Iam having all data but dont know analysis of EIS in electrochemical analysis and cyclic retention by GCD curve. I want to know from where to begining how to do that
This is not a quick problem to solve: you're trying to learn two very large fields of knowledge, each with their own terminology and foundation theory. I would recommend narrowing your scope, based on your cell design and your direct goals (what part of the impedance spectra applies to the topic of your study? what parameter are you trying to optimise while cycling?). Then you'll be able to learn from other studies with similarities. After that, feel free to ask for specific advice on this forum.