(Invited) Total Harmonic Distortion for PEM Fuel Cell. (5th January 2017)

• Record Type: Journal Article
• Authors: Zhang, Xueyuan; Moosbauer, Dominik; Kojevnikov, Alexander; Yaffe, Max
• Is Part Of: ECS transactions. Volume 75:Number 38(2016)
• Page Start: 17
• Page End: 28
• Publication Date: 2017-01-05
• Subjects: Electrochemistry -- Periodicals; Electrochemistry; Periodicals; Electronic journals; Electronic journal; 541.37
• DOI: 10.1149/07538.0017ecst
• Languages: English
• ISSNs: 1938-5862

Abstract

Abstract : Electrochemical Impedance Spectroscopy (EIS) is well developed and widely applied for the study of electrode/electrolyte interfaces, films, coatings, and ion-transport mechanisms, among others. Measurement and analysis of traditional EIS is based on linear response in voltage or current to a sinusoidal perturbation. Small perturbations with linear responses are used in traditional EIS. Larger perturbations applied to nonlinear systems require a new set of tools. In the present study, we focus on the larger amplitude modulation and analysis of the harmonic response with the purpose of improving signal-to-noise ratio, and deriving additional information about the electrochemical system. Traditional EIS is extended to include Total Harmonic Distortion (THD) analysis. Non-linear harmonic distortion, instrument noise, and perturbation amplitude effects are discussed relative to monitoring oxygen concentration and operation status of a PEM fuel cell (PEMFC). Alternative approaches such as Intermodulation Distortion (IMD) are also introduced.