Fast stack activation procedure and effective long-term storage for high-performance polymer electrolyte membrane fuel cell

Seung Yong Yang, Dong Jun Seo, Myeong Ri Kim, Min Ho Seo, Sun Mi Hwang, Yong Min Jung, Beom Jun Kim, Young Gi Yoon, Byungchan Han, Tae Young Kim

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Time-saving stack activation and effective long-term storage are one of most important issues that must be resolved for the commercialization of polymer electrolyte membrane fuel cell (PEMFC). Herein, we developed the cost-effective stack activation method to finish the whole activation within 30 min and the long-term storage method by using humidified N2 without any significant decrease in cell's performance for 30 days. Specifically, the pre-activation step with the direct injection of DI water into the stack and storage at 65 or 80 °C for 2 h increases the distinctive phase separation between the hydrophobic and hydrophilic regions in Nafion membrane, which significantly reduces the total activation time within 30 min. Additionally, the long-term storage with humidified N2 has no effect on the Pt oxidation and drying of Nafion membrane for 30 days due to its exergonic reaction in the cell. As a result, the high water content in Nafion membrane and the decrease of Pt oxidation are the critical factors that have a strong influence on the activation and long-term storage for high-performance PEMFC.

Original languageEnglish
Pages (from-to)75-80
Number of pages6
JournalJournal of Power Sources
Volume328
DOIs
Publication statusPublished - 2016 Oct 1

All Science Journal Classification (ASJC) codes

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

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    Yang, S. Y., Seo, D. J., Kim, M. R., Seo, M. H., Hwang, S. M., Jung, Y. M., Kim, B. J., Yoon, Y. G., Han, B., & Kim, T. Y. (2016). Fast stack activation procedure and effective long-term storage for high-performance polymer electrolyte membrane fuel cell. Journal of Power Sources, 328, 75-80. https://doi.org/10.1016/j.jpowsour.2016.08.006