Visualization of the reaction distribution in a composite cathode for an all-solid-state lithium-ion battery

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

doi:10.2109/jcersj2.16253

Feature: Functional Ceramics for Energy Conversion and Storage Devices: Full papers

Visualization of the reaction distribution in a composite cathode for an all-solid-state lithium-ion battery

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

Author information

Mahunnop FAKKAO
Graduate School of Engineering, Tohoku University
Kazuki CHIBA
Graduate School of Engineering, Tohoku University
Yuta KIMURA
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
Takashi NAKAMURA
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
Toyoki OKUMURA
Research Institute of Electrochemical Energy, National Institute of Advanced Industrial Science and Technology (AIST)
Kiyofumi NITTA
Japan Synchrotron Radiation Research Institute (JASRI)
Yasuko TERADA
Japan Synchrotron Radiation Research Institute (JASRI)
Yoshiharu UCHIMOTO
Graduate School of Human and Environmental Studies, Kyoto University
Koji AMEZAWA
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University

Keywords: All-solid-state lithium-ion battery, Reaction distribution, Two-dimensional X-ray absorption spectroscopy

JOURNAL FREE ACCESS

2017 Volume 125 Issue 4 Pages 299-302

DOI https://doi.org/10.2109/jcersj2.16253

Details

Abstract

In this work, we directly observed the reaction distribution formed in a composite cathode of the all-solid-state lithium-ion battery (ASSLIB) LiCoO₂/Li_2.2C_0.8B_0.2O₃|Li_2.2C_0.8B_0.2O₃|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.

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