Distribution of relaxation times : Foundations, methods, diagnostics, and prognosis for electrochemical systems

Titelangaben

Wang, Zilong ; Wang, Yuhao ; Ciucci, Francesco:
Distribution of relaxation times : Foundations, methods, diagnostics, and prognosis for electrochemical systems.
In: Current Opinion in Electrochemistry. Bd. 55 (2026) . - 101789.
ISSN 2451-9103
DOI der Verlagsversion: https://doi.org/10.1016/j.coelec.2025.101789

Volltext

	Format: PDF Name: 1-s2.0-S2451910325001486-main.pdf Version: Veröffentlichte Version Verfügbar mit der Lizenz Creative Commons BY 4.0: Namensnennung
	Download (5MB)

Abstract

The distribution of relaxation times (DRT) has become an indispensable technique for interpreting electrochemical impedance spectroscopy. This review traces the evolution of DRT from a powerful deconvolution tool for gaining mechanistic insights into a predictive engine for diagnostics and state estimation in fields such as batteries and fuel cells. The technique’s intuitive appeal is challenged by its mathematically ill-posed nature, creating a “credibility gap” where subjective choices can yield misleading artifacts. Recent methodological advances in Bayesian and entropy-based frameworks provide greater robustness and uncertainty quantification. The path forward requires establishing a comprehensive analytical ecosystem built on community standards, benchmark datasets, and transparent reporting. This current opinion urges the community to embrace rigor and transform DRT from a specialized, expert-level tool into a reliable and reproducible cornerstone of electrochemical analysis.