Identifying Anode and Cathode Contributions in Li-Ion Full-Cell Impedance Spectra

Measured impedance spectra of Li-ion battery cells are often reproduced with equivalent circuits or physical models to determine losses due charge transfer processes at the electrodes. The identified model parameters can usually not readily unambiguously be assigned anode and cathode. A new measurement method is presented that enables assignment features full single To this end, temperature gradients imprinted perpendicular electrode layers a single-layered cell while measured. exploits different dependences electrodes on temperature. An circuit RC-elements effect related properties discussed demonstrate feasibility method. reliable change shown possible. used identify if changes in an spectrum originate from