An Artificial Solid Electrolyte Interphase Enables the Use of a LiNi0.5 Mn1.5 O₄ 5 V Cathode with Conventional Electrolytes

An artificial solid electrolyte interphase (SEI) consisting of a lithium-ion conducting material enables the use of a LiNi0.5Mn1.5O4 cathode with conventional carbonate electrolytes. The coulombic loss and electrolyte oxidation are largely remedied by the nanometer-scale artificial SEI. The thickness of the artificial SEI is optimized by balancing the protection and additional resistance.