Previously, we organized a tutorial on analyzing EIS data using the DRTtools tool. Initially, we imported data in txt format without any issues, and it was very successful.The specific tutorial can be found here: Applications of Electrochemical Impedance Spectroscopy (EIS) in Electrocatalysis: Testing Methods and Data Analysis.Recently, when using it again, I found that no matter how I adjusted the format of the txt file, I could not import the data. After half a day’s exploration, I discovered a simple and effective solution:Keep the data with three columns: frequency, real part, and imaginary part, then save the Excel sheet as a .csv format. After that, import the data into the DRTtools software for data analysis.This is a small research tip that I hope can help you avoid wasting time on trial and error. I hope it helps!Wishing everyone a pleasant weekend and happy research!