Fig. 2: SEM displaying ionomer film morphology. | Communications Materials

Fig. 2: SEM displaying ionomer film morphology.

From: Impact of processing humidity on ionomer film structure and performance in hydroxide exchange membrane electrolyzers

Fig. 2: SEM displaying ionomer film morphology.

(a–h) Images of ionomer films (roughly 40 µm thick, no accompanying electrode or catalyst layer) cast in 0% (a, e), 9% (b, f), 40% (c, g), and 94% RH (d, h) conditions. Images (a–d) and (e–h) were captured at 20 K and 50 K magnification, respectively. “Divots” reference the artifact in (h). “Treads” are the crack-like structures that run along the majority of the films, highlighted in (g).

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