The Experts below are selected from a list of 4128 Experts worldwide ranked by ideXlab platform
Olivier Lottin - One of the best experts on this subject based on the ideXlab platform.
-
Local potential evolutions during proton exchange membrane fuel cell operation with dead ended Anode part ii aging mitigation strategies based on water management and nitrogen crossover
Journal of Power Sources, 2017Co-Authors: Sofyane Abbou, Olivier Lottin, Sophie Didierjean, Jérôme Dillet, Gaël MaranzanaAbstract:Abstract Proton exchange membrane (PEM) fuel cells operate with dead-ended Anode in order to reduce system cost and complexity when compared with hydrogen re-circulation systems. In the first part of this work, we showed that Localized fuel starvation events may occur, because of water and nitrogen accumulation in the Anode side, which could be particularly damaging to the cell performance. To prevent these degradations, the Anode compartment must be purged which may lead to an overall system efficiency decrease because of significant hydrogen waste. In the second part, we present several purge strategies in order to minimize both hydrogen waste and membrane-electrode assembly degradations during dead-ended Anode operation. A linear segmented cell with reference electrodes was used to monitor simultaneously the current density distribution along the gas channel and the time evolution of Local Anode and cathode potentials. To asses MEA damages, Platinum ElectroChemical Surface Area (ECSA) and cell performance were periodically measured. The results showed that dead-end mode operation with an Anode plate maintained at a temperature 5 °C hotter than the cathode plate limits water accumulation in the Anode side, reducing significantly purge frequency (and thus hydrogen losses) as well as MEA damages. As nitrogen contribution to hydrogen starvation is predominant in this thermal configuration, we also tested a microleakage solution to discharge continuously most the nitrogen accumulating in the Anode side while ensuring low hydrogen losses and minimum ECSA losses provided the right microleakage flow rate is chosen.
-
Time Evolution of Local Potentials During PEM Fuel Cell Operation With Dead-Ended Anode
ECS Transactions, 2013Co-Authors: Sofyane Abbou, Sophie Didierjean, Jérôme Dillet, Gaël Maranzana, Dusan Spernjak, Rangachary Mukundan, Joseph D. Fairweather, Rod L. Borup, Olivier LottinAbstract:We present experimental results obtained with a 2D segmented cell with reference electrodes along the gas channels, used to record Local Anode and cathode potentials. Aging protocols consisting of repeated dead-end operation sequences were performed to assess the impact of hydrogen starvation on the Local fuel cell performance. We observed strong Local cathode potential excursion, as well as non-uniform ECSA losses and performance degradation along the cell area. The damage was more pronounced in the regions suffering the longest from fuel starvation: i.e. close to the exit of the Anode compartment.
Sofyane Abbou - One of the best experts on this subject based on the ideXlab platform.
-
Local potential evolutions during proton exchange membrane fuel cell operation with dead ended Anode part ii aging mitigation strategies based on water management and nitrogen crossover
Journal of Power Sources, 2017Co-Authors: Sofyane Abbou, Olivier Lottin, Sophie Didierjean, Jérôme Dillet, Gaël MaranzanaAbstract:Abstract Proton exchange membrane (PEM) fuel cells operate with dead-ended Anode in order to reduce system cost and complexity when compared with hydrogen re-circulation systems. In the first part of this work, we showed that Localized fuel starvation events may occur, because of water and nitrogen accumulation in the Anode side, which could be particularly damaging to the cell performance. To prevent these degradations, the Anode compartment must be purged which may lead to an overall system efficiency decrease because of significant hydrogen waste. In the second part, we present several purge strategies in order to minimize both hydrogen waste and membrane-electrode assembly degradations during dead-ended Anode operation. A linear segmented cell with reference electrodes was used to monitor simultaneously the current density distribution along the gas channel and the time evolution of Local Anode and cathode potentials. To asses MEA damages, Platinum ElectroChemical Surface Area (ECSA) and cell performance were periodically measured. The results showed that dead-end mode operation with an Anode plate maintained at a temperature 5 °C hotter than the cathode plate limits water accumulation in the Anode side, reducing significantly purge frequency (and thus hydrogen losses) as well as MEA damages. As nitrogen contribution to hydrogen starvation is predominant in this thermal configuration, we also tested a microleakage solution to discharge continuously most the nitrogen accumulating in the Anode side while ensuring low hydrogen losses and minimum ECSA losses provided the right microleakage flow rate is chosen.
