Operando Electron Microscopy and Impedance Analysis of Solid Oxide Electrolysis and Fuel Cells

被引：10
作者：
Ma, Zhongtao [1 ]
Chatzichristodoulou, Christodoulos [1 ]
Chiabrera, Francesco M. [1 ,2 ]
Molhave, Kristian S. [3 ]
Simonsen, Soren B. [1 ]
机构：
[1] DTU Energy, DK-2800 Lyngby, Denmark
[2] Catalonia Inst Energy Res IREC, Barcelona 08930, Spain
[3] DTU Nanolab, DK-2800 Lyngby, Denmark
来源：
ACS ENERGY LETTERS | 2024年 / 9卷 / 05期
基金：
欧洲研究理事会; 欧盟地平线“2020”;
关键词：
YTTRIA-STABILIZED ZIRCONIA; TEMPERATURE; CONDUCTIVITY; DEGRADATION; YSZ;
D O I：
10.1021/acsenergylett.4c00671
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Operando transmission electron microscopy (TEM) integrated with electrochemical impedance spectroscopy (EIS) is applied to the analysis of a model solid oxide electrolysis/fuel cell (SOEC/SOFC). The cell features electrodes made of gadolinia-doped ceria (CGO) and an electrolyte of yttria-stabilized zirconia (YSZ). Fabricated through pulsed laser deposition (PLD) and subsequent FIB-SEM processing procedures, the model cells were mounted on MEMS chips for operando TEM. Testing was carried out in an environmental TEM (ETEM) under reactive gases (H2 and H2O) at elevated temperatures relevant for SOEC and SOFC operation and under applied electrical potential. The activation energies for the YSZ ionic transport and CGO surface reaction were found to be 0.9 and 0.5 eV, respectively, aligning with literature values. The work demonstrates the feasibility of conducting SOEC/SOFC full cell tests directly within the ETEM, including EIS analysis during cell operation, offering deep insight into the cell contributions: electrochemical reactions, transport, and degradation mechanisms.
引用
收藏
页码：2007 / 2012
页数：6
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