Norbornenic anhydride as versatile additive optimizing interphases to enable high-performance LiNi0.8Co0.1Mn0.1O2/Li batteries

Optimizing the electrode/electrolyte interface structure is the key to realizing high-energy-density Li-metal batteries (LMBs) with nickel-rich LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) cathode. Herein, a versatile additive, norbornene dicarboxylic anhydride (NA), is dedicated to constructing robust interphase layers in NCM811ǁLi batteries. Theoretical calculations and experimental results show that NA induces the formation of thin and stable cathode-electrolyte interface (CEI) / solid-electrolyte interface (SEI) films at the electrodes’ surfaces. The NA-induced CEI film on the cathode effectively protects NCM811 and improves its structural stability during long-term cycling, thus avoiding the material rupture and the dissolution of transition metals. On the other hand, the SEI film on the anode also enhances the performances of interface between electrolyte and Li-metal…