most critical parameter for this purpose is that what kind of metal oxide you use. If you are using NiCoS, NiCoP, etc then you can get both oxidation and reduction. however, if you are using TiO2, ZnO etc then reduction is very low. Pure rGO and conducting polymers will not show as such high performance to achieve decent performance.
Another important parameter should be the porosity of SC, as conducting polymer might block the channels.
@ Mumtaz Ali
Sir I am using RuO2. Other two component are Pani and rGO.
It is the potential range of the materials on the electrode that determines if the electrode is more suitable for positrode or negatrode or both. For making a symmetrical cell with the same materials on both the positrode and negatrode, the potential range of the materials need to be wide enough to enable a practically meaningful working cell voltage (> 0.5 V or better > 1.0 V).
Most capacitive materials, such as rGOs, PANi, and RuO2 , have a potential window that is wide enough (> 0.8 V in aqueous electrolytes) and can be used to make symmetrical device. However, many battery-type materials, such as NiO and its derivatives have very asymmetrical CVs (i.e. oxidation current peaks are well separated from the reduction peaks) and hence are not good for symmetrical cells.
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