Submicron γ-LiAlO2 Powder Synthesized from Boehmite

Abstract

Abstract: The present study reports a simple,effective and energy-efficient method to prepare γ-LiAlO₂ powder as a matrix in a molten carbonate fuel cell(MCFC).In our experiments,aqueous solution based sol-gel technique was used to synthesize γ-LiAlO₂.Highly dispersed AlOOH·nH₂O and LiOH·H₂O aqueous solutions were mixed to form a colloid mixture,which was calcined to synthesize γ-LiAlO₂.Thermogravimetric analysis(TGA),X-ray diffraction(XRD),and scanning electron microscopy(SEM) were used to study the composition and morphology of the intermediate and final products.The analysis results showed that an intermediate product Li₂Al₄CO₃(OH)₁₂ was produced after the colloid mixture was dried at 80℃,and highly purified γ-LiAlO₂ powder with fine particle size was resulted from the subsequent calcinations.A single MCFC was assembled with a matrix of the γ-LiAlO₂ powder.The testing results showed that the matrix performed well in preventing gas leakage.

Key words: boehmite, synthesis, submicron γ-LiAlO₂, molten carbonate fuel cell

摘要： The present study reports a simple,effective and energy-efficient method to prepare γ-LiAlO₂ powder as a matrix in a molten carbonate fuel cell(MCFC).In our experiments,aqueous solution based sol-gel technique was used to synthesize γ-LiAlO₂.Highly dispersed AlOOH·nH₂O and LiOH·H₂O aqueous solutions were mixed to form a colloid mixture,which was calcined to synthesize γ-LiAlO₂.Thermogravimetric analysis(TGA),X-ray diffraction(XRD),and scanning electron microscopy(SEM) were used to study the composition and morphology of the intermediate and final products.The analysis results showed that an intermediate product Li₂Al₄CO₃(OH)₁₂ was produced after the colloid mixture was dried at 80℃,and highly purified γ-LiAlO₂ powder with fine particle size was resulted from the subsequent calcinations.A single MCFC was assembled with a matrix of the γ-LiAlO₂ powder.The testing results showed that the matrix performed well in preventing gas leakage.

关键词: boehmite, synthesis, submicron γ-LiAlO₂, molten carbonate fuel cell

CHENG Jian, GUO Liejin, XU Shisen, ZHANG Ruiyun, LI Chen. Submicron γ-LiAlO₂ Powder Synthesized from Boehmite[J]. Chin.J.Chem.Eng., 2012, 20(4): 776-783.

程健, 郭烈锦, 许世森, 张瑞云, 李晨. Submicron γ-LiAlO₂ Powder Synthesized from Boehmite[J]. Chinese Journal of Chemical Engineering, 2012, 20(4): 776-783.

References

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Submicron γ-LiAlO₂ Powder Synthesized from Boehmite

Submicron γ-LiAlO₂ Powder Synthesized from Boehmite

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