Capacitance Value from CPE, R_Parallel: A Calculator

RESOURCES > EIS > CPE > CAPACITANCE from CPE, R_Parallel

This calculator can be used to calculate the "true" capacitance from a depressed semicircle model ( a Constant Phase Element in parallel with a resistor ). 

Fit your data to the (RQ) model. Enter the best fit results for R, Qo, and exponent, n, in the form, below. Press [Convert ...] to update the value of the capacitance.

The equation used by this calculator is:  C = ( Qo * R )^(1/n) / R
It is easily derived from eqn 3 on the ZARC element page once you realize that T=RC.

The equation for the constant phase element assumed by this calculator is:

Z = 1 / [ Qo * ( j * )ⁿ ]

More About EIS

 Did you find this calculator useful? We'd like to know !
 

� Copyright 2006-2009 Research Solutions & Resources. 
All rights reserved.