I have made a polyoxometallate material for a cathode in an aqueous sodium battery. I have deposited it on FTO glass, and I will use Pt wire as the counter electrode and Ag/AgCl as a reference electrode in 1 M Na2SO4 aqueous electrolyte.
My question is, what cut-off voltage should I select for galvanostatic charge-discharge? How do we choose it? Please ask me if the question is not clear enough.
Thank you Ioannis Samaras . I will share the results with you soon.
I wonder if 1.7 V is too high a voltage and can cause water splitting due to aqueous electrolyte.
Yes, indeed, 1.7 V is too high, as a DC (or a steady state) polarization, but despite that some very fast[1] CVs might act, temporary, as 'safe' for your case study.
1. V_rates, 100 mV/s (and 50 mV/s).
Dear Ioannis Samaras, Please check the attached CV graphs as you suggested.
Good work, as a 1st phase study.
Now, in a next (2nd) phase, you could (re)make, dear Saad Sarwar ,
some similar CVs, but in a safe(r)
a) potential range[1], and more common
b) V-rates[2].
1. A new (proposal) potential range: [-1.3, 1] V.
2. A small (minimum) list of V_rates: [10, 5, 1] mV/s.
Thank you Ioannis Samaras , what can we know about the charge discharge voltage window from the CV.
Can you explain your suggestions for slower scan rates in smaller potential regions? What are we trying to get here? Kindly respond.
You will know if this electrode material might be, really, useful for your[1] final goal(s).
1. Quot. from (your initial) question Saad Sarwar : "I have made a polyoxometallate material for a cathode in an aqueous sodium battery."
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