}$, whereas electrochemically synthesized material is 349 mAh g$^{-1}$ after 20 cycles. The better cycling performance of electrochemically synthesized C-FeF$_{2}$ was attributed to the homogeneous distribution of FeF$_{2}$ nanoparticles within the carbon matrix enabled by the electrochemical intercalation of Fe$^{2+}$. The electrochemical method described here is emission-free, cost-effective, occurs at room temperature, and extendable to the synthesis of several other CMFNCs. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000125421
Veröffentlicht am 29.10.2020
DOI: 10.1016/j.elecom.2020.106846
Zitationen: 13
Web of Science
Zitationen: 11
Zitationen: 15
Cover der Publikation
Zugehörige Institution(en) am KIT Helmholtz-Institut Ulm (HIU)
Institut für Nanotechnologie (INT)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 11.2020
Sprache Englisch
Identifikator ISSN: 1388-2481
KITopen-ID: 1000125421
HGF-Programm 37.01.01 (POF III, LK 01) Fundamentals and Materials
Erschienen in Electrochemistry communications
Verlag Elsevier
Band 120
Seiten Art. Nr.: 106846
Schlagwörter CFx, Metal fluorides, C-FeF2 and C-NiF2, Lithium batteries, Electrochemical synthesis
Nachgewiesen in Dimensions
Web of Science
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