Figure 5.

Electrochemical characteristics of the pinhole-free-Li₃N–Li metal anode. (a) Nyquist plots of a Li|pinhole-free-Li₃N|Li symmetric cell. The black dot line denotes the experimental data, while the red one represents the fitting data using the equivalent circuit modeling (inset of a). (b) The voltage profiles of the Li|Li₄Ti₅O₁₂ cells with the pinhole-free-Li₃N–Li and the bare Li metal electrodes at 1 C. (c) Cycling behaviors of the Li|Li₄Ti₅O₁₂ cells with the pinhole-free-Li₃N–Li and the bare Li metal electrodes at 1 C. (d, e) Cross-section SEM images of a pinhole-free-Li₃N–Li metal anode (d) and a bare Li metal anode (e) after 100 cycles.