Title:
CYLINDRICAL LITHIUM SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2024/136549
Kind Code:
A1
Abstract:
The present invention relates to a cylindrical lithium secondary battery comprising: an electrode assembly in which a cathode plate, an anode plate, and a separator interposed between the cathode plate and the anode plate are wound in one direction; a battery can that accommodates the electrode assembly; an electrolyte injected into the battery can; and a sealing body for sealing an open end portion of the battery can, wherein: each of the cathode plate and the anode plate includes an uncoated portion on which an active material layer is not formed, and has a structure in which the uncoated portion of the cathode plate and/or the uncoated portion of the anode plate defines an electrode tab; in the cylindrical lithium secondary battery, the form factor ratio is 0.4 or more, and the diameter of a core portion of the electrode assembly is 5 mm to 8 mm; the electrolyte comprises a lithium salt, an organic solvent and an additive; the additive comprises a compound represented by chemical formula 1, a cyclic carbonate compound, and 1,3-propane sultone; the compound represented by chemical formula 1 is included in an amount of 0.5 wt% to 5.0 wt% on the basis of the total amount of the electrolyte; and the compound represented by chemical formula 1, the cyclic carbonate compound and the 1,3-propane sultone are included in a weight ratio of 1:0.5:0.2 to 1:20:10.
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Inventors:
SHIN WON KYUNG (KR)
AHN KYOUNG HO (KR)
LEE JUNG HOON (KR)
LEE KWAN HEE (KR)
HAN JUN HYEOK (KR)
TAKEUCHI TAKASHI (KR)
CHOI JIN YI (KR)
KO HYEON MIN (KR)
AHN KYOUNG HO (KR)
LEE JUNG HOON (KR)
LEE KWAN HEE (KR)
HAN JUN HYEOK (KR)
TAKEUCHI TAKASHI (KR)
CHOI JIN YI (KR)
KO HYEON MIN (KR)
Application Number:
PCT/KR2023/021332
Publication Date:
June 27, 2024
Filing Date:
December 21, 2023
Export Citation:
Assignee:
LG ENERGY SOLUTION LTD (KR)
International Classes:
H01M10/0567; H01M4/36; H01M4/38; H01M4/48; H01M4/525; H01M4/587; H01M10/052; H01M10/0587; H01M50/107; H01M50/538
Attorney, Agent or Firm:
BAE, KIM & LEE IP (KR)
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