NEGATIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY COMPRISING SAME

WIPO Patent Application WO/2019/083330

A3

The present invention relates to a negative electrode active material for a lithium secondary battery, enabling the improvement of a reduced lifespan problem which may occur when using silicon-based particles for a negative electrode active material. The negative electrode active material comprises, for the entire 100 parts by weight of the negative electrode active material: 5-20 parts by weight of first carbon-based particles; 55-90 parts by weight of second carbon-based particles; and 1-40 parts by weight of silicon-based particles, wherein the specific surface area of the first carbon-based particles is 1.5 m2/g to 4.5 m2/g, the specific surface area of the second carbon-based particles is 0.4 m2/g to 1.5 m2/g, and the specific surface area of the first carbon-based particles is greater than that of the second carbon-based particles.

JP6711475	Convex exposed composite particles contained in composite particle group, negative electrode active material particle group, negative electrode, battery, and composite particle group
JP7206379	Negative electrode material and electrochemical device and electronic equipment containing the same
JP7318789	Electrodes and lithium-ion secondary batteries

LEE SU MIN (KR)
LEE YONG JU (KR)
KIM EUN KYUNG (KR)
JO RAE HWAN (KR)
KIM DONG HYUK (KR)
PARK SE MI (KR)

PCT/KR2018/012853

June 13, 2019

October 26, 2018

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LG CHEMICAL LTD (KR)

H01M4/36; H01M4/133; H01M4/134; H01M4/38; H01M4/587; H01M10/0525

KR20150032015A	2015-03-25
JP2014241302A	2014-12-25
KR20160084600A	2016-07-14
KR20170007140A	2017-01-18
KR20160023845A	2016-03-03

See also references of EP 3683871A4

BAE, KIM & LEE IP GROUP (KR)

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