4.6 Article

Cu-MOF@PVP/PVDF hybrid composites as tunable proton-conducting materials

Journal

JOURNAL OF SOLID STATE CHEMISTRY
Volume 310, Issue -, Pages -

Publisher

ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2022.123070

Keywords

Metal-organic frameworks; Proton-exchange membrane; MOF-Polymer composite membrane; Proton conduction

Funding

  1. National Natural Science Foundation of China [21671119, 21971143]
  2. Distinguished Youth Foundation of Hubei province [2020CFA092]
  3. 111 Project [DT20015]
  4. Program for Innovative Teams of Outstanding Young and Middle-aged Researchers in the Higher Education Institutions of Hubei Province [T201904]
  5. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry [2020-13]

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Metal organic frameworks (MOFs) and polymer composite membranes have shown great potential as tunable proton-conducting materials in the field of fuel cells (FCs). This study successfully introduced a Cu(II)-based MOF into poly(vinylpyrrolidone)/poly(vinylidene fluoride) (PVP/PVDF) to fabricate hybrid membranes. Cu-MOF@PP-50 exhibited significantly higher proton conductivity compared to the parent Cu-MOF.
Proton exchange membrane (PEM) is one of the core materials which were widely used in the field of fuel cells (FCs). In recent years, the metal organic frameworks (MOFs) and polymer composite membranes as tunable proton-conducting materials have showed great potential in this field. Herein, a Cu(II)-based metal organic framework (Cu-MOF) with acid/base stability was introduced into poly(vinylpyrrolidone)/poly(vinylidene fluo-ride) (PVP/PVDF, PP) to fabricate hybrid membranes(Cu-MOF@PP-X, where X is the % Cu-MOF content). The effects of Cu-MOF loading amounts on the conductive behavior of Cu-MOF@PP-X composites have been docu-mented. It is worth noting that Cu-MOF@PP-50 exhibited the proton conductivity up to 4.36 x 10(-4) S cm(-1) at 353 K and 98% relative humidity (RH). In addition, the value of proton conduction is about two orders of magnitude higher than that of the parent Cu-MOF (1.91 x 10(-6) S cm(-1)). This work contributes to driving further advances of MOF/polymer composites in proton-conducting apparatus.

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