The effect of lithium addition on aluminum-reinforced α-LiAlO 2 matrices for molten carbonate fuel cells

Kailash Yashvant Patil, Sung Pil Yoon, Jonghee Han, Tae Hoon Lim, Suk Woo Nam, In Hwan Oh

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The effect of lithium hydroxide (LiOH) addition as a lithium source is discussed as a way to prevent Li-ion shortages in aluminum-based α-LiAlO2 matrices of molten carbonate fuel cells. Our results show that the use of LiOH as a lithium source to prevent a Li-ion shortage caused by a lithiated Al-reaction during the operation of the cell allows for more stable performance and greater durability than when lithium carbonate (Li2CO3) is used as the lithium source. The behavior of high-lithium content mixtures is attributed to the presence of reactive aluminum particles, which promote the formation of lithium aluminate (LiAlO2) phases at 650 °C. The incorporation of low-melting-point lithium and an efficient pathway to the aluminum in a reinforced matrix has improved the in-situ mechanical strength via the lithiated Al-reaction, and they do not lead to any noticeable loss in cell performance, even after 4000 h of operation. From the post-test results, the cell with LiOH stored in the cathode channel shows effective formation of the stable crystalline phase of α-LiAlO2 and enhancement of the mechanical strength during cell operation.

Original languageEnglish
Pages (from-to)6237-6247
Number of pages11
JournalInternational Journal of Hydrogen Energy
Volume36
Issue number10
DOIs
Publication statusPublished - 2011 May

Keywords

  • Al-particles reinforced matrix
  • Lithium shortage
  • Molten carbonate fuel cell
  • Reinforced α-lithium aluminate matrix

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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