Publications Repository - Gdańsk University of Technology

A comprehensive description of impedance ofelectrochemical systems has been presented, along withthe assumptions of the method used. In this method, amultisinusoidal current excitation signal is used. Thechanges of potential of both the electrodes and thepotential difference between these electrodes are allregistered simultaneously as a function of time. Theproposed method offers the possibility of separatelydetermining the instantaneous value of impedance ofeach electrode as well as the impedance of a twoelectrodesystem. The short-time Fourier transform oftime registers allow the determination of changes in themeasured impedance values over time. The method hasbeen successfully verified with an electrical equivalentcircuit simulating a non-stationary two-electrode system.The values of the impedance of particular componentsduring operation of the fuel cell under a changingload have been obtained.

Authors

• dr hab. inż. Paweł Ślepski link open in new tab ,
• prof. dr hab. inż. Kazimierz Darowicki link open in new tab ,
• dr inż. Ewa Janicka link open in new tab ,
• dr hab. inż. Grzegorz Lentka link open in new tab