Validation and evaluation of electrochemical impedance spectra of systems with states that change with time

被引：86

作者：

Schiller, CA

Richter, F

Gülzow, E

Wagner, N

机构：

[1] ZAHNER Elekt, D-96317 Kronach, Germany

[2] Siemens AG, D-91052 Erlangen, Germany

[3] DLR, German Aerosp Ctr, Inst Tech Thermodynam, D-70569 Stuttgart, Germany

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2001年 / 3卷 / 03期

关键词：

D O I：

10.1039/b007678n

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 influence of hindered water removal from a polymer electrolyte fuel cell under constant load was investigated using electrochemical impedance spectroscopy. The cathodic gas outlet of the cell was closed and impedance measurements were performed at periodic time intervals. Under the experimental conditions, the investigated system is far from steady-state conditions. It is shown that enhanced mathematical techniques are required for evaluation of the impedance data obtained. These techniques, the time course interpolation as well as the Z-HIT refinement, lead to quasi-causal spectra which are well interpreted by means of the porous electrode model.

引用

页码：374 / 378

页数：5

共 14 条

[1] Application of measurement models to impedance spectroscopy .3. Evaluation of consistency with the Kramers-Kronig relations [J].

Agarwal, P ;

Orazem, ME ;

GarciaRubio, LH .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1995, 142 (12) :4159-4168

[2]

Ehm W, 2000, ACH-MODELS CHEM, V137, P145

[3]

EHM W, UNPUB EXPANSIONS LOG

[4]

GOHR H, 1995, 46 ISE M XIAM CHIN

[5]

GOHR H, 1992, 2 INT S EL IMP SPECT

[6]

KRAMERS HA, 1929, PHYS Z, V30, P521

[7]

Kronig R. de L., 1926, J OPT SOC AM, V12, P547

[8]

MULLER B, 1998, P ELECTROCHEM SOC, V27, P187

[9]

Papoulis A., 1962, FOURIER INTEGRAL ITS

[10] 4-DIMENSIONAL ESTIMATION OF THE INSTANTANEOUS IMPEDANCE [J].

SAVOVASTOYNOV, B ;

STOYNOV, ZB .

ELECTROCHIMICA ACTA, 1992, 37 (12) :2353-2355

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