Patent ID: 9601756
Date: 2017-03-21
CPC Classifications: C01G,C01P,H01M,Y02E,Y02T

Claim:
1. A high energy density lithium secondary battery comprising: a cathode comprising: a first cathode active material represented by Formula 1 below and having a layered structure, wherein the first cathode active material has an average particle diameter with respect to capacity of 0.03 to 0.1 μm/mAh, and a powder conductivity of 1×10 a second cathode active material represented by Formula 2 below and having a spinel structure, wherein the second cathode active material has an average particle diameter with respect to capacity of 0.1 to 0.2 μm/mAh, and a powder conductivity of 1×10 wherein an amount of the first cathode active material is between 50 and 90 wt % based on a total weight of the first and second cathode active materials; an anode comprising: crystalline graphite and amorphous carbon as anode active materials, wherein an amount of the crystalline graphite is between 40 and 100 wt % based on a total weight of the anode active materials; and a separator, wherein 0.8<x≦1.3, 0≦v≦0.9, 0≦w≦0.9, 0≦y≦0.9, 0≦z≦0.9 x+v+w+y+z=2, and 0≦t<0.2; M refers to at least one metal or transition metal cation having an oxidation number of +2 to +4; and A is a monovalent or divalent anion, wherein 0.8<a≦1.3, 0≦b≦0.5, and 0≦c0.3; M′ refers to at least one metal or transition metal cation having an oxidation number of +2 to +4; and A′ is a monovalent or divalent anion.