Hi all,

I am trying to measure the conductivity of a polymer electrolyte using EIS (Electrochemical Impedance Spectroscopy). I've been getting really high impedance values on my instrument and so I tried to test a 50x50x1.5mm block of aluminum so that I could compare my values with the known. I've been getting impedance values as high as 0.7Ohm*m for the aluminum block, which has known resistance in the nano Ohms range.

As far as I understand it, impedance is just resistance but in an AC circuit. At least that is what I used to think, but now I am not so sure.

What is the difference between impedance and resistance? Is it possible to use math to convert between the two?

Thanks

-bdc69