Chinese Journal of Chemical Engineering ›› 2012, Vol. 20 ›› Issue (4): 776-783.

• 材料与产品工程 • 上一篇    下一篇

薄姆石合成亚微米γ-偏铝酸锂

程健1,2, 郭烈锦1, 许世森2, 张瑞云2, 李晨2   

  1. 1 School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China 2 Huaneng Clean Energy Technology Institute, Beijing 100086, China
  • 收稿日期:2011-07-26 修回日期:2012-03-15 出版日期:2012-08-28 发布日期:2012-03-15

Submicron γ-LiAlO2 powder synthesized from boehmite

CHENG Jian1,2, GUO Liejin1, XU Shisen2, ZHANG Ruiyun2, LI Chen2   

  1. 1 School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China 2 Huaneng Clean Energy Technology Institute, Beijing 100086, China
  • Received:2011-07-26 Revised:2012-03-15 Online:2012-08-28 Published:2012-03-15

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 °C, 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 pow-der. The testing results showed that the matrix performed well in preventing gas leakage.

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

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 °C, 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 pow-der. The testing results showed that the matrix performed well in preventing gas leakage.

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