In Operando Neutron Radiography Analysis of a High-Temperature Polymer Electrolyte Fuel Cell Based on a Phosphoric Acid-Doped Polybenzimidazole Membrane Using the Hydrogen-Deuterium Contrast Method
In order to characterize high temperature polymer electrolyte fuel cells (HT-PEFCs) in operando, neutron radiography imaging, in combination with the deuterium contrast method, was used to analyze the hydrogen distribution and proton exchange processes in operando. These measurements were then combi...
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| Format: | Article |
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MDPI AG
2018-08-01
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| Series: | Energies |
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| Online Access: | http://www.mdpi.com/1996-1073/11/9/2214 |
| _version_ | 1798039071610634240 |
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| author | Yu Lin Tobias Arlt Nikolay Kardjilov Ingo Manke Werner Lehnert |
| author_facet | Yu Lin Tobias Arlt Nikolay Kardjilov Ingo Manke Werner Lehnert |
| author_sort | Yu Lin |
| collection | DOAJ |
| description | In order to characterize high temperature polymer electrolyte fuel cells (HT-PEFCs) in operando, neutron radiography imaging, in combination with the deuterium contrast method, was used to analyze the hydrogen distribution and proton exchange processes in operando. These measurements were then combined with the electrochemical impedance spectroscopy measurements. The cell was operated under different current densities and stoichiometries. Neutron images of the active area of the cell were captured in order to study the changeover times when the fuel supply was switched between hydrogen and deuterium, as well as to analyze the cell during steady state conditions. This work demonstrates that the changeover from proton to deuteron (and vice versa) leads to local varying media distributions in the electrolyte, independent of the overall exchange dynamics. A faster proton-to-deuteron exchange was re-discovered when switching the gas supply from H2 to D2 than that from D2 to H2. Furthermore, the D2 uptake and discharge were faster at a higher current density. Specifically, the changeover from H to D takes 5–6 min at 200 mA cm−2, 2–3 min at 400 mA cm−2 and 1–2 min at 600 mA cm−2. An effect on the transmittance changes is apparent when the stoichiometry changes. |
| first_indexed | 2024-04-11T21:48:51Z |
| format | Article |
| id | doaj.art-b6b7743c95464b37abd54e8f1cd3da32 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-11T21:48:51Z |
| publishDate | 2018-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-b6b7743c95464b37abd54e8f1cd3da322022-12-22T04:01:19ZengMDPI AGEnergies1996-10732018-08-01119221410.3390/en11092214en11092214In Operando Neutron Radiography Analysis of a High-Temperature Polymer Electrolyte Fuel Cell Based on a Phosphoric Acid-Doped Polybenzimidazole Membrane Using the Hydrogen-Deuterium Contrast MethodYu Lin0Tobias Arlt1Nikolay Kardjilov2Ingo Manke3Werner Lehnert4IEK-3: Electrochemical Process Engineering, Institute of Energy and Climate Research, Forschungszentrum Jülich GmbH, 52425 Jülich, GermanyInstitute of Materials Science and Technologies, Technische Universität Berlin, Hardenbergstr, 36, 10623 Berlin, GermanyInstitute of Applied Materials, Helmholtz-Zentrum Berlin GmbH, Hahn-Meitner-Platz 1, 14109 Berlin, GermanyInstitute of Applied Materials, Helmholtz-Zentrum Berlin GmbH, Hahn-Meitner-Platz 1, 14109 Berlin, GermanyIEK-3: Electrochemical Process Engineering, Institute of Energy and Climate Research, Forschungszentrum Jülich GmbH, 52425 Jülich, GermanyIn order to characterize high temperature polymer electrolyte fuel cells (HT-PEFCs) in operando, neutron radiography imaging, in combination with the deuterium contrast method, was used to analyze the hydrogen distribution and proton exchange processes in operando. These measurements were then combined with the electrochemical impedance spectroscopy measurements. The cell was operated under different current densities and stoichiometries. Neutron images of the active area of the cell were captured in order to study the changeover times when the fuel supply was switched between hydrogen and deuterium, as well as to analyze the cell during steady state conditions. This work demonstrates that the changeover from proton to deuteron (and vice versa) leads to local varying media distributions in the electrolyte, independent of the overall exchange dynamics. A faster proton-to-deuteron exchange was re-discovered when switching the gas supply from H2 to D2 than that from D2 to H2. Furthermore, the D2 uptake and discharge were faster at a higher current density. Specifically, the changeover from H to D takes 5–6 min at 200 mA cm−2, 2–3 min at 400 mA cm−2 and 1–2 min at 600 mA cm−2. An effect on the transmittance changes is apparent when the stoichiometry changes.http://www.mdpi.com/1996-1073/11/9/2214neutron radiographyoperandopolymer electrolyte fuel cellphosphoric acid doped polybenzimidazole membranehydrogen-deuterium contrast method |
| spellingShingle | Yu Lin Tobias Arlt Nikolay Kardjilov Ingo Manke Werner Lehnert In Operando Neutron Radiography Analysis of a High-Temperature Polymer Electrolyte Fuel Cell Based on a Phosphoric Acid-Doped Polybenzimidazole Membrane Using the Hydrogen-Deuterium Contrast Method Energies neutron radiography operando polymer electrolyte fuel cell phosphoric acid doped polybenzimidazole membrane hydrogen-deuterium contrast method |
| title | In Operando Neutron Radiography Analysis of a High-Temperature Polymer Electrolyte Fuel Cell Based on a Phosphoric Acid-Doped Polybenzimidazole Membrane Using the Hydrogen-Deuterium Contrast Method |
| title_full | In Operando Neutron Radiography Analysis of a High-Temperature Polymer Electrolyte Fuel Cell Based on a Phosphoric Acid-Doped Polybenzimidazole Membrane Using the Hydrogen-Deuterium Contrast Method |
| title_fullStr | In Operando Neutron Radiography Analysis of a High-Temperature Polymer Electrolyte Fuel Cell Based on a Phosphoric Acid-Doped Polybenzimidazole Membrane Using the Hydrogen-Deuterium Contrast Method |
| title_full_unstemmed | In Operando Neutron Radiography Analysis of a High-Temperature Polymer Electrolyte Fuel Cell Based on a Phosphoric Acid-Doped Polybenzimidazole Membrane Using the Hydrogen-Deuterium Contrast Method |
| title_short | In Operando Neutron Radiography Analysis of a High-Temperature Polymer Electrolyte Fuel Cell Based on a Phosphoric Acid-Doped Polybenzimidazole Membrane Using the Hydrogen-Deuterium Contrast Method |
| title_sort | in operando neutron radiography analysis of a high temperature polymer electrolyte fuel cell based on a phosphoric acid doped polybenzimidazole membrane using the hydrogen deuterium contrast method |
| topic | neutron radiography operando polymer electrolyte fuel cell phosphoric acid doped polybenzimidazole membrane hydrogen-deuterium contrast method |
| url | http://www.mdpi.com/1996-1073/11/9/2214 |
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