What the measurement provides
- Internal resistance
- Capacitance
- Charge-transfer kinetics
- Evaluation of batteries, fuel cells, and corrosion processes
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Electrochemical & Electrical Analysis
Electrochemical Impedance Spectroscopy (EIS)
Characterizes electrical properties of electrochemical systems by applying a small alternating-current signal over a wide frequency range. The impedance response is used to examine internal resistances, capacitance, and charge-transfer kinetics.
Sample requirements
- State the nature of the sample (for example hazardous, volatile, or explosive).
- Minimum of 50 mg of sample for the three-electrode method.
- Coated samples: 1 × 1 cm² of coated substrate with 0.5 cm² uncoated area.
- Only properly prepared solid samples are acceptable.
- Mark EIS under type of measurement. Electrolyte may be acid, base, or neutral.
- Provide potential window, constant current, electrolyte molarity, and electrode details as requested.
The same electrochemical proforma also covers CV and CCD. CCD appears on the form; a separate CCD rate is not published.