Proton conduction of novel calcium phosphate nanocomposite membranes for high temperature PEM fuel cells applications

Ahmad Ka'ki, Abdulrahman Alraeesi, Amani Al-Othman, Muhammad Tawalbeh

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

This work describes the synthesis and evaluation of nanocomposite membranes based on calcium phosphate (CP)/ionic liquids (ILs) for high-temperature proton exchange membrane (PEM) fuel cells. Several composite membranes were synthesized by varying the mass ratios of ILs with respect to the CP and all supported on porous polytetrafluoroethylene (PTFE). The membranes exhibit high proton conductivities. Two ionic liquids were investigated in this study, namely, 1-Hexyl-3- methylimidazolium tricyanomethanide, [HMIM][C4N3], and 1-Ethyl-3-methylimidazolium methanesulfonate, [EMIM][CH3O3S]. At room temperature, the CP/PTFE/[HMIM][C4N3] composite membrane possessed a high proton conductivity of 0.1 S cm−1. When processed at 200 °C, and fully anhydrous conditions, the membrane showed a conductivity of 3.14 × 10−3 S cm−1. Membranes based on CP/PTFE/[EMIM][CH3O3S] on the other hand, had a maximum proton conductivity of 2.06 × 10−3 S cm−1 at room temperature. The proton conductivities reported in this work appear promising for the application in high-temperature PEMFCs operated above the boiling point of water.

Original languageEnglish
Pages (from-to)30641-30657
Number of pages17
JournalInternational Journal of Hydrogen Energy
Volume46
Issue number59
DOIs
Publication statusPublished - Aug 26 2021

Keywords

  • Calcium phosphate
  • Composite membranes
  • Fuel cells
  • High temperature PEM
  • Ionic liquids

ASJC Scopus subject areas

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

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