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Double-Decker Design for High Performance Solid Oxide Cells

delete2026-04-09
delete0
PRE
AI
S
Sovann Khan
K
Kwati Leonard
H
Hyo‐Young Kim
W
Wilhelm Meulenberg
M
Motonori Watanabe
M
Miki Inada
H
Hiroshige Matsumoto
J
John A. Kilner
T
Tatsumi Ishihara
DOI：10.1039/D6TA00612Ddelete
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Abstract

Abstract

En 中文
The solid oxide cell is one of the key energy conversion devices for achieving a low-carbon society. A single solid-ion conductor such as oxide ion or proton conductor is generally used for the electrolyte sandwiched between positive and negative electrodes. However; because of the low oxide ion conductivity; a high operating temperature is required resulting in low stability and high operational cost. In contrast; a cell using a proton-conducting oxide can operate at intermediate or low temperatures; unfortunately; the Faradaic efficiency is low because of the partial electronic conductivity. Here; we propose a double decker design for a solid oxide cell by depositing oxide and proton conducting solid oxide films onto an intermediate porous electrode. A proton-conducting electrolyte; BaZr0.44Ce0.36Y0.1O3-δ film was deposited on a porous NiO-SrZr0.5Ce0.4Y0.1O3-δ substrate by the tape-casting and co-sintering method. Onto this half-cell; a porous interlayer electrode of several oxides was deposited; and the upper electrolyte film of La0.9Sr0.1Ga0.8Mg0.2O3-δ was further deposited by the pulsed laser deposition method. Finally; an air electrode was deposited to assemble a single cell with two electrolyte layers. By using oxide; proton and electron triple conductor for the interlayer electrode; the newly designed cell generated good performance for both fuel cell and steam electrolysis modes at low temperature. More importantly; this cell shows a high and stable Faradaic efficiency despite the BaZr0.44Ce0.36Y0.1O3-δ proton conductor cell; which makes it more promising for green H2 production from steam electrolysis.
Keywords:
Solid oxide cell
Proton-conducting electrolyte
Double-decker design
Faradaic efficiency
Low-temperature operation

Journal

J
j. mater. chem. a
IF:
0
Papers:
1.6K
Citations:
0

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