著者

Toshiaki INA Yuki ORIKASA Titus MASESE Takayuki NAKAO Atsushi MINESHIGE Koji AMEZAWA Hajime TANIDA Tomoya URUGA Yoshiharu UCHIMOTO

出版者

The Electrochemical Society of Japan

雑誌

Electrochemistry (ISSN:13443542)

巻号頁・発行日

vol.82, no.10, pp.875-879, 2014-10-05 (Released:2014-10-05)

参考文献数

41

被引用文献数

4

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The relationship between the local structure and oxide ionic conduction of Nd2NiO4+δ possessing the K2NiF4 structure was investigated. Various oxygen nonstoichiometry samples of Nd2NiO4+δ prepared with different annealing oxygen partial pressures were examined. The local structure related to oxide ionic conduction was determined by the Nd K-edge extended X-ray absorption fine structure. The oxide ionic conductivity and surface exchange coefficient were estimated using electronic conductivity relaxation methods. The activation energy for the oxide ionic conductivity was found to have a direct correlation to the surface exchange coefficient. The bottleneck size for oxide ion conduction was strongly correlated to the oxide ionic conduction of interstitial oxygen and the oxygen surface exchange rate.

著者

Kota MOTOHASHI Takanori SANADA Takashi NAKAMURA Yuta KIMURA Yoshiharu UCHIMOTO Koji AMEZAWA

出版者

The Electrochemical Society of Japan

雑誌

Electrochemistry (ISSN:13443542)

巻号頁・発行日

pp.22-00114, (Released:2022-10-27)

被引用文献数

1

著者

Yuta KIMURA Keita FUNAYAMA Mahunnop FAKKAO Takashi NAKAMURA Naoaki KUWATA Tatsuya KAWADA Junichi KAWAMURA Koji AMEZAWA

出版者

The Electrochemical Society of Japan

雑誌

Electrochemistry (ISSN:13443542)

巻号頁・発行日

pp.21-00033, (Released:2021-03-16)

被引用文献数

6

著者

Mahunnop FAKKAO Kazuki CHIBA Yuta KIMURA Takashi NAKAMURA Toyoki OKUMURA Kiyofumi NITTA Yasuko TERADA Yoshiharu UCHIMOTO Koji AMEZAWA

出版者

公益社団法人 日本セラミックス協会

雑誌

Journal of the Ceramic Society of Japan (ISSN:18820743)

巻号頁・発行日

vol.125, no.4, pp.299-302, 2017-04-01 (Released:2017-04-03)

参考文献数

9

被引用文献数

13

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In this work, we directly observed the reaction distribution formed in a composite cathode of the all-solid-state lithium-ion battery (ASSLIB) LiCoO2/Li2.2C0.8B0.2O3|Li2.2C0.8B0.2O3|PEO|Li during charging by using the two-dimensional X-ray absorption spectroscopy (2D-XAS) at Co K-edge. The two-dimensional mapping of the state of charge in a composite cathode indicated that the reaction distribution was formed during charging process in the in-plane direction due to the disconnection in electron pathway at cracks. It was experimentally confirmed that the 2D-XAS technique was a useful tool for evaluating the reaction distribution in a composite cathode of an ASSLIB and investigating the influence factors for the formation of the reaction distribution.