fig5

Figure 5. Origin of the enhanced performance enabled by ALD strategy. (A) Comparison of EIS spectra of LMA-Alucone|LLZO/PEO/LiTFSI|Alucone-NCM811 and LMA|LLZO/PEO/ LiTFSI|NCM811 batteries after 50 cycles at 0.1C, 50 °C. (B) PDF of the LLZO/PEO/LiTFSI film before and after cycling in the LMA-Alucone|LLZO/PEO/LiTFSI|Alucone-NCM811 battery. (C) XAS of Ni L-edge of NCM811 (without ALD coating) and alucone-coated NCM811 cathodes. Normalized COO^- signal from TOF-SIMS on the surface of (D) NCM811 and (E) alucone-coated NCM811 cathodes after cycling. (F) SEM images of Li metal surface after 50 cycles of the (i) LMA-Alucone|LLZO/PEO/LiTFSI|Alucone-NCM811 battery and (ii) LMA|LLZO/PEO/LiTFSI| NCM811 battery.