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Interplay between Swelling Kinetics and Nanostructure in Perfluorosulfonic Acid Thin-Films: Role of Hygrothermal Aging AITranslate

Meron Tesfaye; Douglas I. Kushner; Ahmet Kusoglu;
University of California Berkeley; Lawrence Berkeley National Laboratory; Lawrence Berkeley National Laboratory
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Publisher: ACS
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Abstract AITranslate

Impacts of processing, storage, and operation on thin-film perfluorosulfonic acid (PFSA) ionomer coatings used in electrodes of electrochemical devices remains unestablished. In this work, alteration of structure–function relationship in ionomers is achieved via exposure to elevated temperature and humidity (hygrothermal aging). Findings reflect a strong inverse correlation between aging-induced ionomer thin-film domain orientation and water-transport kinetics evaluated from swelling. Impact of aging is shown to be more pronounced on platinum due to interactions with PFSA, as evidenced by greater increase in nanodomain orientation parallel to substrate accompanied by reduced water transport, in contrast to silicon support.

KeyWords AITranslate

ionomer thinfilms hygrothermal aging nanostructure domain orientation time constant water transport kinetics
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Basic Information:

DOI：https://doi.org/10.1021/acsapm.9b00005

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Citation Information:

Impacts of processing, storage, and operation on thin-film perfluorosulfonic acid (PFSA) ionomer coatings used in electrodes of electrochemical devices remains unestablished. In this work, alteration of structure–function relationship in ionomers is achieved via exposure to elevated temperature and humidity (hygrothermal aging). Findings reflect a strong inverse correlation between aging-induced ionomer thin-film domain orientation and water-transport kinetics evaluated from swelling. Impact of aging is shown to be more pronounced on platinum due to interactions with PFSA, as evidenced by greater increase in nanodomain orientation parallel to substrate accompanied by reduced water transport, in contrast to silicon support.

quote

GB/T 7714-2015 [1] Meron Tesfaye, Douglas I. Kushner, Ahmet Kusoglu. ACS Applied Polymer Materials, 2019(1). DOI:10.1021/acsapm.9b00005.
MLA [1] Meron Tesfaye, et al., ACS Applied Polymer Materials, no. 1, 2019, https://doi.org/10.1021/acsapm.9b00005.
APA [1] Meron Tesfaye, Douglas I. Kushner, & Ahmet Kusoglu. (2019). ACS Applied Polymer Materials(1). https://doi.org/10.1021/acsapm.9b00005
IEEE [1] Meron Tesfaye, Douglas I. Kushner, and Ahmet Kusoglu, ACS Applied Polymer Materials, no. 1, 2019, doi: 10.1021/acsapm.9b00005. keywords: {ionomer thinfilms;hygrothermal aging;nanostructure;domain orientation;time constant;water transport kinetics}