Title:
LITHIUM SECONDARY BATTERY COMPRISING SI-BASED NEGATIVE ELECTRODE ACTIVE MATERIAL
Document Type and Number:
WIPO Patent Application WO/2023/243833
Kind Code:
A1
Abstract:
Provided is a lithium secondary battery having reduced Hi-pot defects and improved capacity retention. The lithium secondary battery according to one aspect of to the present invention comprises: a negative electrode; a positive electrode; and a separator interposed between the negative electrode and the positive electrode, wherein the negative electrode includes a Si-based negative electrode active material, the separator is provided with a separator substrate having a plurality of pores and including a polyolefin resin, the polydispersity index (PDI) of the polyolefin resin is 2.5 to 4.2, the average particle diameter of the pores is 20 to 40 nm, and the maximum particle diameter of the pores is at most 50 nm.
Inventors:
BAE KYEONG HUI (KR)
LEE SO YEONG (KR)
JEONG SO MI (KR)
BAE WON SIK (KR)
LEE SO YEONG (KR)
JEONG SO MI (KR)
BAE WON SIK (KR)
Application Number:
PCT/KR2023/004414
Publication Date:
December 21, 2023
Filing Date:
March 31, 2023
Export Citation:
Assignee:
LG ENERGY SOLUTION LTD (KR)
International Classes:
H01M50/417; H01M4/02; H01M4/36; H01M4/38; H01M4/48; H01M4/587; H01M10/052; H01M50/449; H01M50/489; H01M50/494
Foreign References:
| KR20200106880A | 2020-09-15 | |||
| KR20180113517A | 2018-10-16 | |||
| JP2012501357A | 2012-01-19 | |||
| KR20220032502A | 2022-03-15 | |||
| JPH11123799A | 1999-05-11 |
Attorney, Agent or Firm:
IPCJ PATENT & LAW FIRM (KR)
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