Publication
Electrochemical impedance spectroscopy modeling using the dis-tribution of relaxation times and error analysis for fuel cells
| dc.contributor.author | Lopes, Vitor V. | |
| dc.contributor.author | Rangel, C. M. | |
| dc.contributor.author | Novais, Augusto Q. | |
| dc.date.accessioned | 2013-09-23T09:19:00Z | |
| dc.date.available | 2013-09-23T09:19:00Z | |
| dc.date.issued | 2013 | |
| dc.description.abstract | This paper proposes a new approach to determine the distribution of relaxation times (DRT) directly from the electro-chemical impedance spectroscopy (EIS) data, i.e. without the use of an equivalent electrical circuit model. The method uses a generalized fractional-order Laguerre basis to represent EIS where both the parameters of the basis and their co-efficients are estimated by solving a nonconvex minimization problem. Furthermore, the DRT confidence region is de-termined to assess the accuracy and precision of the DRT estimate. The approach is applied to analyze the dominant dynamic properties of an open-cathode hydrogen fuel-cell under different current and air-flow conditions. Results showed that the estimated DRT closely reconstructs EIS data even when there is a higher variance at smaller relaxation times. | por |
| dc.identifier.citation | Lopes, V. Vitor; Rangel, C.M.; Novais, Augusto Q. Electrochemical impedance spectroscopy modeling using the dis-tribution of relaxation times and error analysis for fuel cells. In: HYCELTEC'2013 - IV Iberian Symposium on Hydrogen, Fuel Cells and Advanced Batteries, Book of Abstracts, Estoril, 26-28 June, 2013 | por |
| dc.identifier.uri | http://hdl.handle.net/10400.9/1995 | |
| dc.language.iso | eng | por |
| dc.subject | Fuel cells | por |
| dc.subject | Impedance spectroscopy | por |
| dc.subject | Distribution relaxation times | por |
| dc.subject | Parameter estimation | por |
| dc.subject | Residuals bootstrap | por |
| dc.title | Electrochemical impedance spectroscopy modeling using the dis-tribution of relaxation times and error analysis for fuel cells | por |
| dc.type | conference object | |
| dspace.entity.type | Publication | |
| oaire.citation.conferencePlace | Estoril, Portugal | por |
| oaire.citation.title | HYCELTEC'2013 - IV Iberian Symposium on Hydrogen, Fuel Cells and Advanced Batteries | por |
| person.familyName | Rangel | |
| person.givenName | Carmen M. | |
| person.identifier.ciencia-id | AA13-FF7C-9E29 | |
| person.identifier.orcid | 0000-0001-7996-8142 | |
| person.identifier.rid | D-5477-2011 | |
| person.identifier.scopus-author-id | 7006108156 | |
| rcaap.rights | openAccess | por |
| rcaap.type | conferenceObject | por |
| relation.isAuthorOfPublication | 804e595a-d539-46a2-ae78-6cadc8ca9457 | |
| relation.isAuthorOfPublication.latestForDiscovery | 804e595a-d539-46a2-ae78-6cadc8ca9457 |