Modeling of porous insertion electrodes: the utility of cyclic voltammetry and differential voltage spectroscopy

摘要

1. Multi-site, multi-reaction (MSMR) model, or some other equivalent formulation, is necessary to capture the clearly different and distinct reactions a. We used a specific MSMR formulation that has been shown to work well in thermodynamic modeling of LMO, NMC, LFP, and lithiated graphite 2. By using lower and higher frequency data, we can address thermodynamic and irreversible processes 3. The resulting fit seems good insofar as the differences between the experiment and model are similar to experiment-to-experiment variation 4. Porous electrode models of this type have a lot of parameters, which is problematic. To my knowledge, for the first time, we examine the sensitivity of the parameters to determine which parameters dominate the model behavior. 5. Open questionseeds a. Colder temperatures b. Higher frequencies, which would yield higher current densities c. Lower frequency analysis to remove hysteresis, if possible? d. This analysis employed two reactions—are three needed?