Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 34, Pages 28656-28663Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b09070
Keywords
metal-organic frameworks; MOF-polymer composite membrane; proton-exchange membrane; chemical stability; proton conductivity
Funding
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- National Nature Science Foundation of China [21671100]
- Postgraduate Research & Practice Innovation Program of Jiangsu Province [KYCX17_0930]
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Proton-exchange membranes (PEMs), characterized by selectively permitting the transfer of protons and acting as a separator in electrochemical devices, have attracted immense attention. The composite membrane, fabricated from organic polymer matrix and high proton-conducting metal-organic framework (MOF), integrates the excellent physical and chemical performances of the polymer and MOF, achieving collective properties for good-performance PEMs. In this study, we demonstrate that MOF-801 shows remarkable proton conductance with sigma = 1.88 X 10(-3) S cm(-1) at 298 K and 98% relative humidity (RH), specifically, together with extra stability to hydrochloric acid or diluting sodium hydroxide aqueous solutions and boiling water. Furthermore, the composite membranes (denoted MOF-801@PP-X, where X represents the mass percentage of MOF-801 in the membrane) have been fabricated using the sub-micrometer-scale crystalline particles of MOF-801 and blending the poly(vinylidene fluoride)-poly(vinylpyrrolidone) matrix, and these PEMs display high proton conductivity, with sigma = 1.84 X 10(-3) S cm(-1) at 325 K 98% RH. A composite membrane as PEM was assembled into H-2/O-2 fuel cell for tests, indicating that these membrane materials have vast potential for PEM application on electrochemical devices.
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