Bounded diffusion in solid solution electrode powder compacts. Part III. The kinetic properties of AgxTiS2 and AgxNiPS3

Honders, A.; Young, E.; Hintzen, A.J.H.; Wit, J.H.W. de; Broers, G.H.J.

doi:10.1016/0167-2738(85)90130-4

Cited by 16 publications

(1 citation statement)

References 6 publications

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“…The ohmic cell resistance, R, includes the interface resistances at both types of electrodes, the bulk resistance of the solid electrolyte (AgI) and the total conductivity (sum of the electronic and ionic conductivity) of the mixed conducting sample. When the polarization of the mixed conductor in cell I is caused by a chemical diffusion process, the time dependence of either the cell voltage, U,,, or the electric x (t + t) + 2tet, /SiflhL J] [l 2L/3D x2) for the voltage response U can be expressed as '8 where Z0 is defined as 2I 3P'Ago x (t + t) [13] U= JR -AF2 3c [8] whereas the longtime approximation (t >> L2/4D) is given with a, being the ionic conductivity of the mixed conductor, by '8 Equation 7 represents the exact solution for impedance spectroscopy on mixed conductors with arbitrary electronic transport numbers located between blocking electrodes in [14] an asymmet-ic electrochemical cell. At fairly high frequencies, Eq.…”

Section: Theorymentioning

confidence: 99%

Determination of Chemical Diffusion Coefficients of Mixed Ionic‐Electronic Conductors with Arbitrary Electronic Transport Numbers: Application of Impedance, Potentiostatic, and Galvanostatic Methods to

Preis

Sitte

1998

J. Electrochem. Soc.

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The solution of the diffusion equation for chemical diffusion processes in a mixed conductor located between an electronically blocking electrode and an ionically blocking electrode in an asymmetric electrochemical cell (coulometric titration cell) has been extended to materials with arbitrary electronic transport numbers. This solution allows the derivation of evaluation formulas for impedance spectroscopy as well as potentiostatic and galvanostatic polarization experiments in order to determine the chemical diffusion coefficient of mixed-conductivity compounds with comparable ionic and electronic conductivities. Impedance measurements as well as potentiostatic and galvanostatic polarization experiments are applied to determine the chemical diffusion coefficient of Ag1 92Te as a function of composition at 160°C using the cell Ag I AgI I Ag, 92Te I Pt. Ag1 92Te may be regarded as a typical example of a mixed ionic-electronic conductor with comparable ionic and electronic conductivities. The electronic transport numbers of Ag1 92Te needed for the evaluation of the chemical diffusion coefficient measurements are obtained from separate measurements of the partial conductivities by applying a dc four-point van der Pauw method. Typical values of the electronic transport number are in the range between 0 8 and 0.9 at 160°C. The chemical diffusion coefficient of Ag1 92Te increases slightly with increasing silver content of the sample, with typical values around 0.003 cm2 s In the case of potentiostatic polarization experiments, a non-Cottrell behavior of the chemical diffusion process is observed. Agreement between the experimental results of the three methods is remarkably good.

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Section: Theorymentioning

confidence: 99%

Determination of Chemical Diffusion Coefficients of Mixed Ionic‐Electronic Conductors with Arbitrary Electronic Transport Numbers: Application of Impedance, Potentiostatic, and Galvanostatic Methods to

Preis

Sitte

1998

J. Electrochem. Soc.

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Non‐Cottrell Behaviour of Potentiostatic Processes in Mixed Conductors with Comparable Ionic and Electronic Conductivities

Preis

1997

Ber Bunsenges Phys Chem

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A theoretical investigation of potentiostatic polarization processes in mixed conductors with arbitrary electronic transport numbers has been performed. As the potentiostatic polarization is accompanied by a chemical diffusion process inside the mixed conductor located between blocking electrodes, Fick's second law of diffusion has been solved for asymmetric electrochemical cells in order to obtain concentration profiles of the mobile species, current‐time relationships and the impedance of the asymmetric cell. Ohmic interfacial resistances as well as the ohmic bulk resistance owing to the total conductivity of the mixed conductor are considered. The theoretical results reveal that chemical diffusion processes in mixed conductors with comparable ionic and electronic conductivities show non‐Cottrell behaviour resulting in non‐Cottrell type current‐time relationships. These relations allow the exact description of the short‐time behaviour of potentiostatic diffusion processes occurring during chronoamperometric measurements. In addition, the non‐Cottrell behaviour of potentiostatic processes in mixed conductors with arbitrary electronic transport numbers employed in symmetric electrochemical cells is discussed.

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Design and optimization of solid-state microbatteries

Julien

Nazri

1994

The Kluwer International Series in Engineering and Computer Science

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Bounded diffusion in solid solution electrode powder compacts. Part III. The kinetic properties of AgxTiS2 and AgxNiPS3

Cited by 16 publications

References 6 publications

Determination of Chemical Diffusion Coefficients of Mixed Ionic‐Electronic Conductors with Arbitrary Electronic Transport Numbers: Application of Impedance, Potentiostatic, and Galvanostatic Methods to

Determination of Chemical Diffusion Coefficients of Mixed Ionic‐Electronic Conductors with Arbitrary Electronic Transport Numbers: Application of Impedance, Potentiostatic, and Galvanostatic Methods to

Non‐Cottrell Behaviour of Potentiostatic Processes in Mixed Conductors with Comparable Ionic and Electronic Conductivities

Design and optimization of solid-state microbatteries

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