If you go very less scan rate, mobility of ions between electrode and electrolyte will be very proper and you may get very good response.

Dear Nasir,

Yes, I'm concerning about metal oxide electrode for supercapacitor application.

any reference paper that can help me in this topic, plz suggest. 

Dear Selva,

but what reasonable scan rate should be used whether reporting maximum specific capacitance for supercapacitors?

Dear Mahmood,

Its hard to find theoretical values as different researchers analyse their results for different aspects. Its hard to find universal.

Dear B. M. Daas,

I can't understand your question..

We generally scan up to 1 mVs-1.