DataVXACS Applied Energy MaterialsPaper
journal article·2020-05-26Open access

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

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

ACS Applied Energy Materials· Volume 3· Issue 5
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Source abstract

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.
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Research context

Energy storageComposites

OpenAlex topics: Advancements in Solid Oxide Fuel Cells · Electronic and Structural Properties of Oxides · Fuel Cells and Related Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Metallurgy, Northeastern University, Shenyang 110819, China

Liaoning Key Laboratory for Metallurgical Sensor and Technology, Northeastern University, Shenyang 110819, China

Faculty of Physics and Electronic Science, Hubei University, Wuhan, Hubei 430062, China

New Energy Technologies Group, Department of Applied Physics, Aalto University School of Science, P.O. Box 15100, FI-00076 Aalto, Espoo, Finland

Funding

Suomen Akatemia · National Natural Science Foundation of China · Hubei Province

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