Cost-effective synthesis of a-LiAlO2 powders for molten carbonate fuel cell matrices

H. J. Choi, J. J. Lee, S. H. Hyun, H. C. Lim

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

Lithium aluminate (α-/β-LiAlO2) particles were fabricated using three methods. The first method used organic glycerin and triethylene glycol which functioned as a catalyst for fabrication of α-LiAlO2 particles with Al(OH) 3 and LiOH·H2O as the starting materials. As a result of the heat-treatment of the starting materials, α-/β-LiAlO2 particles could be obtained. The amount of α-LiAlO2 particles in α-/β-LiAlO2 increased slightly as more organics were added. Additionally, when synthesised α-/β-LiAlO2 particles were heat-treated in a CO2 gas flow, β-LiAlO 2 was partially transformed to α-LiAlO2. In the second method, molten salts (Li2/Na2/ K2CO 3) were used as a catalyst to fabricate α-LiAlO2 as a major phase, however, this method requires a washing process which can produce unexpected impurities. In the third method, pure α-LiAlO2 was obtained by heat-treatment of cheap sources such as Li2CO3 and Al(OH) 3 at 600-800 °C. The mean particle size (604 nm-11.85 μm) and the specific surface area (3.22-11.4 m2 g-1) of a-LiAlO2 were suitable for reinforcing the matrix and tape casting. Lastly, this study examined the effect of CO2 for the synthesising of a-LiAlO2 particles.

Original languageEnglish
Pages (from-to)605-612
Number of pages8
JournalFuel Cells
Volume9
Issue number5
DOIs
Publication statusPublished - 2009 Oct

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology

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