Study of Distributions of Potentials in the Horizontal Plane of a PEFC Single Cell under Fuel or Air Starvation

Mitsuda, Kenro; Nishiguchi, Hiroto

doi:10.5796/electrochemistry.78.757

Cited by 5 publications

(2 citation statements)

References 13 publications

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“…The current convergence near the fuel inlet region caused the cathode potential to reach as low as zero voltage versus RHE at the inlet. Mitsuda and Nishiguchi [51] have extended the study of Mitsuda and Murahashi [49] on PAFC to PEFC by employing four reference electrodes to measure cathode potentials. Under air starvation, they have observed uniform drops in the cathode potential, and the values were the same as the cell voltage.…”

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confidence: 99%

Dynamics of anode–cathode interaction in a polymer electrolyte fuel cell revealed by simultaneous current and potential distribution measurements under local reactant-starvation conditions

2015

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Low stoichiometry operation of fuel cells induces nonuniformities in the current generation and electrode potentials across the active electrode area. In this study, current and potential distributions are measured simultaneously in a fuel cell operating under reactant (fuel/ air)-starvation conditions. During the galvanostatic operation under local reactant starvation, the localized increase of current density is observed closer to the inlet. Here under air starvation, cathode potentials dropped uniformly across the electrode area. However, during fuel starvation, a nonuniform cathode potential profile is observed. During the potentiostatic mode of operation under air-starvation condition, cathode potentials remained uniform and constant across the electrode area. However, under fuel starvation, the cathode potential profile is influenced by the anode potential profile. Electrode-electrode interaction especially during fuel starvation is captured by simultaneous measurements of current and potential distribution.

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Section: Introductionmentioning

confidence: 99%

Dynamics of anode–cathode interaction in a polymer electrolyte fuel cell revealed by simultaneous current and potential distribution measurements under local reactant-starvation conditions

2015

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“…，固体高分子形燃料電池(燃料欠乏と空気欠乏) 19 ，電気二重層キャパシタ(端部異常腐食) 20,21 ，リチウムイオンキャパシタ(Li ドープ) 22 ，バッテリ複合型キャパシタ(電流分担) 23 ，鉛蓄電池(成層化現象) 24 などの電気化学デバイスのセル面内の電位挙動を解析し報告している． 861-871 (2016) Positive-side) と正極に対峙しない負極張り出し辺 (Jutting Negative-side) を設けたセル，Type B ( Fig. 1(B Electrochemistry, 84(11), 861-871 (2016) Fig.…”

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Polarization Study and AC-Impedance Measurement in the Horizontal Plane of a Lithium-ion Battery Using Eight Reference Electrodes

2016

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Eight reference electrodes (Li/Li + ) were embedded around a square (30 mm × 30 mm) lithium-ion battery (LIB) cell (Type A or Type B), and the electrical potential changes of the positive and negative electrodes against the reference electrodes (Rx; x-1-8) during charge and discharge were studied. Type A has a jutting positive-side (JPside) and a jutting negative-side (JN-side). During the charge and discharge of Type A, significant potential shifts (>1.3 V) in the horizontal plane of the cell were observed near the JP-side and JN-side, but which were relieved after several hours. The potential shifts in the horizontal plane of the cell (the difference between the maximum and the minimum of P-Rx (x = 1-8) or N-Rx (x = 1-8)) were caused by the relaxation current between P and JP-side or between N and JN-side. AC impedance measurements also were conducted with the cells several hours after they reached a specific SOC level. Linear relations were obtained at wide frequencies between the ratio of P-Rx (x = 1-8) and Z′ (Real) or Z′′ (Imaginary) resistance. The sharing rate of P-Rx (x = 1-8) in Z′ (Real) or Z′′ (Imaginary) resistance was mainly determined by the position of the reference electrode which was close to the edge of the positive electrode or that of the negative one. It was found that when a reference electrode is installed outside of the cell, it is difficult to divide the impedance into both electrodes by the AC impedance measurements with the reference electrode.

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Visualization of the oxygen partial pressure in a proton exchange membrane fuel cell during cell operation with low oxygen concentrations

Kakizawa

Schreiber

Takamuku

et al. 2021

Journal of Power Sources

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Study of Distributions of Potentials in the Horizontal Plane of a PEFC Single Cell under Fuel or Air Starvation

Cited by 5 publications

References 13 publications

Dynamics of anode–cathode interaction in a polymer electrolyte fuel cell revealed by simultaneous current and potential distribution measurements under local reactant-starvation conditions

Dynamics of anode–cathode interaction in a polymer electrolyte fuel cell revealed by simultaneous current and potential distribution measurements under local reactant-starvation conditions

Polarization Study and AC-Impedance Measurement in the Horizontal Plane of a Lithium-ion Battery Using Eight Reference Electrodes

Visualization of the oxygen partial pressure in a proton exchange membrane fuel cell during cell operation with low oxygen concentrations

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