The Experts below are selected from a list of 12 Experts worldwide ranked by ideXlab platform
Michael J Aziz - One of the best experts on this subject based on the ideXlab platform.
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a high power density high efficiency Hydrogen chlorine regenerative fuel cell with a low precious metal content catalyst
Energy and Environmental Science, 2012Co-Authors: Brian Huskinson, Jason Rugolo, Sujit Kumar Mondal, Michael J AzizAbstract:We report the performance of a Hydrogen–chlorine electrochemical cell with a chlorine electrode employing a low precious metal content alloy oxide electrocatalyst for the chlorine electrode: (Ru0.09Co0.91)3O4. The cell employs a commercial Hydrogen fuel cell electrode and transports protons through a Nafion membrane in both galvanic and electrolytic mode. The peak galvanic power density exceeds 1 W cm−2, which is twice previous literature values. The precious metal loading of the chlorine electrode is below 0.15 mg Ru cm−2. Virtually no activation losses are observed, allowing the cell to run at nearly 0.4 W cm−2 at 90% voltage efficiency. We report the effects of fluid pressure, electrolyte acid concentration, and Hydrogen-Side humidification on overall cell performance and efficiency. A comparison of our results to the model of Rugolo et al. [Rugolo et al., J. Electrochem. Soc., 2012, 159, B133] points out directions for further performance enhancement. The performance reported here gives these devices promise for applications in carbon sequestration and grid-scale electrical energy storage.
Brian Huskinson - One of the best experts on this subject based on the ideXlab platform.
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a high power density high efficiency Hydrogen chlorine regenerative fuel cell with a low precious metal content catalyst
Energy and Environmental Science, 2012Co-Authors: Brian Huskinson, Jason Rugolo, Sujit Kumar Mondal, Michael J AzizAbstract:We report the performance of a Hydrogen–chlorine electrochemical cell with a chlorine electrode employing a low precious metal content alloy oxide electrocatalyst for the chlorine electrode: (Ru0.09Co0.91)3O4. The cell employs a commercial Hydrogen fuel cell electrode and transports protons through a Nafion membrane in both galvanic and electrolytic mode. The peak galvanic power density exceeds 1 W cm−2, which is twice previous literature values. The precious metal loading of the chlorine electrode is below 0.15 mg Ru cm−2. Virtually no activation losses are observed, allowing the cell to run at nearly 0.4 W cm−2 at 90% voltage efficiency. We report the effects of fluid pressure, electrolyte acid concentration, and Hydrogen-Side humidification on overall cell performance and efficiency. A comparison of our results to the model of Rugolo et al. [Rugolo et al., J. Electrochem. Soc., 2012, 159, B133] points out directions for further performance enhancement. The performance reported here gives these devices promise for applications in carbon sequestration and grid-scale electrical energy storage.
Sato Motohiko - One of the best experts on this subject based on the ideXlab platform.
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cell for water electrolysis fuel cell power generation and cell stack body having a plurality of same cells stacked
2018Co-Authors: Sone Yoshitsugu, Matsumoto Hiroshige, Terayama Yuki, Haji Takamasa, Sasamori Riichi, Sato MotohikoAbstract:The present invention addresses the problem of providing a cell for water electrolysis/fuel cell power generation which is switchable between a water electrolysis mode and a fuel cell power generation mode, and, when switching from one mode to the other, is operational immediately in the mode after the switch. The present invention relates to the cell for water electrolysis/fuel cell power generation comprising, in a first direction substantially perpendicular to the cell stacking direction, a flow path for supplying or discharging water, in a second direction substantially perpendicular to the cell stacking direction, an oxygen-containing flow path for discharging or supplying an oxygen-containing gas, and, in a third direction substantially perpendicular to the cell stacking direction, a Hydrogen-containing gas flow path for discharging or supplying a Hydrogen-containing gas, wherein an oxygen-Side electrode layer and a Hydrogen-Side electrode layer are water-repellent electrode layers.
Fang Ye - One of the best experts on this subject based on the ideXlab platform.
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numerical study of the dynamic response of heat and mass transfer to operation mode switching of a unitized regenerative fuel cell
Energies, 2016Co-Authors: Hong Xiao, Hang Guo, Fang YeAbstract:Knowledge concerning the complicated changes of mass and heat transfer is desired to improve the performance and durability of unitized regenerative fuel cells (URFCs). In this study, a transient, non-isothermal, single-phase, and multi-physics mathematical model for a URFC based on the proton exchange membrane is generated to investigate transient responses in the process of operation mode switching from fuel cell (FC) to electrolysis cell (EC). Various heat generation mechanisms, including Joule heat, reaction heat, and the heat attributed to activation polarizations, have been conSidered in the transient model coupled with electrochemical reaction and mass transfer in porous electrodes. The polarization curves of the steady-state models are validated by experimental data in the literatures. Numerical results reveal that current density, gas mass fractions, and temperature suddenly change with the sudden change of operating voltage in the mode switching process. The response time of temperature is longer than that of current density and gas mass fractions. In both FC and EC modes, the cell temperature and gradient of gas mass fraction in the oxygen Side are larger than that in the Hydrogen Side. The temperature difference of the entire cell is less than 1.5 K. The highest temperature appears at oxygen-Side catalyst layer under the FC mode and at membrane under a more stable EC mode. The cell is exothermic all the time. These dynamic responses and phenomena have important implications for heat analysis and provide proven guidelines for the improvement of URFCs mode switching.
Sujit Kumar Mondal - One of the best experts on this subject based on the ideXlab platform.
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a high power density high efficiency Hydrogen chlorine regenerative fuel cell with a low precious metal content catalyst
Energy and Environmental Science, 2012Co-Authors: Brian Huskinson, Jason Rugolo, Sujit Kumar Mondal, Michael J AzizAbstract:We report the performance of a Hydrogen–chlorine electrochemical cell with a chlorine electrode employing a low precious metal content alloy oxide electrocatalyst for the chlorine electrode: (Ru0.09Co0.91)3O4. The cell employs a commercial Hydrogen fuel cell electrode and transports protons through a Nafion membrane in both galvanic and electrolytic mode. The peak galvanic power density exceeds 1 W cm−2, which is twice previous literature values. The precious metal loading of the chlorine electrode is below 0.15 mg Ru cm−2. Virtually no activation losses are observed, allowing the cell to run at nearly 0.4 W cm−2 at 90% voltage efficiency. We report the effects of fluid pressure, electrolyte acid concentration, and Hydrogen-Side humidification on overall cell performance and efficiency. A comparison of our results to the model of Rugolo et al. [Rugolo et al., J. Electrochem. Soc., 2012, 159, B133] points out directions for further performance enhancement. The performance reported here gives these devices promise for applications in carbon sequestration and grid-scale electrical energy storage.
