fig2

Tuning the ion-transport nanochannels of sulfonated poly(ether ether ketone) membranes for efficient aqueous organic redox flow battery

Figure 2. (A) Volumetric expansion of the membrane after the controlled solvent swelling treatment using different solvent concentrations, and digital photos of (B) SPEEK40, (C) SPEEK45, and (D) SPEEK50 membranes.

Energy Materials
ISSN 2770-5900 (Online)
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