AC impedance of lithium-ion batteries

Electrochemical impedance spectroscopy (EIS) has many advantages for studying lithium-ion battery systems. The impedance information of the battery's Ohmic Impedance (RS), Interface Layer (SEI), Charge Transfer Reaction (Rct), and Diffusion Process (W) can be obtained through an EIS spectrum. During the EIS measurement process, there is no need to disassemble the battery, which avoids the influence of environmental conditions on the battery material and allows for measurement in the battery workstation state.