A fundamental study on carbon composites of FeF3·0.33H2O as open-framework cathode materials for calcium-ion batteries

Carbon composites of open-framework iron fluoride (FeF3·0.33H2O/C) was investigated as a new cathode material for calcium ion batteries for the first time. FeF3·0.33H2O/C delivers a relatively large capacity of ca. 110mAhg-1. Its reversible capacity was greatly improved over non-composite FeF3·0.33H...

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Bibliographic Details
Main Authors: Murata, Yoshiaki, Minami, Ryoji, Takada, Shoki, Aoyanagi, Kengo, Tojo, Tomohiro, Inada, Ryoji, Sakurai, Yoji
Format: Conference Proceeding
Language:English
Subjects:
Batteries
Calcium ions
Cathodes
Composite materials
Discharge
Electrode materials
Energy dispersive X ray spectroscopy
Iron
Metal fluorides
Spectroscopic analysis
Spectrum analysis
X ray photoelectron spectroscopy
X ray spectra
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Summary:Carbon composites of open-framework iron fluoride (FeF3·0.33H2O/C) was investigated as a new cathode material for calcium ion batteries for the first time. FeF3·0.33H2O/C delivers a relatively large capacity of ca. 110mAhg-1. Its reversible capacity was greatly improved over non-composite FeF3·0.33H2O. During the first discharge and discharge-charge, insertion/extraction of Ca2+ into/from FeF3·0.33H2O/C were confirmed by an ex-situ X-ray photoelectron spectroscopy (XPS) and energy dispersive X-ray spectroscopy (EDX) analysis. From the ex-situ analysis results, it was confirmed that Ca2+ was inserted and extracted with redox of Fe.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4974787