I have prepared the powder sample, which is active for pseudosupercapacitor application. I am interested to check the supercapacitor device in a solid state using a gel electrolyte. So, any one can suggest me the possible way to fabrication of solid state pseudosupercapacitor using a gel electrolyte.
Thanks in advance.
Syam, the following typical steps for your reference:
1) Prepare two electrodes with your powder. You probably need a polymer binder and carbon black in addition to your material to fabricate the electrodes. The weight ratio of the active material: binder: carbon black is usually 85:5:10.
2) Prepare the PVA gel electrolyte (need to slightly heat the solution and constantly stir it to fully dissolve PVA powder). Generally, 1 g PVA powder per 10 mL water.
3) Dip your two electrodes in the PVA gel electrolyte. Let the electrodes be fully soaked by the gel electrolyte. Take the electrodes out and hang them for a while to let excessive gel flow down.
4) Sandwich a piece of separator in between the two soaked electrode. The separator can be wetted by the gel electrolyte prior to the assembly.
5) Wrap the sandwiched structure wit parafilm or other films to well seal the device. This sealing step is critical as PVA can gradually dry when exposed in air which results in capacitance loss.
6) Gently press the two electrodes to improve the filtration of the gel electrolyte and the contact between the two electrodes.
7) Done. Enjoy testing.
Dear Liu,
Thank you so much for your clear explanation and I have received some idea about how to fabricate a Solid state device supercapacitor. I will try the procedure as you explained above.
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