Communication-Contribution of Catalyst Layer Proton Transport Resistance to Voltage Loss in Polymer Electrolyte Water Electrolyzers

Mass transport losses (ηmtx) play a significant role at high current densities in polymer electrolyte water electrolyzers (PEWEs). Previous work has shown that ηmtx depends on the porous transport layer (PTL) structure, although a clear correlation between the material morphology and ηmtx has not be...

Full description

Saved in:
Bibliographic Details
Published inJournal of the Electrochemical Society Vol. 165; no. 15; pp. J3016 - J3018
Main Authors Babic, Ugljesa, Schmidt, Thomas J., Gubler, Lorenz
Format Journal Article
LanguageEnglish
Published The Electrochemical Society 2018
Online AccessGet full text

Cover

More Information
Summary:Mass transport losses (ηmtx) play a significant role at high current densities in polymer electrolyte water electrolyzers (PEWEs). Previous work has shown that ηmtx depends on the porous transport layer (PTL) structure, although a clear correlation between the material morphology and ηmtx has not been established. In this work, we experimentally determine the overpotential ηH +CLa associated with the proton transport in the anodic catalyst layer by measuring the ionic resistance in the catalyst layer using electrochemical impedance spectroscopy (EIS) and the transmission-line model. We found that overpotentials, including ηH +CLa, depend on the PTL morphologic surface properties.
Bibliography:0031815JES
ISSN:0013-4651
1945-7111
DOI:10.1149/2.0031815jes