Journal ArticleDOI
Single Crystal Proton Conduction Study of a Metal Organic Framework of Modest Water Stability
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A sulfonated indium (In) metal organic framework (MOF) is reported with an anionic layered structure incorporating hydrogen-bonded dimethylammonium cations and water molecules, revealing a very high proton conduction value for low humidity and moderate temperature.Abstract:
A sulfonated indium (In) metal organic framework (MOF) is reported with an anionic layered structure incorporating hydrogen-bonded dimethylammonium cations and water molecules The MOF becomes amorphous in >60% relative humidity; however, impedance analysis of pelletized powders revealed a proton conduction value of over 10–3 S cm–1 at 25 °C and 40% RH, a very high proton conduction value for low humidity and moderate temperature Given the modest humidity stability of the MOF, triaxial impedance analyses on a single crystal was performed and confirmed bulk proton conductivity over 10–3 S cm–1 along two axes corroborating the data from the pelletread more
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Metal-organic frameworks and their derived materials for electrochemical energy storage and conversion: Promises and challenges.
TL;DR: Some emerging applications of both groups of MOF-related materials as electrode materials for rechargeable batteries and electrochemical capacitors, efficient electrocatalysts, and even electrolytes for electrochemical devices are reviewed.
Journal ArticleDOI
Proton Transport in Metal-Organic Frameworks.
Dae-Woon Lim,Hiroshi Kitagawa +1 more
TL;DR: This Review aims to summarize and provide a comprehensive understanding of proton transport in MOFs and discusses the fundamental principles and various design strategies and implementations aimed at enhancing proton conductivity with representative examples.
Journal ArticleDOI
Straightforward Loading of Imidazole Molecules into Metal–Organic Framework for High Proton Conduction
Yingxiang Ye,Weigang Guo,Lihua Wang,Ziyin Li,Zhengju Song,Jun Chen,Zhangjing Zhang,Shengchang Xiang,Banglin Chen,Banglin Chen +9 more
TL;DR: Single crystal structure reveals that imidazole molecules in Im-Cu@(NENU-3a) isolate lattice water molecules and then block proton transport pathway, whereas high concentration of free imidAZole molecules within Im@ (NENu-3) significantly facilitate successive proton-hopping pathways through formation of hydrogen bonded networks.
Journal ArticleDOI
Achieving Superprotonic Conduction in Metal-Organic Frameworks through Iterative Design Advances.
SiRim Kim,Biplab Joarder,Jeff A. Hurd,Jinfeng Zhang,Karl W. Dawson,Benjamin S. Gelfand,Norman E. Wong,George K. H. Shimizu +7 more
TL;DR: Two complementary design strategies, isomorphous ligand replacement and heterocycle doping, have been applied to iteratively enhance the proton conductivity of a metal-organic framework, β-PCMOF2, and the resulting materials, PCMOF21/2(Pz), have their proton conduction raised almost 2 orders of magnitude.
Journal ArticleDOI
Metal-Organic Frameworks as a Versatile Platform for Proton Conductors.
TL;DR: Recent advances in MOFs as a versatile platform for proton conduction in the field of humidity condition proton-conduction, anhydrous atmosphere proon-Conduction, single-crystal proton Conduction, and including MOF-based membranes for fuel cells, are summarized and highlighted.
References
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Journal ArticleDOI
Approaches and Recent Development of Polymer Electrolyte Membranes for Fuel Cells Operating above 100 °C
TL;DR: In this article, a review of the area encompassing modified PFSA membranes, alternative sulfonated polymer and their composite membranes, and acid−base complex membranes is presented. But the authors do not discuss the performance of the composite membranes.
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MOFs as proton conductors – challenges and opportunities
TL;DR: This review will examine selected examples from this nascent field of metal Organic Frameworks, and will focus on the design and synthesis of proton conducting MOFs, their properties and conditions under which they operate.
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Impedance and dielectric spectroscopy revisited: Distinguishing localized relaxation from long-range conductivity
TL;DR: In this paper, the advantages of plotting a.c. data in terms of impedance, electric modulus, and dissipation factor simultaneously are illustrated, and the degree to which these assignments may be made is related to the dielectric relaxation ratio ( r = ϵ s ϵ ∞ ) and the differences between the time constants of the different relaxation processes present in the material being examined.
Journal ArticleDOI
Anhydrous proton conduction at 150 °C in a crystalline metal–organic framework
Jeff A. Hurd,Ramanathan Vaidhyanathan,Venkataraman Thangadurai,Christopher I. Ratcliffe,Igor L. Moudrakovski,George K. H. Shimizu +5 more
TL;DR: Na(3)(2,4,6-trihydroxy-1,3,5-benzenetrisulfonate) (named β-PCMOF2), a MOF that conducts protons in regular one-dimensional pores lined with sulfonate groups is reported.
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Ion conductivity and transport by porous coordination polymers and metal-organic frameworks.
TL;DR: The state-of-the-art of studies of ion conductivity by PCP/MOFs and nonporous coordination polymers (CPs) are described and future perspectives are offered.