TY - JOUR
T1 - Changes in Structure and Valence of Iron-Based Positive Electrodes in All-Solid-State Fluoride Batteries
AU - Yamamoto, Miki
AU - Takabayashi, Yasuhiro
AU - Kibino, Keisuke
AU - Kimura, Koji
AU - Inoishi, Atsushi
AU - Yano, Akira
AU - Yoshii, Kazuki
AU - Sakaebe, Hikari
AU - Shikano, Masahiro
AU - Nakatani, Tomotaka
AU - Fujinami, So
AU - Hayashi, Koichi
N1 - Publisher Copyright:
© 2025 American Chemical Society.
PY - 2025/7/3
Y1 - 2025/7/3
N2 - 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.
AB - 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.
UR - https://www.scopus.com/pages/publications/105008981073
UR - https://www.scopus.com/pages/publications/105008981073#tab=citedBy
U2 - 10.1021/acs.jpcc.5c01763
DO - 10.1021/acs.jpcc.5c01763
M3 - Article
AN - SCOPUS:105008981073
SN - 1932-7447
VL - 129
SP - 11831
EP - 11837
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
IS - 26
ER -