Dear all,

I would like to ask a question about the cyclic voltammetry technique. For your information, I haven't learned electrochemistry at a university at all.

Previously, I tested some additives dissolved in EC/EMC (solvent) having 1 M LiPF6. I used Li metal as a reference electrode (RE) and Pt as a counter and a working electrode (CE, WE). In this way, I could check if the additives are electrochemically stable up to 4.5 V (vs Li/Li+). Now I wish I could use Ag/Ag+ as a reference electrode using 1M AgNO3 solution instead of Li metal because I don't have a glove box anymore. So what I did was to check if the result from Ag/Ag+ could be directly converted to the result from Li/Li+.

Ag+ + e- -> Ag (Eo = +0.80 V)

Li+ + e- -> Li (Eo = -3.05 V)

As far as I understand, I need to shift the result from Ag/Ag+ by adding +3.85V to see if it is as same as the result from Li/Li+. However, these two results are not overlapped each other. Based on the shape of the curves, there is still a difference in voltage (roughly 0.7-0.8V). Without shifting in voltage, the OCVs are 3.47 and 0.24, respectively, for the cases of Li/Li+ and Ag/Ag+. Please see the attached image to find these curves. I would appreciate any helps or comments you could provide.

Best regards,

Sung Cik Mun