-
Time Evolution of Local Potentials During PEM Fuel Cell Operation With Dead-Ended Anode
ECS Transactions, 2013Co-Authors: Sofyane Abbou, Sophie Didierjean, Jérôme Dillet, Gaël Maranzana, Dusan Spernjak, Rangachary Mukundan, Joseph D. Fairweather, Rod L. Borup, Olivier LottinAbstract:We present experimental results obtained with a 2D segmented cell with reference electrodes along the gas channels, used to record Local Anode and cathode potentials. Aging protocols consisting of repeated dead-end operation sequences were performed to assess the impact of hydrogen starvation on the Local fuel cell performance. We observed strong Local cathode potential excursion, as well as non-uniform ECSA losses and performance degradation along the cell area. The damage was more pronounced in the regions suffering the longest from fuel starvation: i.e. close to the exit of the Anode compartment.
Sophie Didierjean - One of the best experts on this subject based on the ideXlab platform.
-
Local potential evolutions during proton exchange membrane fuel cell operation with dead ended Anode part ii aging mitigation strategies based on water management and nitrogen crossover
Journal of Power Sources, 2017Co-Authors: Sofyane Abbou, Olivier Lottin, Sophie Didierjean, Jérôme Dillet, Gaël MaranzanaAbstract:Abstract Proton exchange membrane (PEM) fuel cells operate with dead-ended Anode in order to reduce system cost and complexity when compared with hydrogen re-circulation systems. In the first part of this work, we showed that Localized fuel starvation events may occur, because of water and nitrogen accumulation in the Anode side, which could be particularly damaging to the cell performance. To prevent these degradations, the Anode compartment must be purged which may lead to an overall system efficiency decrease because of significant hydrogen waste. In the second part, we present several purge strategies in order to minimize both hydrogen waste and membrane-electrode assembly degradations during dead-ended Anode operation. A linear segmented cell with reference electrodes was used to monitor simultaneously the current density distribution along the gas channel and the time evolution of Local Anode and cathode potentials. To asses MEA damages, Platinum ElectroChemical Surface Area (ECSA) and cell performance were periodically measured. The results showed that dead-end mode operation with an Anode plate maintained at a temperature 5 °C hotter than the cathode plate limits water accumulation in the Anode side, reducing significantly purge frequency (and thus hydrogen losses) as well as MEA damages. As nitrogen contribution to hydrogen starvation is predominant in this thermal configuration, we also tested a microleakage solution to discharge continuously most the nitrogen accumulating in the Anode side while ensuring low hydrogen losses and minimum ECSA losses provided the right microleakage flow rate is chosen.
-
Time Evolution of Local Potentials During PEM Fuel Cell Operation With Dead-Ended Anode
ECS Transactions, 2013Co-Authors: Sofyane Abbou, Sophie Didierjean, Jérôme Dillet, Gaël Maranzana, Dusan Spernjak, Rangachary Mukundan, Joseph D. Fairweather, Rod L. Borup, Olivier LottinAbstract:We present experimental results obtained with a 2D segmented cell with reference electrodes along the gas channels, used to record Local Anode and cathode potentials. Aging protocols consisting of repeated dead-end operation sequences were performed to assess the impact of hydrogen starvation on the Local fuel cell performance. We observed strong Local cathode potential excursion, as well as non-uniform ECSA losses and performance degradation along the cell area. The damage was more pronounced in the regions suffering the longest from fuel starvation: i.e. close to the exit of the Anode compartment.
Jérôme Dillet - One of the best experts on this subject based on the ideXlab platform.
