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

Heon-Jin Choi, J. J. Lee, S. H. Hyun, H. C. Lim

Research output: Contribution to journalArticle

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 1

Fingerprint

Molten carbonate fuel cells (MCFC)
Heat treatment
Powders
Catalysts
Glycols
Glycerol
Washing
Specific surface area
Tapes
Flow of gases
Molten materials
Costs
Casting
Lithium
Particle size
Impurities
Salts
Fabrication
Hot Temperature

All Science Journal Classification (ASJC) codes

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

Cite this

Choi, Heon-Jin ; Lee, J. J. ; Hyun, S. H. ; Lim, H. C. / Cost-effective synthesis of a-LiAlO2 powders for molten carbonate fuel cell matrices. In: Fuel Cells. 2009 ; Vol. 9, No. 5. pp. 605-612.
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Cost-effective synthesis of a-LiAlO2 powders for molten carbonate fuel cell matrices. / Choi, Heon-Jin; Lee, J. J.; Hyun, S. H.; Lim, H. C.

In: Fuel Cells, Vol. 9, No. 5, 01.10.2009, p. 605-612.

Research output: Contribution to journalArticle

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