Changes in Structure and Valence of Iron-Based Positive Electrodes in All-Solid-State Fluoride Batteries

All-solid-state fluoride batteries are candidates for postlithium-ion batteries with high energy density and safety. Among metal fluorides, FeF3, a fluorinated form of abundant iron, is one of the attractive candidate materials for a positive electrode due to its high capacity. To investigate the cause of the deterioration of the cycle characteristics of all-solid-state fluoride batteries using FeF3, it is necessary to have a detailed understanding of the significant volume change that occurs during charging and discharging and the incomplete Fe oxidation–reduction reaction. Reaction distribution is unavoidable in the electrode reactions of solid-state batteries. We therefore investigated the changes in valence and structure using a simultaneous small-angle X-ray scattering/X-ray diffraction/X-ray absorption near edge structures measurement system. Combining these results, we could obtain a model for the shape changes of Fe-related particles in the positive electrode.

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Publication Details

Journal
The Journal of Physical Chemistry C
Published
2025-06-21
DOI
https://doi.org/10.1021/acs.jpcc.5c01763
Citations
1
Primary Topic
Inorganic Fluorides and Related Compounds
Type
article
Field-Weighted Citation Impact
0.54

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article

Changes in Structure and Valence of Iron-Based Positive Electrodes in All-Solid-State Fluoride Batteries

So Fujinami, Koji Kimura, Tomotaka Nakatani, Masahiro Shikano et al.
1 citations
The Journal of Physical Chemistry C
Inorganic Fluorides and Related Compounds
0.54
article

Changes in Structure and Valence of Iron-Based Positive Electrodes in All-Solid-State Fluoride Batteries

So Fujinami, Koji Kimura, Tomotaka Nakatani, Masahiro Shikano, Keisuke Kibino, Kouichi Hayashi, Hikarí Sakaebe, Atsushi Inoishi, Kazuki Yoshii, Masahiko Yamamoto, Akira Yano, Yasuhiro Takabayashi
article en
1 citations

Abstract

All-solid-state fluoride batteries are candidates for postlithium-ion batteries with high energy density and safety. Among metal fluorides, FeF3, a fluorinated form of abundant iron, is one of the attractive candidate materials for a positive electrode due to its high capacity. To investigate the cause of the deterioration of the cycle characteristics of all-solid-state fluoride batteries using FeF3, it is necessary to have a detailed understanding of the significant volume change that occurs during charging and discharging and the incomplete Fe oxidation–reduction reaction. Reaction distribution is unavoidable in the electrode reactions of solid-state batteries. We therefore investigated the changes in valence and structure using a simultaneous small-angle X-ray scattering/X-ray diffraction/X-ray absorption near edge structures measurement system. Combining these results, we could obtain a model for the shape changes of Fe-related particles in the positive electrode.

The Journal of Physical Chemistry CVol. 129(26)
Kyushu University (JP), Nagoya Institute of Technology (JP), Kyoto University (JP), SPring-8 (JP), Japan Synchrotron Radiation Research Institute (JP), Advance (Japan) (JP), National Institute of Advanced Industrial Science and Technology (JP)
New Energy and Industrial Technology Development Organization
Openalex Percentile: Top 35%
Inorganic Fluorides and Related Compounds
0.54
DOISourceOpenAlex
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