Manufacturing of γ-LiAlO2 matrix for molten carbonate fuel cell by high-energy milling
Robert Baron , Tomasz Wejrzanowski , Jarosław Milewski , Łukasz Szabłowski , Arkadiusz Szczęśniak , Fung Kuan-Zong
AbstractMolten carbonate fuel cells (MCFCs) are promising high temperature power generating devices. However, unlike solid oxide fuel cells (SOFCs) they utilize a liquid electrolyte which must be immobilized in a porous matrix. In this paper, a slurry composition for lithium aluminate (γ-LiAlO2) matrix was developed and green matrices were subsequently formed by the tape casting method. In order to achieve the desired structure of the matrix (pore size, porosity) γ-LiAlO2 powder was milled in a planetary ball mill for 18 h with a solvent, dispersant and defoamer. After this step, other ingredients were added, including a binder and plasticizer to obtain optimal rheology of the slurry. Cell tests confirmed optimal performance of the matrix compared to the third party reference γ-LiAlO2 matrices. Burned out matrix was characterized by scanning electron microscopy (SEM) and laser diffraction in order to determine the γ-LiAlO2 powder particle size and morphology. The results show that high-energy milling enabled a fine pore structure and high specific surface area of the matrix to be obtained in a relatively short time, compared to conventional fabrication routes. The matrix structure obtained within this study is suitable for high performance operation of MCFC.
|Journal series||International Journal of Hydrogen Energy, ISSN 0360-3199|
|Publication size in sheets||0.5|
|Keywords in English||Molten carbonate fuel cell Lithium aluminate Electrolyte matrix Planetary ball milling Tape casting|
|ASJC Classification||; ; ;|
|Score||= 35.0, 24-07-2020, ArticleFromJournal|
|Publication indicators||= 3; = 5; : 2018 = 1.128; : 2018 = 4.084 (2) - 2018=3.969 (5)|
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