Modeling of Relative Humidity-Dependent Impedance of Polymer Electrolyte Membrane Fuel Cells

Akihisa Tanaka, Keisuke Nagato, Morio Tomizawa, Gen Inoue, Masayuki Nakao

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Equivalent circuit modeling is a powerful technique for analyzing the complex impedance of polymer electrolyte membrane fuel cells. The transmission line model, which is based on reactant transport and electrochemical reactions, is frequently applied to porous electrodes. In this study, the distribution of the local charge transfer resistance was considered to accurately evaluate the dependence of the impedance on relative humidity (R.H.). The impedance of the prepared single cell was measured at 0.7 V under various R.H. conditions. The fitting results to the measured impedance spectra confirmed that a strong positive correlation exists between R.H. and proton conductivity. The exchange current density was determined in advance to simulate the impedance with dependence on R.H. The proposed model can simulate the experimental trend in which the total resistances of proton conduction and charge transfer decreased inversely to R.H.

Original languageEnglish
Title of host publicationECS Transactions
PublisherInstitute of Physics
Number of pages11
ISBN (Electronic)9781607685395
Publication statusPublished - 2022
Event242nd ECS Meeting - Atlanta, United States
Duration: Oct 9 2022Oct 13 2022

Publication series

NameECS Transactions
ISSN (Print)1938-6737
ISSN (Electronic)1938-5862


Conference242nd ECS Meeting
Country/TerritoryUnited States

All Science Journal Classification (ASJC) codes

  • General Engineering


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