Fig. 5: Impedance of Cu | |NMC622 and coated Cu | |NMC622 cells. | Nature Communications

Fig. 5: Impedance of Cu | |NMC622 and coated Cu | |NMC622 cells.

From: Origins of lithium inventory reversibility with an alloying functional layer in anode-free lithium metal batteries

Fig. 5

a Representative Nyquist plots in the charged and discharged state of Cu||NMC622 and coated Cu||NMC622 NMR pouch cells throughout cycling. b Representative Nyquist plots of individual electrode impedance data after the 15th discharge cycle using Cu||NMC622 and coated Cu||NMC622 PAT three-electrode cells. c Representative, state of charge (SOC) dependent Nyquist plots of the last and first 20 dynamic impedance spectra for the 30th and 31st cycle of NMC-based batteries using Cu, coated Cu and Li as the negative electrode, respectively. Impedance data is displayed in a frequency range from 30 kHz to 1.0 Hz with an alternating current of 0.065 mA cm−2 superimposed on the charge/discharge current of 0.05 mA cm−2. Electrolyte: LHCE.

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