Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 60, Issue 51, Pages 26577-26581Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202112922
Keywords
direct methanol fuel cells; hydrogen-bonding; multivariate FMOFs; proton conductivity; synergistic self-adaption
Categories
Funding
- Natural Science Foundation of China [21571077]
- Science and Technology Department of Jilin Province [20190303010SF]
- Interdisciplinary Research Grant for PhDs of Jilin University [101832020DJX027]
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A multivariate flexibility synergistic strategy was designed to achieve Flexible MOFs with high conductivity over a wide range of humidity. By constructing long-term durable MOF-based PEMs, a bridge between MOF and fuel cells was successfully established.
Improving proton conductivity and fabricating viable metal-organic frameworks (MOFs) based proton exchange membranes (PEMs) are central issues exploiting electrolyte MOFs. We aim to design multivariate flexibility synergistic strategy to achieve Flexible MOFs (FMOFs) with high conductivity at a wide range of humidity. In situ powder X-ray diffraction (PXRD) and temperature-dependent Fourier transform infrared spectra (FT-IR) prove the synergistic self-adaption between dynamic torsion of alkyl sulfonic acid and dynamic breathing of FMOF, forming a continuous hydrogen-bonding networks to maintain high conductivity. Based on the convincing proton conductivity, we construct a series of long-term durable MOF-based PEMs that serve as a bridge between MOF and fuel cell. Consequently, the membrane electrode assembly (MEA) of the flexible PMNS1-40 exhibits a maximum single-cell power density of 34.76 mW cm(-2) and hopefully opens doors to evaluate the practical application of proton-conducting MOFs in direct methanol fuel cells.
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