Abstract
The aim of this work is to improve a new alternative representation of impedance data proposed in a previous communication that greatly facilitates identification of the number of contributing elements and to use this approach to provide starting parameters for non-linear least squares fitting. This alternative representation allows estimation of the number of processes involved in the impedance spectra with a greater degree of confidence and to discriminate overlapped processes within a factor of 3 in their relaxation frequencies for processes with similar strength, using a model constituted by R-CPE elements.
The starting parameters for the non-linear fitting can be obtained from the equations proposed for the simplified behaviour of the impedance data. Additionally two types of plots are proposed to get a further rough estimation of the resistance and capacitance values.
The approach was tested with a simulated and an experimental case. (c) 2005 Elsevier B.V. All rights reserved.
| Original language | English |
|---|---|
| Pages (from-to) | 2011-2022 |
| Number of pages | 12 |
| Journal | Solid State Ionics |
| Volume | 176 |
| DOIs | |
| Publication status | Published - 15 Aug 2005 |
Keywords
- impedance spectroscopy
- equivalent circuit
- R-CPE elements
- non-linear fitting
- LEAST-SQUARES
- IMMITTANCE DATA
- ADMITTANCE DATA
- SPECTROSCOPY
- CERAMICS
Fingerprint
Dive into the research topics of 'Application of an alternative representation to identify models to fit impedance spectra'. Together they form a unique fingerprint.Cite this
- APA
- Author
- BIBTEX
- Harvard
- Standard
- RIS
- Vancouver