Overpotentials in Electrochemistry

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[bobstevens]

A dilemma or conundrum exists here in regard to the drop in battery voltage upon discharging. It can easily be shown that as we raise the circuit resistance, we experience less polarization of the two electrodes towards each other (and this co-polarization of the electrodes is what causes this apparent battery voltage drop) under loading/discharge. In other words if we short circuit the external battery circuit and/or reduce the internal electrolyte resistance in the battery, there is more polarization of the terminals upon loading which reduces the overall voltage more. So now we have a situation where the less actual IR drop that actually occurs in the circuit causes more, not less, battery voltage drop upon discharge which you are calling "IR drop". So therefore the lower the resistance is, the higher what you call "IR drop" is. This does not make sense.

[EChem_Channel]

Correction: I mislabeled the axes of the CV on the slide that talks about "Ohmic Overpotential". Sorry for the confusion!

[fencrosy]

why your CV has y axis of potential and x axis of current?

[shide]

I can deal with the pace, but will more appreciate if you talk clearly

[ankitaranisahu]

Book name or available this book in internate