Polarization studies on mixed conductors with comparable ionic and electronic conductivities employed in asymmetric electrochemical cells

被引：9

作者：

Preis, W ^{[1
]}

Sitte, W ^{[1
]}

机构：

[1] GRAZ TECH UNIV,INST PHYS & THEORET CHEM,A-8010 GRAZ,AUSTRIA

来源：

SOLID STATE IONICS | 1996年 / 86-8卷

关键词：

mixed conductors; ionic conductivity; electronic conductivity; polarization; electrochemical cell;

D O I：

10.1016/0167-2738(96)00172-5

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The polarization process of mixed ionic-electronic conductors with comparable,ionic and electronic conductivities employed in asymmetric electrochemical cells is investigated. The polarization is assumed to be induced by chemical diffusion. The application of a constant current step to the cell is treated in detail. The exact solution of Fick's second law of diffusion is presented and polarization as well as depolarization curves for various electronic transference numbers are given. It will be demonstrated that the diffusion-induced polarization of a mixed conductor is minimized if the electronic transference number approaches the value 0.5, whereas the ohmic Voltage drop owing to the total conductivity attains its maximum value.

引用

页码：779 / 784

页数：6

共 18 条

[1] DYNAMIC ASPECTS OF SOLID-SOLUTION CATHODES FOR ELECTROCHEMICAL POWER SOURCES [J].

ATLUNG, S ;

WEST, K ;

JACOBSEN, T .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1979, 126 (08) :1311-1321

[2] SIMPLE HIERARCHICAL IMPEDANCE FUNCTIONS FOR ASYMMETRIC CELLS - THIN-LAYER CELLS AND MODIFIED ELECTRODES [J].

BUCK, RP ;

MADARAS, MB ;

MACKEL, R .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1993, 362 (1-2) :33-46

[3] DIFFUSION MIGRATION IMPEDANCES FOR FINITE, ONE-DIMENSIONAL TRANSPORT IN THIN-LAYER AND MEMBRANE CELLS .2. MIXED CONDUCTION CASES - OS(III)/OS(II)CIO4 POLYMER MEMBRANES INCLUDING STEADY-STATE IV RESPONSES [J].

BUCK, RP .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1987, 219 (1-2) :23-48

[4] DIFFUSION-MIGRATION IMPEDANCES FOR FINITE, ONE-DIMENSIONAL TRANSPORT IN THIN-LAYER AND MEMBRANE CELLS - AN ANALYSIS OF DERIVED ELECTRICAL QUANTITIES AND EQUIVALENT-CIRCUITS [J].

BUCK, RP .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1986, 210 (01) :1-19

[5] BOUNDED DIFFUSION IN SOLID-SOLUTION ELECTRODE POWDER COMPACTS .1. THE INTERFACIAL IMPEDANCE OF A SOLID-SOLUTION ELECTRODE (MXSSE) IN CONTACT WITH A M+-ION CONDUCTING ELECTROLYTE [J].

HONDERS, A ;

BROERS, GHJ .

SOLID STATE IONICS, 1985, 15 (03) :173-183

[6]

Julien C., 1994, Solid State Batteries: Materials Design and Optimization

[7] EVALUATION OF ELECTROCHEMICAL METHODS IN SOLID-STATE RESEARCH AND THEIR GENERALIZATION FOR DEFECTS WITH VARIABLE CHARGES [J].

MAIER, J .

ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE NEUE FOLGE, 1984, 140 (02) :191-215

[8] AN ALTERNATING-CURRENT IMPEDANCE MODEL INCLUDING MIGRATION AND REDOX-SITE INTERACTIONS AT POLYMER-MODIFIED ELECTRODES [J].

MATHIAS, MF ;

HAAS, O .

JOURNAL OF PHYSICAL CHEMISTRY, 1992, 96 (07) :3174-3182

[9] Theory of galvanostatic processes in mixed conductors with arbitrary electronic transport numbers [J].

Preis, W ;

Sitte, W .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1996, 92 (07) :1197-1203

[10] ELECTROCHEMICAL-CELL FOR COMPOSITION DEPENDENT MEASUREMENTS OF ELECTRONIC AND IONIC CONDUCTIVITIES OF MIXED CONDUCTORS AND APPLICATION TO SILVER TELLURIDE [J].

PREIS, W ;

SITTE, W .

SOLID STATE IONICS, 1995, 76 (1-2) :5-14

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