Patent ID: 11522185

Abstract:
A rechargeable lithium battery includes a positive electrode including a positive current collector and a positive active material layer disposed on the positive current collector; and a negative electrode including a negative current collector, a negative active material layer disposed on the negative current collector, and a negative electrode functional layer disposed on the negative active material layer, wherein the positive active material layer includes a first positive active material including at least one of a composite oxide of metal selected from cobalt, manganese, nickel, and a combination thereof and lithium and a second positive active material including at least one of compounds represented by Chemical Formula 1 to Chemical Formula 4, and the negative electrode functional layer includes flake-shaped polyethylene particles and Lix2Mn1-y2M′y2A2  [Chemical Formula 1]Lix2Mn1-y2M′yO2-z2Xz2  [Chemical Formula 2]Lix2Mn2O4-z2Xz2  [Chemical Formula 3]Lix2Mn2-y2M′y2M″z2A4  [Chemical Formula 4]