LiAl-LDHs additives in carbonate electrolytes for realizing dendrite-free lithium deposition in Li metal batteries

The lithium metal batteries (LMBs) using Li metal as the anode are becoming one of the representatives of next-generation high-energy–density batteries. However, uneven deposition and stripping of Li usually cause capacity loss during cycling. To address these issues, NO 3 − intercalated LiAl layered double hydroxides (LiAl-LDHs) nanosheets were used as novel solid additives for conventional carbonate electrolytes. The abundant Li + transport pathways brought by LiAl-LDHs and the interlayer NO 3 − in LiAl-LDHs are beneficial to the uniform concentration distribution of Li + and high-quality solid electrolyte interface (SEI), thereby achieving stable deposition/stripping of Li. The assembled Li||Li symmetric cell was cycled stably for 500 h at a current density of 0.5 mA cm −2 . The Li||LFP(LiFePO 4 ) full cell had a capacity retention of 90 % after 800 cycles at 1C. Even at a high operating temperature of 50 °C, the Li||Li symmetric cells and Li||LFP full cells can still obtain steady charging-discharging performances.