IONIC TRANSPORT IN ELECTROCHEMICAL-CELLS INCLUDING ELECTRICAL DOUBLE-LAYER EFFECTS - A NETWORK THERMODYNAMICS APPROACH

被引:51
作者
MOYA, AA [1 ]
CASTILLA, J [1 ]
HORNO, J [1 ]
机构
[1] UNIV JAEN,FAC CIENCIAS EXPTL,DEPT FIS APLICADA,E-23071 JAEN,SPAIN
关键词
D O I
10.1021/j100004a032
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 network thermodynamics approach has been used to obtain the numerical solutions of the Nernst-Planck and Poisson equations governing the ionic transport in electrochemical cells, including electrical double-layer (EDL) effects. By using the electric circuit simulation program PSPICE, a model has been proposed, which permits easily the numerical solutions of those equations describing the behavior of the system under steady-state and equilibrium conditions, as well as the transient and frequency responses to electrical perturbations. Two physical problems are studied, namely, (i) the formation of the equilibrium EDL and (ii) the transient and frequency responses of the system to electric potential perturbations. Impedance-frequency responses and the time evolution of the surface charge density on the electrodes and the electric current density are given. Also, the ionic concentration, the electric potential and the electric field profiles across the cell were obtained as a function of time. The method is quite general and extremely efficient and permits dealing with multiion systems, whatever the boundary and experimental conditions may be.
引用
收藏
页码:1292 / 1298
页数:7
相关论文
共 17 条
[1]  
Bard A., 1980, ELECTROCHEMICAL METH
[2]   TRANSMISSION-LINE EQUIVALENT-CIRCUIT MODELS FOR ELECTROCHEMICAL IMPEDANCES [J].
BRUMLEVE, TR ;
BUCK, RP .
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1981, 126 (1-3) :73-104
[3]  
BRUMLEVE TR, 1978, J ELECTROANAL CHEM, V90, P1, DOI 10.1016/S0022-0728(78)80137-5
[4]   STEADY-STATE SPACE-CHARGE EFFECTS IN SYMMETRIC CELLS WITH CONCENTRATION POLARIZED ELECTRODES [J].
BUCK, RP .
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1973, 46 (01) :1-23
[6]   NUMERICAL SOLUTION OF TIME-DEPENDENT NERNST-PLANCK EQUATIONS [J].
COHEN, H ;
COOLEY, JW .
BIOPHYSICAL JOURNAL, 1965, 5 (02) :145-&
[7]   NUMERICAL-ANALYSIS OF ELECTRICAL RESPONSE - BIASED SMALL-SIGNAL AC RESPONSE FOR SYSTEMS WITH ONE OR 2 BLOCKING ELECTRODES [J].
FRANCESCHETTI, DR ;
MACDONALD, JR .
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1979, 100 (1-2) :583-605
[8]  
FRENCH RJ, 1974, LECT NOTES BIOMATH, V2, P50
[9]   GENERALIZATION OF A FINITE-DIFFERENCE NUMERICAL-METHOD FOR THE STEADY-STATE AND TRANSIENT SOLUTIONS OF THE NERNST-PLANCK FLUX EQUATIONS [J].
GARRIDO, J ;
MAFE, S ;
PELLICER, J .
JOURNAL OF MEMBRANE SCIENCE, 1985, 24 (01) :7-14
[10]   DIGITAL-SIMULATION OF ELECTROCHEMICAL PROCESSES BY THE NETWORK APPROACH [J].
HORNO, J ;
GARCIAHERNANDEZ, MT ;
GONZALEZFERNANDEZ, CF .
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1993, 352 (1-2) :83-97