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Multi-layer thin film electrolytes for application in High Temperature Ceramic Electrochemical Devices

Costa, Rémi and Han, Feng and Semerad, Robert and Chesnaud, A. and Sennour, Mohamed and Thorel, A. (2018) Multi-layer thin film electrolytes for application in High Temperature Ceramic Electrochemical Devices. In: European SOFC & SOE Forum 2018. 13th European SOFC & SOE Forum 2018, 4.-6. Juli 2018, Luzern, die Schweiz.

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Abstract

Reducing thickness of the electrolyte is a key route to reduce ohmic losses in high temperature electrochemical devices and unlock operation at lower temperature. However the production of such a film through conventional ceramic process often requires a sintering step at high temperature – typically above 1200°C – not necessarily compatible with the shrinking behavior and the chemical properties of the supporting materials. This particularly holds true for metal supported cells when pre-manufactured substrates are used. Here we report about a multi-layer electrolyte architecture and its low temperature manufacturing route specifically design for metal supported cells. This consists in interlayers of porous yttria stabilized zirconia (YSZ) directly coated onto the functional electrode and fired at mild temperature – typically below 900°C – followed by a gas tight YSZ and Gadolinium doped Ceria (GDC) double layer deposited by electron beam physical vapor Deposition (EB-PVD). The architecture was implemented into metal supported cells with a size up to 90 mm x 100 mm. Cells were tested in Fuel Cell or Electrolysis operation for more than 1500 hours and 2000 hours respectively. The evolution of the interfaces was monitored by Electrochemical Impedance Spectroscopy, and the microstructure of the thin films was investigated by Scanning Electron Microscopy and Transmission Electron Microscopy. Most Actual status of development will be given and prospects and challenges will be discussed.

Item URL in elib:https://elib.dlr.de/122629/
Document Type:Conference or Workshop Item (Poster)
Title:Multi-layer thin film electrolytes for application in High Temperature Ceramic Electrochemical Devices
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Costa, Rémiremi.costa (at) dlr.dehttps://orcid.org/0000-0002-3534-1935
Han, FengFeng.Han (at) dlr.dehttps://orcid.org/0000-0003-1904-134X
Semerad, RobertCeracoUNSPECIFIED
Chesnaud, A.ArminesUNSPECIFIED
Sennour, MohamedArminesUNSPECIFIED
Thorel, A.UNSPECIFIEDUNSPECIFIED
Date:July 2018
Journal or Publication Title:European SOFC & SOE Forum 2018
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:thi films, PVD, multi-layer, nano porous, coating
Event Title:13th European SOFC & SOE Forum 2018
Event Location:Luzern, die Schweiz
Event Type:international Conference
Event Dates:4.-6. Juli 2018
HGF - Research field:Energy
HGF - Program:Storage and Cross-linked Infrastructures
HGF - Program Themes:Fuel cells
DLR - Research area:Energy
DLR - Program:E SP - Energy Storage
DLR - Research theme (Project):E - Electrochemical Processes (Fuel Cells)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Costa, Dr Rémi
Deposited On:19 Nov 2018 15:43
Last Modified:19 Nov 2018 15:43

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