Patent ID: 9634356
Date: 2017-04-25
CPC Classifications: H01M,Y02E,Y02T

Claim:
1. A lithium secondary battery, comprising: an electrode assembly comprising a cathode, an anode, and a polymer membrane disposed between the cathode and the anode, and an electrolyte, wherein the cathode comprises a spinel-structure lithium metal oxide represented by Formula (1) below: wherein 0.9≦x≦1.2, 0<y<2, and 0≦z≦0.2; M is at least one element selected from the group consisting of Al, Mg, Ni, Co, Fe, Cr, V, Ti, Cu, B, Ca, Zn, Zr, Nb, Mo, Sr, Sb, W, Ti, and Bi, and A is at least one monovalent or divalent anion, wherein 0.5≦a≦3 and 1≦b≦2.5, wherein the electrolyte comprises: a non-aqueous solvent, and a lithium salt, wherein the non-aqueous solvent comprises an anion receptor, a cyclic carbonate, and a linear solvent, wherein an amount of the cyclic carbonate is in a range of 1 wt % to 30 wt % based on a total weight of the non-aqueous solvent, where in the anion receptor is a silylborate-based compound, and wherein an amount of the anion receptor is in a range of 0.1 wt % to 0.5 wt % based on a total weight of the electrolyte, wherein the linear solvent is a mixture of EMC and DMC.