Electrochemical impedance characterization of porous metal hydride electrodes

被引：28

作者：

Castro, EB ^{[1
]}

Real, SG ^{[1
]}

Bonesi, A ^{[1
]}

Visintin, A ^{[1
]}

Triaca, WE ^{[1
]}

机构：

[1] Natl Univ La Plata, Inst Invest Fisicoquim Teor & Aplicadas, RA-1900 La Plata, Argentina

来源：

ELECTROCHIMICA ACTA | 2004年 / 49卷 / 22-23期

关键词：

metal hydride electrodes; electrochemical impedance spectroscopy; porous electrodes; rechargeable batteries; parametric identification;

D O I：

10.1016/j.electacta.2004.01.087

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

An electrochemical impedance characterization of hydride electrodes at different states of discharge (SOD) is presented. A physicochemical model is developed in order to simulate impedance data. The impedance function derived from the model takes into account the porous nature of the electrode material considering a finite conductivity for both the solid and liquid phases. The hydrogen absorption/desorption processes, taking place at the walls of spherical alloy particles of average size, are described in terms of a kinetic scheme for hydrogen adsorption coupled to hydrogen diffusion into the electrode material. The state of discharge of the electrode is related to the boundary conditions necessary to solve the transport equations. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：3879 / 3890

页数：12

共 21 条

[1] Influence of the alloy morphology on the kinetics of AB5-type metal hydride electrodes [J].

Chartouni, D ;

Kuriyama, N ;

Otto, A ;

Güther, V ;

Nützenadel, C ;

Züttel, A ;

Schlapbach, L .

JOURNAL OF ALLOYS AND COMPOUNDS, 1999, 285 (1-2) :292-297

[2]

Crank J., 1964, MATH DIFFUSION, P84

[3]

de Levie R, 1967, Advances in Electrochemical Science and Engineering, P329

[4] An electrochemical impedance study of hydrogen evolution and absorption on Sn-modified steel electrodes [J].

Dick, LFP ;

Lisboa, MB ;

Castro, EB .

JOURNAL OF APPLIED ELECTROCHEMISTRY, 2002, 32 (08) :883-889

[5] EFFECT OF THE STOICHIOMETRIC RATIO ON ELECTROCHEMICAL PROPERTIES OF HYDROGEN STORAGE ALLOYS FOR NICKEL-METAL HYDRIDE BATTERIES [J].

FUKUMOTO, Y ;

MIYAMOTO, M ;

MATSUOKA, M ;

IWAKURA, C .

ELECTROCHIMICA ACTA, 1995, 40 (07) :845-848

[6]

FULLER TH, 1993, MOD ASPECT ELECTROC, V27, P359

[7] DIFFUSION IMPEDANCE IN PLANAR, CYLINDRICAL AND SPHERICAL-SYMMETRY [J].

JACOBSEN, T ;

WEST, K .

ELECTROCHIMICA ACTA, 1995, 40 (02) :255-262

[8] GENERAL-MODEL OF ELECTROCHEMICAL HYDROGEN ABSORPTION INTO METALS [J].

LASIA, A ;

GREGOIRE, D .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1995, 142 (10) :3393-3399

[9] Kinetic study of a porous metal hydride electrode [J].

Lundqvist, A ;

Lindbergh, G .

ELECTROCHIMICA ACTA, 1999, 44 (15) :2523-2542

[10] The impedance response of a porous electrode composed of intercalation particles [J].

Meyers, JP ;

Doyle, M ;

Darling, RM ;

Newman, J .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2000, 147 (08) :2930-2940

← 1 2 3 →