Next, we investigated a lithium-ion battery with a LiFePO4 (LFP) cathode, a lithium-metal anode, and 1M LiPF6 in ethylene carbonate:diethyl carbonate (1:1 v/v) as an electrolyte . EIS measurements were collected at frequencies ranging from 0.1 Hz to 7 MHz with a 5C chargedischarge rate at cycles 30, 60, 90, and 120. The data were regressed using a 2×ZARC ECM, with the parameters provided in Table .