Title:
LITHIUM COMPOSITE NEGATIVE ELECTRODE ACTIVE MATERIAL, NEGATIVE ELECTRODE COMPRISING SAME AND METHODS FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2020/153690
Kind Code:
A1
Abstract:
A method for manufacturing negative electrode active material, of the present invention, comprises the steps of: manufacturing a pellet by extruding a mixture of lithium metal and negative electrode active material; immersing the pellet in an electrolyte comprising an SEI film-forming additive; and manufacturing the pellet into powder form by grinding, washing and drying same. A negative electrode and a lithium rechargeable battery, of the present invention, manufactured using the lithium-active material powder have an SEI film which is uniformly formed by having lithium uniformly doped in the negative electrode, and during initial charging, the SEI film is stably formed, and thus an effect is achieved whereby the initial efficiency of the lithium rechargeable battery is improved.
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Inventors:
KIM YE RI (KR)
WOO SANG WOOK (KR)
CHAE OH BYONG (KR)
WOO SANG WOOK (KR)
CHAE OH BYONG (KR)
Application Number:
PCT/KR2020/000969
Publication Date:
July 30, 2020
Filing Date:
January 20, 2020
Export Citation:
Assignee:
LG CHEMICAL LTD (KR)
International Classes:
H01M4/36; B22F1/102; B22F9/04; H01M4/133; H01M4/134; H01M4/1393; H01M4/1395; H01M4/38; H01M4/587; H01M4/62; H01M10/052
Foreign References:
| JPH05266883A | 1993-10-15 | |||
| JP2008016192A | 2008-01-24 | |||
| KR20160121564A | 2016-10-19 | |||
| KR20180177044A | ||||
| KR20160145605A | 2016-12-20 | |||
| KR20190007734A | 2019-01-23 |
Other References:
See also references of EP 3793009A4
Attorney, Agent or Firm:
KIM, Hong Gyun (KR)
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