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Titolo:
IONIC TRANSPORT IN ELECTROCHEMICAL-CELLS INCLUDING ELECTRICAL DOUBLE-LAYER EFFECTS - A NETWORK THERMODYNAMICS APPROACH
Autore:
MOYA AA; CASTILLA J; HORNO J;
Indirizzi:
UNIV JAEN,FAC CIENCIAS EXPTL,DEPT FIS APLICADA,PARAJE LAS LAGUNILLAS S-N E-23071 JAEN SPAIN UNIV JAEN,FAC CIENCIAS EXPTL,DEPT FIS APLICADA E-23071 JAEN SPAIN
Titolo Testata:
Journal of physical chemistry
fascicolo: 4, volume: 99, anno: 1995,
pagine: 1292 - 1298
SICI:
0022-3654(1995)99:4<1292:ITIEIE>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
NERNST-PLANCK; STEADY-STATE; SIMULATION; EQUATIONS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
17
Recensione:
Indirizzi per estratti:
Citazione:
A.A. Moya et al., "IONIC TRANSPORT IN ELECTROCHEMICAL-CELLS INCLUDING ELECTRICAL DOUBLE-LAYER EFFECTS - A NETWORK THERMODYNAMICS APPROACH", Journal of physical chemistry, 99(4), 1995, pp. 1292-1298

Abstract

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 transientand 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 electricpotential 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.

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Documento generato il 11/07/20 alle ore 04:46:11