Assessment of the long-term stability of the polymer of intrinsic microporosity PIM-1 for hydrogen storage applications

Sébastien Rochat, Katarzyna Polak-Kraśna, Mi Tian, Timothy J. Mays, Christopher R. Bowen, Andrew D. Burrows

Research output: Contribution to journalArticle (Academic Journal)peer-review

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Abstract

Polymers of intrinsic microporosity, such as PIM-1, advantageously combine high surface areas with good processability, which are attractive properties for hydrogen storage applications. Here we address the lack of data on the long-term mechanical stability and hydrogen uptake capacity of PIM-1 in a study carried out over 400 days. Our results show that most mechanical and surface properties of PIM-1 remain stable over this time. In particular, the mechanical strength and elasticity are maintained, and the surface area remains constant over the course of our observations. In contrast, we detected a small but statistically significant decrease of the hydrogen storage capacity of the material over time, particularly in the first stages of aging. We attribute this phenomenon to the slow rearrangement of the polymer scaffold in the solid state. Taken together, our experiments demonstrate that PIM-1 possesses the long-term stability required for realistic applications in hydrogen storage or in gas separation.

Original languageEnglish
Pages (from-to)332-337
Number of pages6
JournalInternational Journal of Hydrogen Energy
Volume44
Issue number1
Early online date30 Mar 2018
DOIs
Publication statusPublished - 1 Jan 2019

Keywords

  • Hydrogen storage
  • Long-term stability
  • Physisorption
  • Polymer of intrinsic microporosity
  • Porous material
  • Tensile test

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