Enhanced proton conductivity of nafion hybrid membrane under different humidities by incorporating metal-organic frameworks with high phytic acid loading

Zhen Li, Guangwei He, Bei Zhang, Ying Cao, Hong Wu, Zhongyi Jiang, Zhou Tiantian

Research output: Contribution to journalArticlepeer-review

167 Scopus citations

Abstract

In this study, phytic acid (myo-inositol hexaphosphonic acid) was first immobilized by MIL101 via vacuum-assisted impregnation method. The obtained phytic@MIL101 was then utilized as a novel filler to incorporate into Nafion to fabricate hybrid proton exchange membrane for application in PEMFC under different relative humidities (RHs), especially under low RHs. High loading and uniform dispersion of phytic acid in MIL 101(Cr) were achieved as demonstrated by ICP, FT-IR, XPS, and EDS-mapping. The phytic@MIL101 was dispersed homogeneously in the Nafion matrix when the filler content was less than 12%. Hybrid membranes were evaluated by proton conductivity, mechanical property, thermal stability, and so forth. Remarkably, the Nafion/phytic@MIL hybrid membranes showed high proton conductivity at different RHs, especially under low RHs, which was up to 0.0608 S cm-1 and 7.63 × 10-4 S cm-1 at 57.4% RH and 10.5% RH (2.8 and 11.0 times higher than that of pristine membrane), respectively. Moreover, the mechanical property of Nafion/phtic@MIL hybrid membranes was substantially enhanced and the thermal stability of membranes was well preserved. © 2014 American Chemical Society.
Original languageEnglish (US)
Pages (from-to)9799-9807
Number of pages9
JournalACS Applied Materials and Interfaces
Volume6
Issue number12
DOIs
StatePublished - Jun 25 2014
Externally publishedYes

Bibliographical note

Generated from Scopus record by KAUST IRTS on 2023-09-20

ASJC Scopus subject areas

  • General Materials Science

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