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Yamauchi, Shiro; Mitsuda, Kenro; Maeda, Hatsuo; Takai, Osamu

doi:10.1023/a:1026543510297

Cited by 5 publications

(2 citation statements)

References 4 publications

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“…The V-I measurements were carried out by stepwise varying the applied voltage. Such a test element with a reference electrode to measure the voltage difference as well as a pair of main electrodes carrying the main current was described by Yamauchi et al [4].…”

Section: Methodsmentioning

confidence: 99%

V–I characteristics of solid polymer electrolytic (SPE) dehumidifier

Sakuma¹,

Yamauchi²,

Takai

2011

J Appl Electrochem

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Measurements of the V-I characteristics of a solid polymer electrolytic (SPE) dehumidifier were done using a modified SPE dehumidifier with four electrodes which included two electrodes to carry the main current and the other two electrodes to measure the voltages applied to the electrical double layer, which are the boundary voltages between the electrodes and the SPE membrane. The measured results were analyzed using the Butler-Volmer equation to examine the validity of the measurements. The current flowing in the dehumidifier is produced by the decomposition of water near the anode. Therefore, under a steady-state condition, the current should be proportional to the supply rate of water to the anode. On the other hand, a two-layer model for the SPE dehumidifier presented in our previous article showed that the current flowing in the dehumidifier was roughly proportional to the water content in the vicinity of the anode. These results were introduced for interpretation of the V-I measurements of the SPE dehumidifier. It was concluded that the dehumidifier current was expressed in the form of a Butler-Volmer equation as a function of the electrode boundary voltages which were the voltages across the boundary between the electrodes and the SPE membrane.An experimental formula for the current under a steadystate condition was developed as a function of the water content near the anode and the boundary voltages.

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Section: Methodsmentioning

confidence: 99%

V–I characteristics of solid polymer electrolytic (SPE) dehumidifier

Sakuma¹,

Yamauchi²,

Takai

2011

J Appl Electrochem

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“…If the platinum surface is subjected to a hydrogen atmosphere and it is in contact with protons from the sulfonic acid present in the electrolyte, a stable reference signal is obtained. Two different ways to operate a reference electrode in a PEM fuel cell are reported in literature, namely the reverse hydrogen electrode (RHE) [1][2][3][4][5] and the dynamic hydrogen electrode (DHE) [6][7][8] . For a RHE, the platinum surface is flushed with hydrogen gas.…”

mentioning

confidence: 99%

The Effect of the Reference Electrode Position on the Measurement of Half Cell Polarization in Proton-Exchange Membrane Fuel Cells

Ohs

Sauter

Maass

et al. 2012

J. Electrochem. Soc.

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In this experimental and numerical study we analyze the polarization of the electrodes in a PEM fuel cell system. In order to measure the anode and cathode potential with respect to the electrolyte potential, a dynamic hydrogen electrode (DHE) is used as reference electrode. Two fundamental configurations for integrating a DHE into the membrane electrode assembly (MEA) are investigated: In the first configuration, the DHE is contacted to the membrane within a circular gap in the cathode catalyst layer, which is called edge configuration. In the second configuration, the DHE is placed between two membrane layers, which is called sandwich configuration. Differences between the reference electrode setups can be ascribed to an inhomogeneous electrolyte potential distribution close to the edge of the electrodes as described in literature. Our 2D fuel cell model as published in an earlier article is used to investigate this effect. We show that it is not possible to detect the electrode polarization by use of a reference electrode in edge configuration. By use of the sandwich configuration, the polarization of the anode and cathode half cells can be measured independently.

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