TY - JOUR
T1 - Understanding the reaction mechanism and performances of 3d transition metal cathodes for all-solid-state fluoride ion batteries
AU - Zhang, Datong
AU - Yamamoto, Kentaro
AU - Ochi, Aika
AU - Wang, Yanchang
AU - Yoshinari, Takahiro
AU - Nakanishi, Koji
AU - Nakano, Hiroyuki
AU - Miki, Hidenori
AU - Nakanishi, Shinji
AU - Iba, Hideki
AU - Uchiyama, Tomoki
AU - Watanabe, Toshiki
AU - Amezawa, Koji
AU - Uchimoto, Yoshiharu
N1 - Funding Information:
This work was supported by JST-Mirai Program Grant Number JPMJMI18E2, Japan. Synchrotron radiation experiments were performed at beamline BL37XU of SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) (Proposal number 2016B1021, 2016B1517, 2017A1456, 2017B1038, 2018B1029, 2018B1616, and 2019A1020). Acknowledgements are also due to China Scholarship Council (CSC No. 201806370208) and Kyoto University for their nancial supports to D. Zhang.
Publisher Copyright:
© The Royal Society of Chemistry.
PY - 2021/1/7
Y1 - 2021/1/7
N2 - Fluoride ion batteries (FIBs) are regarded as promising energy storage devices, and it is important and urgent to develop cathode materials with high energy densities for use in FIBs. However, systematic investigations of 3d transition metal/metal fluorides have been rarely reported thus far because of the restricted reversibility and unfavorable interfacial compatibility of 3d transition metal/metal fluorides with solid-state electrolytes. Herein, 3d transition metals are investigated by utilizing thin-film cells with LaF3 substrates. The highly reversible (de)fluorinations of Cu, Co, and Ni are validated at various temperatures. High capacity utilizations of 79.5%, 100%, and 90.5% are obtained during the initial cycle at 150 °C. By combining results from X-ray absorption spectroscopy (XAS) and electrochemical characterization, the electrochemical behaviors of Cu, Co, and Ni, as well as experimental evidence of the two-phase transition mechanism during the M/MF2 reaction are reported for the first time. This provides new insights required for future cathode designs for use in all-solid-state FIBs.
AB - Fluoride ion batteries (FIBs) are regarded as promising energy storage devices, and it is important and urgent to develop cathode materials with high energy densities for use in FIBs. However, systematic investigations of 3d transition metal/metal fluorides have been rarely reported thus far because of the restricted reversibility and unfavorable interfacial compatibility of 3d transition metal/metal fluorides with solid-state electrolytes. Herein, 3d transition metals are investigated by utilizing thin-film cells with LaF3 substrates. The highly reversible (de)fluorinations of Cu, Co, and Ni are validated at various temperatures. High capacity utilizations of 79.5%, 100%, and 90.5% are obtained during the initial cycle at 150 °C. By combining results from X-ray absorption spectroscopy (XAS) and electrochemical characterization, the electrochemical behaviors of Cu, Co, and Ni, as well as experimental evidence of the two-phase transition mechanism during the M/MF2 reaction are reported for the first time. This provides new insights required for future cathode designs for use in all-solid-state FIBs.
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U2 - 10.1039/d0ta08824b
DO - 10.1039/d0ta08824b
M3 - Article
AN - SCOPUS:85099171026
SN - 2050-7488
VL - 9
SP - 406
EP - 412
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
IS - 1
ER -
