Fig. 3: Rate capability and impedance analysis for coated and uncoated cathodes. | Nature Communications

Fig. 3: Rate capability and impedance analysis for coated and uncoated cathodes.

From: Eliminating chemo-mechanical degradation of lithium solid-state battery cathodes during >4.5 V cycling using amorphous Nb2O5 coatings

Fig. 3

Rate capability trends of LTO|SE|NMC cells with (A) uncoated and (B) Nb2O5-coated composite cathodes. Voltage profiles of (C) uncoated and (D) Nb2O5-coated cathodes at different C-rates (C/10, C/5, C/2, 1C, 2C; where 1C = 3 mA·cm−2) at a cut-off voltage of 4.7 V vs Li/Li+. Comparison of polarization estimated from dQ/dV analysis of voltage profiles at different C-rates for (E) uncoated and (F) Nb2O5-coated electrodes. G Nyquist impedance plots of uncoated and Nb2O5-coated cathodes after the rate capability tests. H Zoomed-in view showing Nyquist impedance plots of Nb2O5-coated cathodes. I Comparison of interfacial impedance for uncoated and Nb2O5-coated cathodes after the rate capability tests. The temperature during testing was 60 °C and stack pressure was 7 MPa.

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