Patent ID: 8597833
Filing Date: 2013-12-03
Classification: H01M,Y02E

Abstract:
1. A rechargeable lithium battery comprising: a negative electrode comprising a composite negative active material of a metal or a semi-metal and a carbonaceous material; a positive electrode comprising a mixed positive active material of about 90 to about 99 wt % of a first positive active material selected from the group consisting of cobalt, manganese, phosphate-based materials, or combinations thereof, and about 1 to about 10 wt % of a nickel-based second positive active material; and a non-aqueous electrolyte; wherein the metal or the semi-metal is one metal, semi-metal or alloy selected from the group consisting of Si, an Si-T alloy, where T is an element selected from an alkali metal, an alkaline-earth metal, a group 13 element, a group 14 element, a transition element, a rare earth element, or combinations thereof, and is not Si, Sn, a Sn—Z alloy, where Z is an element selected from an alkali metal, an alkaline-earth metal, a group 13 element, a group 14 element, a transition element, a rare earth element, or combinations thereof and is not Sn, and combination thereof; and wherein the second positive active material is a compound represented by the following Formulae 10 or 11: wherein 0.8≦g≦2, 0≦h≦1, e is from 1 to 2, 0≦j≦1, 0≦h+j≦1, and L is selected from Al, Mn, Mg, Zr, La, or combinations thereof, wherein, 0.65≦x≦1, 0≦y≦1, 0≦z≦1, 0≦y+z≦1, q ranges from 1.8 to 2, 0≦y+z≦1, and L′ is selected from Al, Mn, Mg, Zr, La, or combinations thereof.