Quantitative impedance analysis of solid ionic conductors: Effects of electrode polarization

2014 ◽  
Vol 115 (14) ◽  
pp. 143707 ◽  
Author(s):  
D. S. Patil ◽  
K. Shimakawa ◽  
V. Zima ◽  
T. Wagner
Keyword(s):  
Impedance Analysis ◽  
Electrode Polarization ◽  
Ionic Conductors

Electrode Polarization of Ionic Conductors

1972 ◽  
Vol 43 (3) ◽  
pp. 927-934 ◽  
Author(s):  
S. P. Mitoff ◽  
R. J. Charles
Keyword(s):  
Electrode Polarization ◽  
Ionic Conductors

Electrical impedance analysis in plant tissues: in vivo detection of freezing injury

1992 ◽  
Vol 70 (11) ◽  
pp. 2254-2258 ◽  
Author(s):  
M. I. N. Zhang ◽  
J. H. M. Willison
Keyword(s):  
Electrical Impedance ◽  
Solanum Tuberosum L ◽  
Nonlinear Least Squares ◽  
Impedance Analysis ◽  
Freezing Injury ◽  
Electrode Polarization ◽  
Electrode Impedance ◽  
Membrane Injury ◽  
Tissue Impedance

Freezing injury of potato tuber tissue was studied by measuring electrical impedance, in the range of 100 Hz to 800 KHz, while the tissue was subjected to a −3 °C environment. It was found that a greater proportion of total impedance was due to electrode polarization in frozen tissues than in nonfrozen tissues. In frozen tissue, electrode impedance could be so great that tissue impedance could not be measured reliably. Analysis of tissue impedance using complex nonlinear least squares revealed some dynamics of the process of tissue freezing. After 1 h of exposure to freezing conditions, extracellular resistance began a sustained decrease. This can be explained by electrolyte leakage to extracellular space, presumably as a result of membrane injury. The capacitances of both plasma membrane and tonoplast also decreased with freezing. Key words: potato (Solanum tuberosum L.) tuber, electrical impedance, freezing injury, membrane capacitance.

Electrode polarization of ionic conductors

1973 ◽  
Vol 44 (8) ◽  
pp. 3455-3458 ◽  
Author(s):  
J. Ross Macdonald
Keyword(s):  
Electrode Polarization ◽  
Ionic Conductors

Cellulose acetate–lithium bis(trifluoromethanesulfonyl)imide solid polymer electrolyte: ATR-FTIR and ionic conductivity behavior

2015 ◽  
Vol 08 (03) ◽  
pp. 1540017 ◽  
Author(s):  
Siti Masyitah Mohd Razalli ◽  
Siti Irma Yuana Sheikh Mohd Saaid ◽  
Ab Malik Marwan Ali ◽  
Oskar Hasdinor Hassan ◽  
Muhd Zu Azhan Yahya
Keyword(s):  
Ionic Conductivity ◽  
Cellulose Acetate ◽  
Polymer Electrolytes ◽  
Electrochemical Impedance ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Electrode Polarization ◽  
Ionic Conductors ◽  
Low Frequencies ◽  
Solution Cast

Solid polymer electrolytes (SPEs) based on cellulose acetate (CA) doped with lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) salt are prepared by solution cast technique. Attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy of the polymer salt complexes are recorded in the frequency range between 400 cm-1 and 4000 cm-1. The shifting of carbonyl band ( C=O ) at 1737 cm-1 to a lower wavenumber confirms the occurrence of complexation between the polymer and the salt. The electrochemical impedance spectroscopy (EIS) analysis discovered that the film with 25 wt.% of salt shows the highest ionic conductivity at room temperature. The change in real dielectric permittivity (εr) as a function of frequency at different salt concentrations which exhibits a dispersive behavior at low frequencies and decays at higher frequencies, shows the electrode polarization and space charge effect. The real modulus formalism (Mr) analysis shows that the polymer electrolytes in this work are ionic conductors.

The fate of aluminium in (Na,Bi)TiO3-based ionic conductors

2020 ◽  
Vol 8 (35) ◽  
pp. 18188-18197
Author(s):  
Pedro B. Groszewicz ◽  
Leonie Koch ◽  
Sebastian Steiner ◽  
Azatuhi Ayrikyan ◽  
Kyle G. Webber ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Dft Calculations ◽  
Ionic Conduction ◽  
Impedance Analysis ◽  
Ionic Conductors

The role of [AlTi–VO]˙ associated defects in ionic conduction in Al-doped (Na,Bi)TiO3 is clarified by a combination of impedance analysis, DFT calculations and NMR spectroscopy.

Orthogonal Electrode Micropump Design Using DC and AC Electroosmosis

2011 ◽  
Author(s):  
Nazmul Islam ◽  
Saief Sayed
Keyword(s):  
Fluid Flow ◽  
Flow Rate ◽  
Velocity Measurement ◽  
Impedance Analysis ◽  
Electrode Pair ◽  
Electrode Polarization ◽  
Fluid Flow Rate ◽  
Ac Electroosmosis ◽  
Net Flows ◽  
Capacitive Electrode

This paper investigates the micropumping action using orthogonal electrode pattern. It is reported in literature that the high microflows velocity can be achieved using orthogonal electrode pattern when excited by AC signals. Here in this paper we will investigate the effect of both AC and DC signal on orthogonal electrode pattern. We will also investigate the flow in an orthogonal electroosmotic micropump, where the combination of both DC and AC voltages were applied to optimize the fluid flow rate. The design of an orthogonal electrode pair, improves the non-uniformity in electric field, as a result producing stronger net flows at lower voltages. The capacitive electrode polarization and faradaic polarization are proposed to explain the different flow patterns. The fluid flow is explained by impedance analysis and velocity measurement. This investigation of microflow can improve the understanding of electrokinetics and hence effectively manipulate fluids.

Comments on ``Electrode polarization of ionic conductors''

1973 ◽  
Vol 44 (8) ◽  
pp. 3786-3787 ◽  
Author(s):  
S. P. Mitoff ◽  
R. J. Charles
Keyword(s):  
Electrode Polarization ◽  
Ionic Conductors

A transmission electron microscopic study of structural transitions in fast ionic conductors

1987 ◽  
Vol 45 ◽  
pp. 156-157
Author(s):  
R. B. Queenan ◽  
P. K. Davies
Keyword(s):  
Optical Properties ◽  
Ionic Conduction ◽  
Recent Observation ◽  
Ionic Conductivities ◽  
Sodium Aluminate ◽  
Two Dimensions ◽  
Ionic Conductors ◽  
Electron Microscopic ◽  
Transmission Electron ◽  
Trivalent Cations

Na ß“-alumina (Na1.67Mg67Al10.33O17) is a non-stoichiometric sodium aluminate which exhibits fast ionic conduction of the Na+ ions in two dimensions. The Na+ ions can be exchanged with a variety of mono-, di-, and trivalent cations. The resulting exchanged materials also show high ionic conductivities.Considerable interest in the Na+-Nd3+-ß“-aluminas has been generated as a result of the recent observation of lasing in the pulsed and cw modes. A recent TEM investigation on a 100% exchanged Nd ß“-alumina sample found evidence for the intergrowth of two different structure types. Microdiffraction revealed an ordered phase coexisting with an apparently disordered phase, in which the cations are completely randomized in two dimensions. If an order-disorder transition is present then the cooling rates would be expected to affect the microstructures of these materials which may in turn affect the optical properties. The purpose of this work was to investigate the affect of thermal treatments upon the micro-structural and optical properties of these materials.

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