Mechanism for Major Improvement in SOFC Electrolyte Conductivity When Using Lithium Compounds as Anode
| Autor: | Yang He, Peter Lund, Di Yang, Gang Chen, Shujiang Geng, Linlin Zhang, Muhammad Asghar, Xuebai Zhang |
|---|---|
| Přispěvatelé: | Northeastern University China, New Energy Technologies, Department of Applied Physics, Aalto-yliopisto, Aalto University |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
anode Energy Engineering and Power Technology chemistry.chemical_element LiOH 02 engineering and technology Electrolyte Conductivity 010402 general chemistry 01 natural sciences solid oxide fuel cell Materials Chemistry Electrochemistry Chemical Engineering (miscellaneous) Ionic conductivity Electrical and Electronic Engineering LiCO food and beverages 021001 nanoscience & nanotechnology Space charge NiCoAlLiO 0104 chemical sciences Anode chemistry Chemical engineering Electrode ionic conductivity Solid oxide fuel cell Lithium space charge 0210 nano-technology |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|