As we know in electrochemical capacitors or supercapacitors, the basic electrochemical signature is CV (cyclic voltammogram) curve. Some materials like $\ce{RuO2}$ and $\ce{MnO2}$ have a capacitive-like CV curves similar to that of EDLC (electro double layer capacitors), so we call such a material pseudocapacitive materials.

On the other hand, materials like cobalt oxides and $\ce{Ni(OH)2}$, which is battery-type electrodes that exhibit faradaic behavior (even those that are electrochemically irreversible), have been presented in the literature as pseudocapacitive materials, which leads to a confusion for the readers.

So, when could we say that a material has a pesudocapacitive behavior?


closed as primarily opinion-based by hBy2Py, Jan, Pritt Balagopal, Jon Custer, Mithoron Aug 21 '17 at 13:35

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  • $\begingroup$ Jargon collisions like this are unfortunately all too common. I don't think you're likely to get a satisfactory resolution. $\endgroup$ – hBy2Py Aug 21 '17 at 3:12