For the fabrication of the counter electrode (activated carbon (95%) and PTFE (5%)), I am using the mortar pestle mixing method and the overnight stirring method followed by a rolling or doctor blade on the glass slide. But in both methods when I peel it off it got cracks or breaks down. I continuously repeating it and it's not working.
When applying the material to the slide via ultrasonic atomization you should be able to avoid cracks. Dilute the material in 50% water, 50% IPA and then spray onto the slide in layers to build up your target thickness. Apply heat to the slide at about 50 C while coating to drive off the water. Peel off.
Robb Engle Thank you so much for the suggestion and finally, I am succeeded in getting a free-standing film of the counter electrode
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