Mechanical strength of porous nickel plates containing lithium and their performance as the cathode for MCFC

Seung Goo Kim, Sung Pil Yoon, Jonghee Han, Suk Woo Nam, Tae Hoon Lim, In Hwan Oh, Seong Ahn Hong

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

To improve the mechanical properties of MCFC cathode materials, pre-lithiated porous nickel plates containing 1-5mol% of lithium were fabricated by the tape casting method, and the microstructures, mechanical properties, and performance was examined. The microstructure and pore distribution was not changed until the lithum content reached 3mol%. The sample containing 5mol% of lithium had patch structure on the skeleton and a smaller volume of primary pores. XRD analysis showed that lithium-containing porous nickel plates can easily form solid solutions without any undesirable byproducts after the oxidation. Both the bending strength and Young's modulus of the porous plates increased with the increase of lithium content. The average bending strengths of the samples containing 1, 3, and 5mol% of lithium were 1.29, 1.33, and 1.49kgf/mm2 which were 2.9, 3.0, and 3.4 times higher than that of pure porous nickel plate. The Young's modulus increased up to 1.35kgf/mm in the case of the 5 mol% lithium containing sample that is 5.4 times higher than that of pure porous nickel plate. The OCV of single cells using pre-lithiated cathodes were between 1.065 and 1.067 V, and comparable cell performance was obtained for 500 h of single cell operation.

Original languageEnglish
Pages (from-to)80-85
Number of pages6
JournalJournal of Power Sources
Volume110
Issue number1
DOIs
Publication statusPublished - 2002 Jul 20

Keywords

  • Cathode
  • Lithiated nickel oxide
  • MCFC
  • Mechanical strength
  • Single cell performance

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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