Patent number: 10170796
Abstract: Disclosed is a lithium secondary battery with improved rate characteristics. More particularly, disclosed is a lithium secondary battery including a cathode, an anode, a separator disposed between the cathode and the anode, and an electrolyte, wherein the electrolyte includes a mixed solvent of a cyclic carbonate-based material and a propionate-based material, the cathode includes a lithium manganese composite oxide represented by Formula 1 below as a cathode active material, and the anode includes a lithium metal oxide represented by Formula 2 below as an anode active material: LixMyMn2-yO4-zAz??(1) 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. LiaM?bO4-cAc??(2) wherein M? is at least one element selected from the group consisting of Ti, Sn, Cu, Pb, Sb, Zn, Fe, In, Al, and Zr; 0.1?a?4 and 0.
Type:
Grant
Filed:
July 30, 2015
Date of Patent:
January 1, 2019
Assignee:
LG Chem, Ltd.
Inventors:
Jong Ho Jeon, Yoo Seok Kim, Doo Kyung Yang, Shulkee Kim