Record number :
Title of article :
Fabrication and performance evaluation of electrolyte-combined α-LiAlO2 matrices for molten carbonate fuel cells
Author/Authors :
Choi، نويسنده , , Hyun-Jong and Lee، نويسنده , , Jong-Jin and Hyun، نويسنده , , Sang Hoon and Lim، نويسنده , , Hee-Chun، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2011
Pages :
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Abstract :
To improve the unit cell performance and stability, molten carbonate fuel cell (MCFC) matrices were fabricated using synthetic α-LiAlO2 powder and they showed mechanical and microstructural stability under thermal cycle tests. The pure α-LiAlO2 matrix demonstrated stability with high open-circuit voltage (OCV) and maximum power density during many thermal cycle tests (more than 15 repetitions). Furthermore, to minimize the change in stack height during stack start-up and to improve mechanical and microstructural stabilities of the matrix, the electrolyte-combined α-LiAlO2 matrix was optimized by controlling the mixing ratio of synthetic α-LiAlO2 and Li/K carbonate powders. The suitable electrolyte content was fixed at approximately 50 vol.% for the homogeneously filled pores of the pure α-LiAlO2 matrix. These matrices showed good microstructural stability during five thermal cycle tests in an air atmosphere at 923 K and with improved unit cell performance (0.127 W cm−2) under MCFC operating conditions. t cell and thermal cycling tests, the optimized matrices were stable through more than 20 repetitions.
Keywords :
Electrolyte-combined matrix , Thermal cycle stability , Molten carbonate fuel cell , Synthetic alpha-lithium aluminate
Journal title :
International Journal of Hydrogen Energy
Journal title :
International Journal of Hydrogen Energy
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