Work

Total harmonic distortion: In-situ diagnostics of pressure fluctuations for anion exchange membrane water electrolysis

Year: 2026

Type: article

Abstract: In this study, total harmonic distortion (THD) spectroscopy combined with electrochemical impedance spectroscopy(EIS) was employed to systematically investigate the pressure-dependent frequency response behavior of the anode and cathode in an anion exchange membrane water electrolysis (AEMWE) system. The results show that as the anode pressure increases, the THD value decreases in the frequency range from 158 Hz to 0.1 Hz, whereas as the cathode pressure rises, the THD value increases in the frequency range from 100 Hz to 0.1 Hz, with rising cathode pressure. This divergence represents a distinct trend compared to conventional EIS observations. Furthermore, real-time THD monitoring at a fixed excitation frequency shows a rapid and sensitive response to pressure changes, highlighting its capability for in-situ diagnostics. These findings suggest that THD spectra provide critical complementary data to EIS, serving as a robust tool for detecting pressure fluctuations in AEMWE systems.

Source: Electrochemistry Communications

DOI: 10.1016/j.elecom.2026.108184

Authors: Dong Yunze, Mao Qing, Liu Min, Wu Qiliang

Institutions: Dalian University of Technology, State Grid Zhejiang Electric Power Company (China)

Language: English

Topic: Fuel Cells and Related Materials

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,630

Funders: Science and Technology Project of State Grid, State Grid Zhejiang Electric Power Company