Electrochemical Impedance Spectroscopy
Related Patents: 7088115
Contact: David R. Anderson
Phone: (208) 526-0837
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The INL has developed an impedance spectroscopy, which is useful as a method to detect a departure from a known state or composition of a system.The basic technique of electrochemical impedance spectroscopy applies a current or voltage signal to the sample to be evaluated and measures the resulting voltage or current response. When used in the alternating current mode, the signal-response data is collected over a range of frequencies, generally in the 10 MHz to lm Hz range. The shape, slope, infl ection points and range of frequency response depend on the physical and chemical characteristics of the system being evaluated. In order to interpret the impedance spectrum, an equivalent electrical circuit (consisting of resistors, capacitors, parallel and series circuits) must be developed for the genera class of materials being evaluated.