Lithium Hexamethyldisilazide Endows Li||NCM811 Battery with Superior Performance

The construction of stable cathode electrolyte interphase (CEI) is the key to improve the NCM811 particle structure and interfacial stability via electrolyte engineering. In He's work, lithium hexamethyldisilazide (LiHMDS) as the electrolyte additive is proposed to facilitate the generation of stable CEI on NCM811 cathode surface and eliminate H2O and HF in the electrolyte at the same time, which boosts the cycling performance of Li||NCM811 battery up to 1000 or 500 cycles with 4.5 V cut-off voltage at 25 or 60 degrees C.

Automated summary

The construction of a stable cathode electrolyte interphase (CEI) is crucial for improving the NCM811 particle structure and interfacial stability through electrolyte engineering. In He's research, lithium hexamethyldisilazide (LiHMDS) is proposed as an electrolyte additive to facilitate the formation of a stable CEI on the NCM811 cathode surface while eliminating H2O and HF in the electrolyte. This approach enhances the cycling performance of the Li||NCM811 battery to 1000 or 500 cycles with a 4.5 V cut-off voltage at 25 or 60 degrees C.