Journal
JOURNAL OF POWER SOURCES
Volume 445, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2019.227320
Keywords
Fluoride-ion batteries; Graphite; F-GIC; Structural analyses
Funding
- R&D Initiative for Scientific Innovation on New Generation Batteries 2 (RISING2) Project [P16001]
- Austrian Science Fund (FWF) [P16001] Funding Source: Austrian Science Fund (FWF)
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The structures of fluorine-graphite intercalation compounds (F-GICs, C2.8F and C3.5F) have been analyzed by high-resolution transmission electron microscopy (TEM). Cross-sectional TEM images of the F-GICs indicate that the interlayer distance increases by insertion of fluorine with randomly buckled carbon layers. Such a structure can form by alternation in the bond angle at a carbon atom covalently bonded with fluorine. Electron energy loss spectroscopy combined with TEM indicates that the pi-orbital network over the graphitic carbon layer reduces with fluorination. The C-F bond is essentially covalent.
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