Impedance Spectroscopy ·
Nyquist & the Randles Circuit
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.com · 10 mV sine · 100 kHz → 10 mHz · Z(ω) = Z′ − jZ″
frequency
100 kHz
phase φ
0°
State
—
Excitation E(ω) / double layer Cdl
Current response / charge transfer Rct
Nyquist Z(ω) · semicircle
Warburg diffusion · 45° tail
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.com · Electrochemical Impedance Spectroscopy (EIS)