University of PardubiceFaculty of Chemical Technology

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Impedance spectroscopy based conductivity study of two aluminum metal-organic framework compound

Authors: Konale Manisha Swarup | Lin Chia - Her | Patil Deepak | Zima Vítězslav | Wágner Tomáš | Shimakawa Koichi

Year: 2014

Type of publication: ostatní - přednáška nebo poster

Page from-to: nestránkováno

Titles:

Language	Name	Abstract	Keywords
eng	Impedance spectroscopy based conductivity study of two aluminum metal-organic framework compound	"Impedance spectroscopy (IS) is becoming a popular analytical tool in materials research and development because it involves a relatively simple electrical measurement and whose results may often be correlated with many complex materials variables: from mass transport, rates of chemical reactions, corrosion, and dielectric properties, to defects, microstructure, and compositional influences on the conductance of solids. IS is used for studying the properties of ionic solids, it can also predict aspects of the performance of chemical sensors and fuel cells. We use this method for the determination of proton conductivity of layered materials and three dimensional materials like metal organic coordination polymers (frameworks). The coordination polymers can be synthesized in different ways and used for specific application such as proton conductors. The proton conductivity in metal−organic frameworks (MOFs) could approach the specifications required for fuel cell proton exchange membranes (PEMs). Here we report conducting properties of new metal organic framework material, Al(OH)(bpdc) (DUT-5). An aluminium metal-organic framework (MOF) has been synthesized under solvothermal conditions from an aluminium salt and biphenyl-4,4’-dicarboxylic acid (H2bpdc). We studied the proton conductivity of this MOF as a function of relative humidity; we found that conductivity is drastically increased at relative humidity from 70 to 80%. The thermal dependence of conductivity was also studied with the aim to determine the activation energy of the conductivity process. "	Impedance spectroscopy, random walk, ion conductors