Title:
LITHIUM SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2023/059072
Kind Code:
A1
Abstract:
The present invention relates to a lithium secondary battery comprising: an anode containing an anode active material; a cathode containing a cathode active material; a separator interposed between the anode and the cathode; and an electrolyte, wherein the anode active material contains silicon particles, and the Si charge depth represented by formula (1) below is 30% to 60% and the Si discharge depth represented by formula (2) is 10% or more. Equation (1): Si charge depth (%) = {(cathode loading amount + anode pre-lithiation capacity) /anode loading amount} × 100 Equation (2): Si discharge depth (%) = {(cathode loading amount + anode pre-lithiation capacity – discharge loading amount) /anode loading amount} × 100 In equations (1) and (2), cathode loading amount is the capacity (unit: mAh/cm2) per unit area of the cathode; anode loading amount (unit: mAh/cm2) is the capacity per unit area of the anode; anode pre-lithiation capacity (unit: mAh/cm2) is the capacity per unit area of lithium (Li) intercalated into the anode by pre-lithiation; and discharge loading amount is the value obtained by dividing the discharge capacity of the secondary battery by the area of the cathode at a discharge cut-off voltage.
Inventors:
PARK SEUNG WON (KR)
PARK HYUN WOO (KR)
KWON YO HAN (KR)
LEE JAE WOOK (KR)
JUN CHAN SOO (KR)
PARK HYUN WOO (KR)
KWON YO HAN (KR)
LEE JAE WOOK (KR)
JUN CHAN SOO (KR)
Application Number:
PCT/KR2022/015008
Publication Date:
April 13, 2023
Filing Date:
October 05, 2022
Export Citation:
Assignee:
LG ENERGY SOLUTION LTD (KR)
International Classes:
H01M10/42; H01M4/04; H01M4/1395; H01M4/38; H01M4/505; H01M4/525; H01M10/052
Domestic Patent References:
| WO2014073217A1 | 2014-05-15 |
Foreign References:
| KR20200089182A | 2020-07-24 | |||
| JP6511222B2 | 2019-05-15 | |||
| JP2016126976A | 2016-07-11 | |||
| JP2018179682A | 2018-11-15 | |||
| KR20210131946A | 2021-11-03 | |||
| KR20220127248A | 2022-09-19 |
Attorney, Agent or Firm:
BAE, KIM & LEE IP (KR)
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