Mechanism for Major Improvement in SOFC Electrolyte Conductivity When Using Lithium Compounds as Anode

He, Yang; Chen, Gang; Zhang, Xuebai; Zhang, Linlin; Yang, Di; Asghar, Muhammad Imran; Geng, Shujiang; Lund, Peter D.

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Mechanism for Major Improvement in SOFC Electrolyte Conductivity When Using Lithium Compounds as Anode

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Title:	Mechanism for Major Improvement in SOFC Electrolyte Conductivity When Using Lithium Compounds as Anode
Author(s):	He, Yang ; Chen, Gang ; Zhang, Xuebai ; Zhang, Linlin ; Yang, Di ; Asghar, Muhammad Imran ; Geng, Shujiang ; Lund, Peter D.
Date:	2020-05-26
Language:	en
Pages:	5 4134-4138
Department:	Northeastern University China New Energy Technologies Department of Applied Physics
Series:	ACS Applied Energy Materials, Volume 3, issue 5
ISSN:	2574-0962
DOI-number:	10.1021/acsaem.0c00364
Keywords:	anode, ionic conductivity, LiCO, LiOH, NiCoAlLiO, solid oxide fuel cell, space charge
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Citation: He , Y , Chen , G , Zhang , X , Zhang , L , Yang , D , Asghar , M I , Geng , S & Lund , P D 2020 , ' Mechanism for Major Improvement in SOFC Electrolyte Conductivity When Using Lithium Compounds as Anode ' , ACS Applied Energy Materials , vol. 3 , no. 5 , pp. 4134-4138 . https://doi.org/10.1021/acsaem.0c00364
Abstract: Recent studies indicate that the electrolyte ionic conductivity in an SOFC can be considerably increased by using lithium compounds as the electrode. We found that the ionic conductivity of Gd0.1Ce0.9O1.95 electrolyte in the Ni0.8Co0.15Al0.05LiO2 anode cell was 10.1 mS/cm only at 550 °C without H2, but it increased to 44.6 mS/cm after feeding H2 to the anode. It was found that LiOH/Li2CO3 moved into the GDC electrolyte from the NCAL anode and formed a three-phase composite electrolyte. A space charge region with a high oxygen vacancy concentration is formed around the interface of LiOH/Li2CO3 and GDC, which increases the ionic conductivity.

Permanent link to this item: http://urn.fi/URN:NBN:fi:aalto-2020123160442 Email this Export to RefWorks QR Code Print BibTex Tweet