LITHIUM-ION BATTERY, BATTERY MODULE, BATTERY PACK, AND APPARATUS

This application provides a lithium-ion battery, a battery module, a battery pack, and an apparatus. The lithium-ion battery includes a positive electrode plate, a negative electrode plate, a separator, and a nonaqueous electrolyte. The positive electrode plate includes LiNiCoMeOY, where −0.1≤x≤0.2, 0.8≤a