-
Local potential evolutions during proton exchange membrane fuel cell operation with dead ended Anode part ii aging mitigation strategies based on water management and nitrogen crossover
Journal of Power Sources, 2017Co-Authors: Sofyane Abbou, Olivier Lottin, Sophie Didierjean, Jérôme Dillet, Gaël MaranzanaAbstract:Abstract Proton exchange membrane (PEM) fuel cells operate with dead-ended Anode in order to reduce system cost and complexity when compared with hydrogen re-circulation systems. In the first part of this work, we showed that Localized fuel starvation events may occur, because of water and nitrogen accumulation in the Anode side, which could be particularly damaging to the cell performance. To prevent these degradations, the Anode compartment must be purged which may lead to an overall system efficiency decrease because of significant hydrogen waste. In the second part, we present several purge strategies in order to minimize both hydrogen waste and membrane-electrode assembly degradations during dead-ended Anode operation. A linear segmented cell with reference electrodes was used to monitor simultaneously the current density distribution along the gas channel and the time evolution of Local Anode and cathode potentials. To asses MEA damages, Platinum ElectroChemical Surface Area (ECSA) and cell performance were periodically measured. The results showed that dead-end mode operation with an Anode plate maintained at a temperature 5 °C hotter than the cathode plate limits water accumulation in the Anode side, reducing significantly purge frequency (and thus hydrogen losses) as well as MEA damages. As nitrogen contribution to hydrogen starvation is predominant in this thermal configuration, we also tested a microleakage solution to discharge continuously most the nitrogen accumulating in the Anode side while ensuring low hydrogen losses and minimum ECSA losses provided the right microleakage flow rate is chosen.
-
Time Evolution of Local Potentials During PEM Fuel Cell Operation With Dead-Ended Anode
ECS Transactions, 2013Co-Authors: Sofyane Abbou, Sophie Didierjean, Jérôme Dillet, Gaël Maranzana, Dusan Spernjak, Rangachary Mukundan, Joseph D. Fairweather, Rod L. Borup, Olivier LottinAbstract:We present experimental results obtained with a 2D segmented cell with reference electrodes along the gas channels, used to record Local Anode and cathode potentials. Aging protocols consisting of repeated dead-end operation sequences were performed to assess the impact of hydrogen starvation on the Local fuel cell performance. We observed strong Local cathode potential excursion, as well as non-uniform ECSA losses and performance degradation along the cell area. The damage was more pronounced in the regions suffering the longest from fuel starvation: i.e. close to the exit of the Anode compartment.
Gaël Maranzana - One of the best experts on this subject based on the ideXlab platform.
-
Local potential evolutions during proton exchange membrane fuel cell operation with dead ended Anode part ii aging mitigation strategies based on water management and nitrogen crossover
Journal of Power Sources, 2017Co-Authors: Sofyane Abbou, Olivier Lottin, Sophie Didierjean, Jérôme Dillet, Gaël MaranzanaAbstract:Abstract Proton exchange membrane (PEM) fuel cells operate with dead-ended Anode in order to reduce system cost and complexity when compared with hydrogen re-circulation systems. In the first part of this work, we showed that Localized fuel starvation events may occur, because of water and nitrogen accumulation in the Anode side, which could be particularly damaging to the cell performance. To prevent these degradations, the Anode compartment must be purged which may lead to an overall system efficiency decrease because of significant hydrogen waste. In the second part, we present several purge strategies in order to minimize both hydrogen waste and membrane-electrode assembly degradations during dead-ended Anode operation. A linear segmented cell with reference electrodes was used to monitor simultaneously the current density distribution along the gas channel and the time evolution of Local Anode and cathode potentials. To asses MEA damages, Platinum ElectroChemical Surface Area (ECSA) and cell performance were periodically measured. The results showed that dead-end mode operation with an Anode plate maintained at a temperature 5 °C hotter than the cathode plate limits water accumulation in the Anode side, reducing significantly purge frequency (and thus hydrogen losses) as well as MEA damages. As nitrogen contribution to hydrogen starvation is predominant in this thermal configuration, we also tested a microleakage solution to discharge continuously most the nitrogen accumulating in the Anode side while ensuring low hydrogen losses and minimum ECSA losses provided the right microleakage flow rate is chosen.
-
Time Evolution of Local Potentials During PEM Fuel Cell Operation With Dead-Ended Anode
ECS Transactions, 2013Co-Authors: Sofyane Abbou, Sophie Didierjean, Jérôme Dillet, Gaël Maranzana, Dusan Spernjak, Rangachary Mukundan, Joseph D. Fairweather, Rod L. Borup, Olivier LottinAbstract:We present experimental results obtained with a 2D segmented cell with reference electrodes along the gas channels, used to record Local Anode and cathode potentials. Aging protocols consisting of repeated dead-end operation sequences were performed to assess the impact of hydrogen starvation on the Local fuel cell performance. We observed strong Local cathode potential excursion, as well as non-uniform ECSA losses and performance degradation along the cell area. The damage was more pronounced in the regions suffering the longest from fuel starvation: i.e. close to the exit of the Anode compartment.