I am working on supercapacitors and using NaOH as electrolyte but I am facing some problem while using NaOH electrolyte. Can anyone please tell me what are the other electrolyte I can use to check capacitive performance.
The effect of the electrolyte on capacity is important. On the one hand, ion sizes are important, especially if you have porous electrodes.
Adsorption properties determine the capacity as well as possible faradaic surface reactions that can provide a pseudocapacity. The pseudocapacity is usually much larger (factor >5) than double layer capacity alone.
Ion mobility is an important factor for power density as well. Especially in porous electrodes, in which the ions have to travel to the bottom of the pores.
So the "best" electrolyte depends on a lot of factors. Another suggestion to the above ones would also be HCl, NaCl etc. but there are tons of possibilities and it really depends on your electrode (material, porous structure etc.).
The effect of the electrolyte on capacity is important. On the one hand, ion sizes are important, especially if you have porous electrodes.
Adsorption properties determine the capacity as well as possible faradaic surface reactions that can provide a pseudocapacity. The pseudocapacity is usually much larger (factor >5) than double layer capacity alone.
Ion mobility is an important factor for power density as well. Especially in porous electrodes, in which the ions have to travel to the bottom of the pores.
So the "best" electrolyte depends on a lot of factors. Another suggestion to the above ones would also be HCl, NaCl etc. but there are tons of possibilities and it really depends on your electrode (material, porous structure etc.).
I would like to add one more point...you must check Pourbaix diagram and see which value of pH suits to your electrode material for its use in SC...That would help you to choose electrolyte (either it should be acid base or neutral). Once the desired pH is ascertained then you can choose electrolyte (amongst the electrolytes available for that pH value) according to porosity of the electrode material...Also choose current collector accordingly...NaOH, KOH are corrosive to some current collector (for ex. Al foil), that might causing failure of your device in present case...Hope this helps
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