When: November 11-12, 2019 Where: Windsor Suites 1700 Benjamin Franklin Parkway Philadelphia, PA (USA) Gamry Instruments is proud to once again co-sponsor the EIS (Electrochemical Impedance Spectroscopy) Short Course being held November 11th-12th at the Windsor Suites, 1700 Benjamin Franklin Parkway, Philadelphia, PA (USA). This year the two-day, hands-on course is designed for researchers who are Read more about A New Two-Day Hands-on EIS Short Course Philadelphia[…]
Gamry added a new Technical Note in the electrochemical impedance spectroscopy (EIS) section of their Application Notes on their web site Gamry.com. This note assumes that you have read and understand the material covered in the Application Note “Basics of Electrochemical Impedance Spectroscopy.” The purpose of this Technical Note is to show that you can Read more about Electrochemical Impedance Spectroscopy on Curved Electrodes[…]
Registration is now open for the Spring 2017 Electrochemical Impedance Spectroscopy Short Course to be held in Houston, TX The 29th Annual Short Course on Electrochemical Impedance Spectroscopy: Theory, Applications, and Laboratory Instruction. Gamry Instruments is proud to once again sponsor the EIS (Electrochemical Impedance Spectroscopy) Short Course. The spring 2017 course is being held Read more about Gamry Instruments to Sponsor EIS Short Course[…]
Gamry Instruments has taken one of their most popular Application Notes, The Basics of Electrochemical Impedance Spectroscopy, and revised it into a new easy-to-read resource for researchers, academics and professionals. This newly designed reference guide is a primer on EIS and includes descriptions, formulas, and data presentations to get you started on building your knowledge Read more about Basics of Electrochemical Impedance Spectroscopy[…]
An electrochemical cell consists of two half-cells. Each half-cell consists of an electrode in contact with an electrolyte. An electrode is an electronic conductor such as metal or carbon or a semiconductor. Current flows through the electrodes via the movement of electrons. An electrolyte is a phase in which charge is carried by ions. In Read more about What are Electrochemical Cells?[…]
Registration is now open for the Spring 2016 EIS Short Course being held in Houston, TX The 28th Annual Short Course on Electrochemical Impedance Spectroscopy: Theory, Applications, and Laboratory Instruction will be held April 25-29, 2016 at the Crowne Plaza (at Reliant Stadium) in Houston, Texas. This EIS Short Course will provide a working knowledge Read more about Spring 2016 EIS Short Course[…]
An all new webinar has been scheduled – “Electrochemical Impedance Spectroscopy and its Applications to Battery Analysis” When: Wednesday April 29, 2015 What Time: 10:00 a.m. EDT USA / 4:00 p.m. CET Europe / 10:00 p.m. China Duration: 1 hour This webinar will focus on the following key topics: What is impedance spectroscopy? What can Read more about EIS Applications to Battery Analysis[…]
by 3 Different Techniques
We began with a simple LPR (Polarization Resistance) experiment. The results are shown to the right. Analysis of the data within 5 mV of Eoc gave the line shown in red. It corresponds to an Rp value of 687 ohm. Using the default beta values of 120 mV/decade yields a corrosion rate of 5.77 mpy in this electrolyte. This estimate can be refined if better estimates of the beta values are known. More about this shortly!
Electrochemical Impedance Spectroscopy by Mark E. Orazem and Bernard Tribollet now available in Chinese from Chemical Industry Press (CIP) Publishers. This book provides the background and training suitable for application of impedance spectroscopy to varied applications and is an excellent textbook for graduate students in electrochemistry, materials science, and chemical engineering. 马克•欧瑞姆和伯纳德•特瑞博勒特的专著 «电化学阻抗谱»一书，目前由中国化学工业出版社（CIP）出版。这本书提供了阻抗谱的详细背景和知识、提供了具体的应用实例，对于电化学，材料科学和化学工程的研究生来说，是一步难得的培训教材。
Gamry will be holding a Workshop at the ECS Meeting in Cancun, Mexico. If you do EIS on very low impedance or very high impedance samples then you should attend Gamry’s workshop at the ECS meeting tomorrow. This workshop will cover precautions needed for analyzing very low impedance samples such as batteries and fuel cells as Read more about Electrochemical Impedance Spectroscopy of Difficult Samples[…]
What Are They?
Why Are They Useful?
Porous electrodes offer a high surface area to volume or weight ratio which is highly beneficial to a number of energy generation or storage devices. (e.g. Dye-Sensitized Solar Cells, Super-Capacitors, Fuel Cells, etc). Transmission lines are heavily used in modeling in Electrochemical Impedance Spectroscopy (EIS) experiments where porous systems are employed.
Though transmission lines are commonly used, an introductory paper was hard to find. This paper is intended to serve that purpose. It assumes basic knowledge of EIS and modeling using equivalent circuits as covered in our EIS application note.
Nomenclature and Notation
We will distinguish between the base electrode and the porous electrode and the various interfaces as shown in Figure 1.
The 26th Annual Fall EIS Short Course:
Electrochemical Impedance Spectroscopy:
Theory – Applications – Laboratory Instruction
Dates: November 10-14, 2014
Where: Houston, Tx
Impedance spectroscopy is an extremely powerful non-destructive investigative technique that can obtain essential information about interfacial and bulk material parameters through the use of low energy, time varying electrical excitation. When applied to an electrochemical system, electrochemical impedance spectroscopy (EIS) can provide information on reaction parameters, corrosion rates, oxide characteristics and integrity, surface porosity, coating integrity, mass transport, and many other electrode/interface characteristics. EIS is possibly one of the most powerful methods available in electrochemistry today and is utilized in research and development in essentially every technical sector, e.g., transportation and infrastructure, batteries and fuel cells, medicine, among many others. However, effective utilization of this method has been hindered by the lack of a comprehensive and cohesive explanation of the theory, measurement, and analysis techniques. This course on EIS has been developed to fill this void.
This short course, now in its 26th year, was first taught in 1988 in Charlottesville, Virginia. It has recently had the tremendous fortune of moving to the vibrant and technologically rich city of Houston, Texas. Please read more about our course on this website, or contact us either by e-mail or telephone.