Title:
LITHIUM SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2023/059070
Kind Code:
A1
Abstract:
The present invention relates to a lithium secondary battery comprising: an anode including an anode active material; a cathode including a cathode active material; a separator interposed between the anode and the cathode; and an electrolyte, wherein the anode active material includes silicon particles, the cathode active material includes a lithium manganese-based oxide represented by [chemical formula 1], the Si depth of charge, represented by the following formula (1), is 30% to 60%, and the Si depth of discharge, represented by the following formula (2), is 10% or more. Formula (1): Si depth of charge (%) = {(cathode loading amount + anode pre-lithiation capacity)/anode loading amount} ×100, and Formula (2): Si depth of discharge (%) = {(cathode loading amount + anode pre-lithiation capacity - discharge loading amount) /anode loading amount} ×100, wherein in formulae (1) and (2), the cathode loading amount is the capacity per unit area of the cathode (unit: mAh/cm2), the anode loading amount is the capacity per unit area of the anode (unit: mAh/cm2), the anode pre-lithiation capacity is the capacity per unit area of lithium (Li) intercalated into the anode by pre-lithiation (unit: mAh/cm2), and the discharge loading amount is a value obtained by dividing the discharge capacity of the secondary battery by the cathode area at the discharge cut-off voltage.
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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/KR2022/015006
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 | |||
| KR20220127249A | 2022-09-19 |
Attorney, Agent or Firm:
BAE, KIM & LEE IP (KR)
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