Publikace detail

Direct approach for impedance analysis of ion conducting glasses

Autoři: Fraenkl Max | Wágner Tomáš | Shimakawa Koichi | Macák Jan | Patil Deepak

Rok: 2014

Druh publikace: ostatní - přednáška nebo poster

Strana od-do: nestránkováno

Tituly:

Jazyk	Název	Abstrakt	Klíčová slova
eng	Direct approach for impedance analysis of ion conducting glasses	Solid-state ion conductors are an important class of materials. These materials attract considerable interest due to their potential applications in the field of electrolytes in batteries and fuel cells, gas sensors, etc.[1,2] Electrochemical impedance spectroscopy (EIS) is powerful method for understanding dynamics of ionic transport. Measured data are mainly analyzed by using equivalent electrical circuits (EEC) or Poisson-Nernst-Planck (PNP) equation [3]. The EEC method does not provide physical parameters such as the diffusion coefficient, the number of mobile ions, etc. The PNP approach (in principal macroscopic method) is not so popular, probably due to the high mathematical complexity. Being unhappy with these drawbacks and limitations we propose our direct microscopic approach of analysis EIS [4-6]. Studied systems are chlacogenide glasses doped with Ag. Our model based on Dyre’s random walk theory [7].Give us directly important physical parameters, such as i, iffusion coefficient of ions and ii, number of mobile ions The study shows, how helpful this approach can be to understand the electrode polarization as well as ionic transport mechanism. Proposed approach can be used for description of the various ion conductive systems.	solid state ionic conductor, impedance analysis, random walk, chalcogenide glasses

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