The Evaluation of Ionic Conductivity in Polymer Electrolyte Membranes

2008 ◽  
Vol 59 (10) ◽  
Author(s):  
Danut-Ionel Vaireanu ◽  
Ioana Maior ◽  
Alexandra Grigore ◽  
David Savoiu
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Ionic Conductivity ◽  
Impedance Spectroscopy ◽  
Polymer Electrolyte ◽  
Electrochemical Cell ◽  
Electrochemical Impedance ◽  
Polymer Electrolyte Membranes ◽  
Membrane Thickness ◽  
Electrolyte Membranes ◽  
Conducting Membranes

A novel electrochemical cell for the evaluation of the ionic conductivity in polymer conducting membranes is proposed. This cell has the advantages of being able to determine with high precision the membrane thickness during electrochemical impedance spectroscopy measurements. A conductivity factor is also proposed in order to classify various membranes with respect to their conductivity versus a reference membrane, namely Nafion� 117.

Use and misuse of electrochemical impedance spectroscopy in PEFC research

2019 ◽  
Author(s):  
Pierre Boillat ◽  
Lorenz Gubler ◽  
Felix N. Büchi ◽  
Thomas J. Schmidt
Keyword(s):  
Fuel Cells ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Polymer Electrolyte ◽  
Electrochemical Impedance ◽  
Polymer Electrolyte Fuel Cells ◽  
Impedance Spectra ◽  
Electrochemical Impedance Spectra ◽  
Comprehensive Review ◽  
Research Show

In this presentation, two important pitfalls ocuring during the analysis of electrochemical impedance spectra (EIS) of polymer electrolyte fuel cells (PEFCs) are discussed. Based on very simple considerations, some commonly found interpretation statements are identified as wrong. A comprehensive review of the papers published during the year 2018 using EIS in PEFC research show that such wrong statements are not occasional, but frequently occurring in the peer reviewed literature. At the end of the presentation, solution are proposed to increase the awareness to the risks of wrong EIS interpretations.

scholarly journals Electrochemical Impedance Spectroscopy as a Diagnostic Tool in Polymer Electrolyte Membrane Electrolysis

Materials ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1368 ◽  
Author(s):  
Stefania Siracusano ◽  
Stefano Trocino ◽  
Nicola Briguglio ◽  
Vincenzo Baglio ◽  
Antonino Aricò
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Polymer Electrolyte ◽  
Diagnostic Tool ◽  
Electrochemical Impedance ◽  
Polymer Electrolyte Membrane ◽  
Membrane Electrode ◽  
Short Side ◽  
Electrolyte Membrane ◽  
The Impact

Membrane–electrode assemblies (MEAs) designed for a polymer electrolyte membrane (PEM) water electrolyser based on a short-side chain (SSC) perfluorosulfonic acid (PFSA) membrane, Aquivion®, and an advanced Ir-Ru oxide anode electro-catalyst, with various cathode and anode noble metal loadings, were investigated. Electrochemical impedance spectroscopy (EIS), in combination with performance and durability tests, provided useful information to identify rate-determining steps and to quantify the impact of the different phenomena on the electrolysis efficiency and stability characteristics as a function of the MEA properties. This technique appears to be a useful diagnostic tool to individuate different phenomena and to quantify their effect on the performance and degradation of PEM electrolysis cells.

Characterization of Thermal Behavior of Commercial NCR 18650B Batteries under Varying Cycling Conditions

MRS Advances ◽  
2017 ◽  
Vol 2 (54) ◽  
pp. 3329-3334 ◽  
Author(s):  
Bo Dong ◽  
Kazi Ahmed ◽  
Yige Li ◽  
Cengiz Sinan Ozkan ◽  
Mihrimah Ozkan
Keyword(s):  
Structural Change ◽  
Electrochemical Impedance Spectroscopy ◽  
Ionic Conductivity ◽  
Impedance Spectroscopy ◽  
Thermal Behavior ◽  
Electrochemical Impedance ◽  
Spectroscopy Technique ◽  
Impedance Spectroscopy Technique

ABSTRACTTo better understand the condition of commercial batteries used in Tesla EVs and stationary applications under real performing situations, this article focuses on tracking the temperature of commercial batteries during varying cycling conditions. We have found evidence of significant impact of cycling methods on batteries in ionic conductivity, inner impedance development, and structural change in both cathode and anode electrodes, which will be further analyzed by electrochemical impedance spectroscopy technique in the following research.

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