Electrochemical noise of a hydrogen-air polymer electrolyte fuel cell operating at different loads

Astafev, E. A.; Ukshe, A. E.; Герасимова, Е. В.; Dobrovolsky, Yu. A.; Manzhos, R. A.

doi:10.1007/s10008-018-3892-4

Cited by 30 publications

(10 citation statements)

References 43 publications

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“…All voltage fluctuations observed under such conditions were the fuel cell sub low frequency ECN noise and we tried to investigate them in current work. The same ideas of trend elimination were successfully used in all or previous works [16,21,27,29,30], the only difference is in frequency band of the current work.…”

Section: Methodsmentioning

confidence: 99%

“…The only difference was in choosing the length of subsegments and those averaging amount, which depended on the experiment type (ECN data array of 30,000 points was divided into several subsegments to calculate PSD for each of them and then average was performed to obtain final PSD). Linear trend removal procedure was individually applied to each segment, as it was successfully used in our previous works , , . Other types of detrending procedures were used before , but this one was shown to be the most appropriate one.…”

Section: Methodsmentioning

confidence: 99%

“…Typical kinds of distortion of any frequency dependence are resonances and amplitude raise or fall deviations. All of them are shown to be present in fuel cells . One of the main parameters in such investigations is frequency band wideness.…”

Section: Introductionmentioning

confidence: 99%

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Frequency Characteristics of Hydrogen‐Air Fuel Cell Electrochemical Noise

Astafev

2018

Fuel Cells

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Electrochemical noise (ECN) of operating polymer membrane hydrogen‐air fuel cell was measured in a wide frequency band. Spectral power densities of the noise were calculated to consider its frequency characteristics. Air flow speed on the cathode side was sinusoidal modulated to investigate the response of fuel cell noise to external conditions changing. It was shown that properly operated fuel cell does not possess self‐resonance or peaks in electrochemical noise frequency dependence.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Frequency Characteristics of Hydrogen‐Air Fuel Cell Electrochemical Noise

Astafev

2018

Fuel Cells

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“…In this work the carbon nanotubes were used as working electrodes in the hydrogen gas electrosynthesis. Carbon nanotubes have been studied by scientists because they represent a great revolution thanks to its dimensions, its lightness and its extraordinary electrical, mechanical and thermal properties that surpass those of any previously known material [8,10].…”

Section: Introductionmentioning

confidence: 99%

Utilization of carbon nanotubes in hydrogen electrosynthesis from tropical fruit fermentation

Lopes¹,

Abreu²

2020

Matéria (Rio J.)

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The use of fossil fuels, especially oil and gas, has accelerated in recent years, resulting in the global energy crisis. The fermentative biological process is a sustainable way to produce hydrogen, as it can use as a substrate various types of carbohydrate-rich industrial and household waste such as fruit, minimizing but not completely eliminating the problems caused by improper disposal of this material. From a perspective of energy conservation and use of renewable sources for energy generation, this work aims to contribute to the identification of the use of a currently unused portion of energy, optimizing hydrogen production from a fuel cell. microbial. The main nanomaterial used in electrolysis was carbon nanotubes (CNT) incorporated into carbon felt (CF). Cyclic voltammetry studies were also performed on three electrode systems: vitreous carbon electrode as working electrode, platinum electrode as auxiliary electrode and Ag / AgCl / Cl- as reference electrode. An electrochemical cell formed by two separate compartments was constructed. Before starting the electrolysis experiment, an experimental design was performed using the complete factorial design technique to analyze the influence of the variables selected for this study. The independent variables selected were: Tropical fruit liquor concentration in %v/v, type of working electrode, electrolysis time and pH of the electrolyte medium. The observed variable was the concentration in% v / v of the hydrogen gas obtained in the electrolysis. After the results of the tests, it was concluded that carbon nanotubes can be used as working electrode, presenting success in the hydrogen production process and that the pH of the electrolytic medium has a strong influence on this process. The present work was concluded presenting an alternative way in the production of a renewable energy source.

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“…A third category is based on the results that are achieved using electrochemical techniques such as electrochemical impedance spectroscopy, current interruption, galvanostatic method, polarization curve, and so forth [44][45][46]. Other approaches have also been proposed, for instance, those using some micro sensors [16,[47][48][49][50][51], or those using fast Fourier transform [34,[52][53][54][55], wavelet transform [56][57][58], statistical methods and neural networks [59].…”

Section: Introductionmentioning

confidence: 99%

Statistical Short Time Analysis for Proton Exchange Membrane Fuel Cell Diagnostic‐Application to Water Management

et al. 2019

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High frequency concomitant voltage and pressure measurements on a single proton exchange membrane fuel cell are presented in this paper. Voltage, anodic and cathodic pressure measurements were shown to be highly sensitive to gas relative humidity and temperature of the cell. Fast voltage dips corresponding to pressure spikes at the anode were observed and indicate a flooding occurrence due to the blockage of anode inlet by liquid water. In a generalize flooding of the cell, pressure drop fluctuations are easily recognizable and result in voltage fluctuations and drift. A methodology based on short‐time analysis on both, voltage and pressure signals, is used to quantify the effects of flooding and drying within proton exchange membrane fuel cell (PEMFC) systems. Intermittent behavior is highlighted on the standard deviation of the voltage for flooding and drying cases. Simultaneous analysis of the standard deviation short‐time for voltage and pressure signals allows for the differentiation between flooding and drying cases. Concomitant pressure and voltage fluctuations can be easily detected and monitored for a reliable diagnostic of proton exchange membrane fuel cell systems.

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Electrochemical noise of a hydrogen-air polymer electrolyte fuel cell operating at different loads

Cited by 30 publications

References 43 publications

Frequency Characteristics of Hydrogen‐Air Fuel Cell Electrochemical Noise

Frequency Characteristics of Hydrogen‐Air Fuel Cell Electrochemical Noise

Utilization of carbon nanotubes in hydrogen electrosynthesis from tropical fruit fermentation

Statistical Short Time Analysis for Proton Exchange Membrane Fuel Cell Diagnostic‐Application to Water Management

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