In this work, we investigated the intricacies of the voltage reconstruction during the widely applied degradation mode analysis, i.e., different initial parametrizations and different fitting settings. Since we used T-cells with lithium metal reference electrodes, our fitted single-electrode potentials could be validated against the measured ones in addition to the usually validated cell voltages. 
 

Read the open-access article here: https://iopscience.iop.org/article/10.1149/1945-7111/add4a0

Our highlights include: 📄
- high fitting quality with an RMSE of 3.1 mV at the beginning-of-life and <15 mV at 55% state of health.
- the loss of lithium inventory is the main aging mechanism
- the loss of cathode active material is minor at 1.0% to 3.2% and depends on the SoC cycling window. 
- the apparent loss of anode active material is initially negative due to the amorphization of crystalline silicon and also depends on the SoC cycling window.

Additionally, we provided the developed toolbox with a working example including the raw data open-access, available under https://mediatum.ub.tum.de/1766548