Effects of dual-additive electrolyte synergistic the performance of LiNi0.8Co0.1Mn0.1O2/Li batteries

Layered oxide LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) is one of the promising cathode materials for high energy lithium ion batteries , which offering enhanced energy density and battery capacity. However, as the reaction progresses, a series of adverse effects arises. In this paper, the dual-additive electrolyte synergistic effect are ingeniously introduced to the traditional electrolyte LiPF 6 to form a low impedance and stable cathode electrolyte interface on the cathode surface. The specific discharge capacity of the battery at 5C was 154 mAh g −1 , while of the base electrolyte was only 106 mAh g −1 . The battery demonstrated over 82 % capacity retention after 200 cycles at 1C, while the base electrolyte was only 62 %.