fig3

Figure 3. Characteristics for Li-Li symmetric cells: (A) Cycling performance comparison among Li/Li symmetric cells using different electrolytes (PEO/LiTFSI or LLZO/PEO/LiTFSI) and different Li metal electrode (with or without alucone coating layer by ALD method); (B) Enlarged view showing cycling performance of LMA-Alucone|LLZO/PEO/LiTFSI|Alucone-LMA in (A). SEM images depicting the morphologies on the surface of LMA after 100 cycles from (C) LMA| LLZO/PEO/LiTFSI|LMA and (D) LMA-Alucone|LLZO/PEO/LiTFSI|Alucone-LMA. TOF-SIMS 2D mapping on the surface of LMA after cycling: signals of CH_x^- from (E) LMA| LLZO/PEO/LiTFSI|LMA and (F) LMA-Alucone|LLZO/PEO/LiTFSI|Alucone-LMA, as well as signals of COO^- from (G) LMA|LLZO/PEO/LiTFSI|LMA and (H) LMA-Alucone|LLZO/PEO/ LiTFSI|Alucone-LMA.