This can be done with the electrochemical impedance spectroscopy, at constant potentials. Ro is resisatance at fully charged or discharged electrode, and R is a resistance at measured potentials.

Thanks Branimir.

can you please suggest me good article which explains how to perform   electrochemical impedance spectroscopy?

Dear Mangesh,

some basic overview of the EIS can be seen  at:

https://www.gamry.com/assets/Uploads/Basics-of-Electrochemical-Impedance-Spectroscopy.pdf

and instrumentation required at:

https://www.gamry.com/application-notes/EIS/basics-of-electrochemical-impedance-spectroscopy/

Greetings

Branimir

Thanks Branimir.