3 years ago

Overdamped Oscillator Model with a Complex Viscosity To Interpret Impedance Spectroscopy Data

Overdamped Oscillator Model with a Complex Viscosity To Interpret Impedance Spectroscopy Data
Fernando C. M. Freire, Thiago M. Andrade, Arthur E. T. Silva
We propose a new framework to interpret impedance spectroscopy data by taking into account the ionic motion near to the electrodes limiting the electrolytic sample. This ionic motion is described by an overdamped harmonic oscillator model (ODO). We introduce a complex viscosity approach that has some equivalence with an anomalous diffusion model. The results show that this complex viscosity model predicts an impedance behavior that is very similar to the one predicted by an equivalent circuit having a constant phase element (CPE). We demonstrate that this mechanical model based on the overdamped oscillator has always an equivalent circuit, and both approaches may be applied to analyze impedance spectroscopy data, especially in the low-frequency region.

Publisher URL: http://dx.doi.org/10.1021/acs.jpcc.7b07300

DOI: 10.1021/acs.jpcc.7b07300

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.