A Diagnostic Method for a Multi-Connected PEM-type Electrolysis System by Current Sweeping
Water electrolysis is a power-to-gas technology that can be used to decrease the effect of global warming. To reduce its overall cost, we have designed a water electrolysis system containing serially connected water electrolyzers that reduce the site area and increase energy efficiency. One of the i...
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| Format: | Article |
| Language: | English |
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The Electrochemical Society of Japan
2025-01-01
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| Series: | Electrochemistry |
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| Online Access: | https://www.jstage.jst.go.jp/article/electrochemistry/93/1/93_24-00107/_html/-char/en |
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| author | Jiachen GE Shinji FUJITA Akira GUNJI Motoyuki HIROOKA Masatoshi SUGIMASA Hiromu KAKUYA |
| author_facet | Jiachen GE Shinji FUJITA Akira GUNJI Motoyuki HIROOKA Masatoshi SUGIMASA Hiromu KAKUYA |
| author_sort | Jiachen GE |
| collection | DOAJ |
| description | Water electrolysis is a power-to-gas technology that can be used to decrease the effect of global warming. To reduce its overall cost, we have designed a water electrolysis system containing serially connected water electrolyzers that reduce the site area and increase energy efficiency. One of the issues remaining to be solved is to develop a method that can diagnose the degradation state of the water electrolyzer during operation without significantly changing the current supply. In this study, a diagnostic method, named the sweep method, was developed. A typical procedure of this method is described as follows. A linear sweeping current is applied to the multi-connected water electrolysis system. Then, swept current and response voltage measurements are collected and subjected to linear and nonlinear regression based on an equivalent circuit, -R0-(R1, C1)-, to obtain its circuit parameters. The electrical resistance R0 is elected as the evaluation criteria of the degradation, and the diagnostic results of sweep method are found to be close to those of an impedance analysis. As the method can be conducted without a significant current change, we believe that it can be applied to a large-scale water electrolysis system. |
| format | Article |
| id | doaj-art-a78244632f4e4f5a9a452b1a84e76263 |
| institution | Kabale University |
| issn | 2186-2451 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | The Electrochemical Society of Japan |
| record_format | Article |
| series | Electrochemistry |
| spelling | doaj-art-a78244632f4e4f5a9a452b1a84e762632025-01-23T01:11:02ZengThe Electrochemical Society of JapanElectrochemistry2186-24512025-01-0193101700201700210.5796/electrochemistry.24-00107electrochemistryA Diagnostic Method for a Multi-Connected PEM-type Electrolysis System by Current SweepingJiachen GE0https://orcid.org/0009-0001-6042-2032Shinji FUJITA1Akira GUNJI2Motoyuki HIROOKA3Masatoshi SUGIMASA4Hiromu KAKUYA5Environmental Systems Research Department, Decarbonized Energy Innovation Center, Center for Sustainability, R&D Group, Hitachi, Ltd.Environmental Systems Research Department, Decarbonized Energy Innovation Center, Center for Sustainability, R&D Group, Hitachi, Ltd.Environmental Systems Research Department, Decarbonized Energy Innovation Center, Center for Sustainability, R&D Group, Hitachi, Ltd.Environmental Systems Research Department, Decarbonized Energy Innovation Center, Center for Sustainability, R&D Group, Hitachi, Ltd.Environmental Systems Research Department, Decarbonized Energy Innovation Center, Center for Sustainability, R&D Group, Hitachi, Ltd.Environmental Systems Research Department, Decarbonized Energy Innovation Center, Center for Sustainability, R&D Group, Hitachi, Ltd.Water electrolysis is a power-to-gas technology that can be used to decrease the effect of global warming. To reduce its overall cost, we have designed a water electrolysis system containing serially connected water electrolyzers that reduce the site area and increase energy efficiency. One of the issues remaining to be solved is to develop a method that can diagnose the degradation state of the water electrolyzer during operation without significantly changing the current supply. In this study, a diagnostic method, named the sweep method, was developed. A typical procedure of this method is described as follows. A linear sweeping current is applied to the multi-connected water electrolysis system. Then, swept current and response voltage measurements are collected and subjected to linear and nonlinear regression based on an equivalent circuit, -R0-(R1, C1)-, to obtain its circuit parameters. The electrical resistance R0 is elected as the evaluation criteria of the degradation, and the diagnostic results of sweep method are found to be close to those of an impedance analysis. As the method can be conducted without a significant current change, we believe that it can be applied to a large-scale water electrolysis system.https://www.jstage.jst.go.jp/article/electrochemistry/93/1/93_24-00107/_html/-char/enpolymer electrolyte membranemulti-connected water electrolysis systemdiagnostic method |
| spellingShingle | Jiachen GE Shinji FUJITA Akira GUNJI Motoyuki HIROOKA Masatoshi SUGIMASA Hiromu KAKUYA A Diagnostic Method for a Multi-Connected PEM-type Electrolysis System by Current Sweeping Electrochemistry polymer electrolyte membrane multi-connected water electrolysis system diagnostic method |
| title | A Diagnostic Method for a Multi-Connected PEM-type Electrolysis System by Current Sweeping |
| title_full | A Diagnostic Method for a Multi-Connected PEM-type Electrolysis System by Current Sweeping |
| title_fullStr | A Diagnostic Method for a Multi-Connected PEM-type Electrolysis System by Current Sweeping |
| title_full_unstemmed | A Diagnostic Method for a Multi-Connected PEM-type Electrolysis System by Current Sweeping |
| title_short | A Diagnostic Method for a Multi-Connected PEM-type Electrolysis System by Current Sweeping |
| title_sort | diagnostic method for a multi connected pem type electrolysis system by current sweeping |
| topic | polymer electrolyte membrane multi-connected water electrolysis system diagnostic method |
| url | https://www.jstage.jst.go.jp/article/electrochemistry/93/1/93_24-00107/_html/-char/en |
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