Ambient pressure synthesis of La2LiHO3 as a solid electrolyte for a hydrogen electrochemical cell

The capability of La2LiHO3 as a H− conductive solid electrolyte has recently been demonstrated, which has suggested the possibility of developing electrochemical devices based on H− conduction. However, the performance of La2LiHO3 as a solid electrolyte has not yet been fully clarified. In this stud...

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Published in:Journal of the American Ceramic Society 2019-06, Vol.102 (6), p.3228-3235
Main Authors: Matsui, Naoki, Kobayashi, Genki, Suzuki, Kota, Watanabe, Akihiro, Kubota, Akiko, Iwasaki, Yuki, Yonemura, Masao, Hirayama, Masaaki, Kanno, Ryoji
Format: Article
Language:English
Subjects:
Crystal structure
Electric potential
Electrochemical cells
Electrolytes
Electromotive forces
Neutron flux
Pellets
Pressure
Sintering
Solid electrolytes
Structural stability
Thermal stability
X-ray diffraction
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container_issue 6
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container_title Journal of the American Ceramic Society
container_volume 102
creator Matsui, Naoki
Kobayashi, Genki
Suzuki, Kota
Watanabe, Akihiro
Kubota, Akiko
Iwasaki, Yuki
Yonemura, Masao
Hirayama, Masaaki
Kanno, Ryoji
description The capability of La2LiHO3 as a H− conductive solid electrolyte has recently been demonstrated, which has suggested the possibility of developing electrochemical devices based on H− conduction. However, the performance of La2LiHO3 as a solid electrolyte has not yet been fully clarified. In this study, we prepared La2LiHO3 sintered pellets by a conventional solid‐state reaction with LiH flux under ambient pressure and characterized the crystal structure and thermal stability (to moisture, ambient air, and oxygen) by neutron and X‐ray diffraction measurements. The produced sintered pellets exhibited an activation energy of 69.2 kJ/mol, which is consistent with the value of the sample synthesized by the high‐pressure method. The gas‐sealing properties of the sintered La2LiHO3 pellets as the H− conductive solid electrolyte were confirmed by measuring the electromotive force using a hydrogen concentration cell.
doi_str_mv 10.1111/jace.16214
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subjects Crystal structure
Electric potential
Electrochemical cells
Electrolytes
Electromotive forces
Neutron flux
Pellets
Pressure
Sintering
Solid electrolytes
Structural stability
Thermal stability
X-ray diffraction
title Ambient pressure synthesis of La2LiHO3 as a solid electrolyte for a hydrogen electrochemical cell
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