Title:
NEGATIVE ELECTRODE, AND SECONDARY BATTERY COMPRISING NEGATIVE ELECTRODE
Document Type and Number:
WIPO Patent Application WO/2023/163522
Kind Code:
A1
Abstract:
The present invention discloses a negative electrode and a secondary battery, and the negative electrode comprises a negative electrode active material layer comprising a negative electrode active material and a conductive material, wherein the negative electrode active material comprises a silicone-based negative electrode active material, and the conductive material comprises a carbon nanotube structure having a plurality of single-walled carbon nanotube monomers coupled together side by side, the average length of the carbon nanotube structure ranging from 2 μm to 20 μm. Among the carbon nanotube structures observed to have an average length of 2 μm to 20 μm when the surface of the negative electrode active material layer is examined at a magnification of 20,000 through a scanning electron microscope (SEM), 60 carbon nanotube structures are selected, and when an A value defined by [Formula 1] is measured for each of the selected carbon nanotube structures, an average A value, calculated by arithmetically averaging 50 of the A values after excluding the top 5 values and the bottom 5 values among the measured A values, is 70 to 100. [Formula 1] A = {Straight line distance between two ends of the carbon nanotube structure (P) / total length of the carbon nanotube structure (Q)}×100
Inventors:
MOON IL JAE (KR)
PARK JOO HO (KR)
KIM WOO HA (KR)
YOON SUNG SOO (KR)
PARK JOO HO (KR)
KIM WOO HA (KR)
YOON SUNG SOO (KR)
Application Number:
PCT/KR2023/002598
Publication Date:
August 31, 2023
Filing Date:
February 23, 2023
Export Citation:
Assignee:
LG ENERGY SOLUTION LTD (KR)
International Classes:
H01M4/62; C01B32/159; H01M4/134; H01M4/38; H01M10/052
Foreign References:
| KR20210015714A | 2021-02-10 | |||
| KR20190093174A | 2019-08-08 | |||
| KR20210023760A | 2021-03-04 | |||
| KR20190043957A | 2019-04-29 | |||
| KR20200137189A | 2020-12-09 |
Attorney, Agent or Firm:
BAE, KIM & LEE IP (KR)
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