Cell overpotential diagrams Is there anyone who knows a book where I can find a detailed explanation of cell overpotential diagrams, like the ones shown here? 

Thanks in advance!
Not sure what kind of explanation you are looking for, but 

Electrode Dynamics, A. C. Fisher, Oxford Chemistry Press, 1996, ISBN: 019855690X

is a great concise explanation of overpotentials among other things.