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1. (WO2013157867) LITHIUM SECONDARY BATTERY HAVING IMPROVED RATE CHARACTERISTICS

Pub. No.:    WO/2013/157867    International Application No.:    PCT/KR2013/003294
Publication Date: Fri Oct 25 01:59:59 CEST 2013 International Filing Date: Fri Apr 19 01:59:59 CEST 2013
IPC: H01M 10/0569
H01M 4/525
H01M 4/485
H01M 10/052
Applicants: LG CHEM, LTD.
주식회사 엘지화학
Inventors: JEON, Jong Ho
전종호
KIM, Yoo Seok
김유석
YANG, Doo Kyung
양두경
KIM, Shulkee
김슬기
Title: LITHIUM SECONDARY BATTERY HAVING IMPROVED RATE CHARACTERISTICS
Abstract:
The present invention relates to a lithium secondary battery having improved rate characteristics, and more particularly, to a lithium secondary battery having a positive electrode, a negative electrode, and a separation membrane and an electrolyte interposed between the positive electrode and the negative electrode, wherein the electrolyte contains a mixed solvent of a ring-shaped carbonate material and a propionate material, the positive electrode contains lithium-manganese composite oxide expressed by the following chemical formula 1 as an active material, and the negative electrode contains lithium metal oxide expressed by the following chemical formula 2 as an active material. LixMyMn2-yO4-zAz (1) (In the formula, 0.9≤x≤1.2, 0