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13th International Workshop on Impedance Spectroscopy, December 2 - 4, 2020
Workshops
This year, workshops will be organized during the IWIS to discuss the cutting edge research problems, but also to discuss fundamental aspects in different applications fields, namely:

Mystery of the human body: Bioimpedance

Bio-impedance measurement is non-invasive method that shows a high potential in health care monitoring and diseases investigations. Measuring the bioimpedance starts with the choice of the electrodes and their positions, but also the excitation signals and the analog and digital signal processing. But, even after a good measurement procedure, a lot of questions remain open: What did we exactly measure? Skin? Tissue? Bone? ECG Influence? Overlay of all these phenomena? Do we really bypass the skin effect to monitor the bones? Does the impedance spectrum reflect what is inside the body, or is it more the influence of the environment?

Battery in the first life cycle and beyond: Challenges for second life

Despite the extensive researches in the field of batteries, identifying battery parameters for an optimal use is still to this date an open topic. Current standard techniques for assessing the charge or health of the battery are mostly dependent on offline full cycling for work or calibration, which could be time consuming and inconvenient in several applications. In this forum discussion, state-of-health and state-of-charge techniques are discussed: To which degree are we really capable of accessing the batteries’ state, to evaluate it in term of SoC and SoH? Can Impedance spectroscopy be applied online? How to assess a battery's capabilities for a first and second life use? And which prior knowledge is necessary for that? How long is the battery life really?

Secrets of Electrochemistry: Manifold material phenomena

The need for materials: Biodegradable materials, smart materials, functional materials is increasingly gaining importance in science and technology. The quality checking became a fundamental part prior to its use, in order to demystify their corrosion processes and nano-scale structure, but also to monitor them as a fundamental part during their use. For this purpose, destructive, non-destructive, contact-based and contactless methods have been deployed. Impedance spectroscopy, which is a non-destructive method, has gain the focus of science, thanks to its supreme capability of characterizing the electrical behavior of the materials. But, can electrical behavior translate all the phenomena in a material? What can an impedance spectrum tell us regarding the materials? To which dimension can it provide information? How to correctly interpret it in a most efficient way?

Impedance of EVERYTHING: Understanding impedance spectra

Impedance spectroscopy provides an extensive insight on the processes, phenomena and material properties of an object-under-test. This measured data manifest themself as complex impedance in function of the frequency, data fusion process including separable and overlapping phenomena. For understanding the impedance spectrum, many methods have been developed. We can find formal methods, mathematical-based methods, physical and chemical models, analysis and transformation-based methods. But do we know the basic phenomena sufficiently and can these techniques devolve the phenomena correctly? How to choose the suitable method? How to correctly parametrize it? What are today the available signal processing tools for impedance spectroscopy? When can a model get the label of a real physical model?