Space charges in solid electrolytes detected by the scanning Kelvin probe

Martin, B.; Kliem, H.

doi:10.1016/j.jnoncrysol.2009.07.038

Cited by 9 publications

(13 citation statements)

References 20 publications

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“…Such behavior can be ascribed to the effect from SCP intrinsic for PEO . This process arises from macroscopic charge transfer toward the electrodes.…”

Section: Resultsmentioning

confidence: 99%

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PEO‐PVP‐NaIO₄ Ion‐Conducting Polymer Electrolyte: Inspection for Ionic Space Charge Polarization and Charge Trapping

Hadjichristov

Ivanov

Marinov

et al. 2019

Physica Status Solidi (a)

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Ion‐conductive solid polymer electrolytes composed from blends of poly(ethylene oxide) (PEO) and poly(vinylpyrrolidone) (PVP), as complexed with the ionic compound sodium periodate (NaIO4), are inspected for the presence of electric charge trapping (CT) and ionic space charge polarization (SCP) under static electric field. Thin films (110 μm‐thick) of these materials are produced at a ratio of the polymers PEO:PVP = 70:30 wt%, the concentration of NaIO4 is 5, 7.5, or 10 wt%. The electrical current at room temperature, as well as the charging/discharging in the films are studied as depending on applied voltage and time. At a detectable level, no SCP and CT processes in PEO‐PVP‐NaIO4 are evidenced, in contrast to identical experiments by PEO film under the same experimental conditions. The largely reduced SCP and CT are of importance for electrochemical applications of the considered ion‐conducting PEO‐PVP‐NaIO4 ion‐polymer coupled system.

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“…Such behavior can be ascribed to the effect from SCP intrinsic for PEO . This process arises from macroscopic charge transfer toward the electrodes.…”

Section: Resultsmentioning

confidence: 99%

“…The ionic SCP in PEO is well established phenomenon . Actually, this process leads to high dielectric permittivity of PEO.…”

Section: Introductionmentioning

confidence: 99%

PEO‐PVP‐NaIO₄ Ion‐Conducting Polymer Electrolyte: Inspection for Ionic Space Charge Polarization and Charge Trapping

Hadjichristov

Ivanov

Marinov

et al. 2019

Physica Status Solidi (a)

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“…In the dielectric the injected charges are treated in the same way as the ionic charges but they have to surmount different intrinsic energy barriers . A more detailed description of the model is given in [6][7][8].…”

Section: Model Considerationsmentioning

confidence: 99%

“…Thus, the electrical properties of PEO salt complexes, copolymers, complex polymer blends, and PEO with addition of dielectric or ferroelectric nanoparticles are still studied extensively [1][2][3][4][5]. From dielectric measurements carried out in the frequency as well as in the time domain it is known that a space charge polarization of internal ions predominates in these systems [6][7][8]. Nonetheless, also the injection of extrinsic charges from the electrodes into the samples cannot be neglected especially at high applied fields and at long times, respectively [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…From dielectric measurements carried out in the frequency as well as in the time domain it is known that a space charge polarization of internal ions predominates in these systems [6][7][8]. Nonetheless, also the injection of extrinsic charges from the electrodes into the samples cannot be neglected especially at high applied fields and at long times, respectively [7][8][9]. Thus, the transient long-term current after application of voltage steps with different amplitudes is measured.…”

Section: Introductionmentioning

confidence: 99%

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Anomalous conduction current in PEO

Martin

Kliem

2013

2013 IEEE International Conference on Solid Dielectrics (ICSD)

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Thin films of the ion-conducting polymer polyethylene oxide (PEO) are used to investigate the transient current density through the samples after application of a voltage step. Applying the same voltage it is found experimentally that the long-term conduction current density response through the PEO is independent of the sample length. Qualitatively comparable results are obtained from computer simulations using a threedimensional hopping model. This model takes into account the movement of intrinsic ions as well as the injection of extrinsic electrons from the electrodes. It turns out that the width of a depletion zone at the negative electrode is responsible for the length independence of the current. This width mainly defines the long-term current and depends only on the applied voltage. The depletion zone can be determined experimentally with surface potential measurements performed with a scanning Kelvin probe.

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Transient formation of internal potentials in solid electrolytes

Martin

Kliem

2010

Journal of Applied Physics

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Electrode effects can play an important role in ion-conducting polymers in which a space charge polarization of mobile internal ions prevails. The ions are shifted in an external field and they are attracted to the electrodes due to Coulomb forces caused by their own image charges. These image charges influence the static and dynamic charge distribution. This can be proved experimentally by measurements of the transient surface potential with the scanning Kelvin probe using polyethylene oxide doped with lithium perchlorate (PEO-LiClO4). Simulations performed with a three-dimensional hopping model coincide with the experimental results qualitatively.

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Space charges in solid electrolytes detected by the scanning Kelvin probe

Cited by 9 publications

References 20 publications

PEO‐PVP‐NaIO₄ Ion‐Conducting Polymer Electrolyte: Inspection for Ionic Space Charge Polarization and Charge Trapping

PEO‐PVP‐NaIO₄ Ion‐Conducting Polymer Electrolyte: Inspection for Ionic Space Charge Polarization and Charge Trapping

Anomalous conduction current in PEO

Transient formation of internal potentials in solid electrolytes

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Space charges in solid electrolytes detected by the scanning Kelvin probe

Cited by 9 publications

References 20 publications

PEO‐PVP‐NaIO4 Ion‐Conducting Polymer Electrolyte: Inspection for Ionic Space Charge Polarization and Charge Trapping

PEO‐PVP‐NaIO4 Ion‐Conducting Polymer Electrolyte: Inspection for Ionic Space Charge Polarization and Charge Trapping

Anomalous conduction current in PEO

Transient formation of internal potentials in solid electrolytes

Contact Info

Product

Resources

About

PEO‐PVP‐NaIO₄ Ion‐Conducting Polymer Electrolyte: Inspection for Ionic Space Charge Polarization and Charge Trapping

PEO‐PVP‐NaIO₄ Ion‐Conducting Polymer Electrolyte: Inspection for Ionic Space Charge Polarization and Charge Trapping