Hydrogen generation system using sodium borohydride for operation of a 400 W-scale polymer electrolyte fuel cell stack

Sun Ja Kim, Jaeyoung Lee, Kyung Yong Kong, Chang Ryul Jung, In Gyu Min, Sang Yeop Lee, Hyoung Juhn Kim, Suk Woo Nam, Tae Hoon Lim

Research output: Contribution to journalArticle

64 Citations (Scopus)

Abstract

Sodium borohydride (NaBH4) in the presence of sodium hydroxide as a stabilizer is a hydrogen generation source with high hydrogen storage efficiency and stability. It generates hydrogen by self-hydrolysis in aqueous solution. In this work, a Co-B catalyst is prepared on a porous nickel foam support and a system is assembled that can uniformly supply hydrogen at >6.5 L min-1 for 120 min for driving 400-W polymer electrolyte membrane fuel cells (PEMFCs). For optimization of the system, several experimental conditions were changed and their effect investigated. If the concentration of NaBH4 in aqueous solution is increased, the hydrogen generation rate increases, but a high concentration of NaBH4 causes the hydrogen generation rate to decrease because of increased solution viscosity. The hydrogen generation rate is also enhanced when the flow rate of the solution is increased. An integrated system is used to supply hydrogen to a PEMFCs stack, and about 465 W power is produced at a constant loading of 30 A.

Original languageEnglish
Pages (from-to)412-418
Number of pages7
JournalJournal of Power Sources
Volume170
Issue number2
DOIs
Publication statusPublished - 2007 Jul 10

Keywords

  • Co-B catalyst
  • Hydrogen generation
  • Polymer electrolyte fuel cell
  • Sodium borohydride

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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    Kim, S. J., Lee, J., Kong, K. Y., Ryul Jung, C., Min, I. G., Lee, S. Y., Kim, H. J., Nam, S. W., & Lim, T. H. (2007). Hydrogen generation system using sodium borohydride for operation of a 400 W-scale polymer electrolyte fuel cell stack. Journal of Power Sources, 170(2), 412-418. https://doi.org/10.1016/j.jpowsour.2007.03.083