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Abstract：
The design of stable electrolyte materials with high proton conductivity for use in proton exchange membrane fuel cells remains a challenge. Most of the materials explored have good conductivity at high relative humidity (RH), but significantly decreased conductivity at reduced RH. Here we report a chemically stable and structurally flexible metal-organic framework (MOF), BUT-8(Cr) A, possessing a three-dimensional framework structure with one-dimensional channels, in which high-density sulfonic acid (-SO3H) sites arrange on channel surfaces for proton conduction. We propose that its flexible nature, together with its-SO3H sites, could allow BUT-8(Cr) A to self-adapt its framework under different humid environments to ensure smooth proton conduction pathways mediated by water molecules. Relative to other MOFs, BUT-8(Cr) A not only has a high proton conductivity of 1.27 x 10(-1) S cm(-1) at 100% RH and 80 degrees C but also maintains moderately high proton conductivity at a wide range of RH and temperature.
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NATURE ENERGY
ISSN： 2058-7546
Year： 2017
Issue： 11
Volume： 2
5 6 . 7 0 0
JCR@2022
CAS Journal Grade：1
Cited Count：
WoS CC Cited Count： 624
SCOPUS Cited Count： 542
ESI Highly Cited Papers on the List： 37 Unfold All
WanFang Cited Count：
Chinese Cited Count：
30 Days PV： 1
