# Acid-Doped Hydrogel Electrolytes for Electrocatalyst Interfaces

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- Authors: Adlai Katzenberg, Cesar Muñoz Davila, Brian Chen, Tana Siboonruang, Miguel A Modestino
- Journal: ACS Applied Polymer Materials
- Year: 2020
- Volume: 2
- Pages: 2046–2054
- DOI: 10.1021/acsapm.0c00214
- Instrument used: openQCM

## Abstract

Polymer–electrolyte membranes (PEMs) are ubiquitous to state-of-the-art electrochemical devices (i.e., fuel cells and water electrolyzers). Stable PEMs have been historically limited to a small class of perfluorinated sulfonic acid ionomers (PFSAs), which are expensive, difficult to synthesize, and have several key mass-transport limitations that restrict the achievable current densities in PEM devices. Specifically, structural changes in PFSA ionomers observed under low humidity and confined length scales (

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