• Patent Title: Positive electrode for lithium secondary battery, preparation method thereof, and lithium secondary battery including same
  • Application No.: US16621752
    Application Date: 2018-07-11
  • Publication No.: US11769877B2
    Publication Date: 2023-09-26
  • Inventor: Joo Sung LeeHo June KimMin Ji Heo
  • Applicant: LG Chem, Ltd.
  • Applicant Address: KR Seoul
  • Assignee: LG Chem, Ltd.
  • Current Assignee: LG Chem, Ltd.
  • Current Assignee Address: KR Seoul
  • Agency: Lerner David LLP
  • Priority: KR 20170090244 2017.07.17
  • International Application: PCT/KR2018/007877 2018.07.11
  • International Announcement: WO2019/017643A 2019.01.24
  • Date entered country: 2019-12-12
  • Main IPC: H01M4/525
  • IPC: H01M4/525 H01M4/505 H01M10/0525 H01M4/02
Positive electrode for lithium secondary battery, preparation method thereof, and lithium secondary battery including same
Abstract:
The present invention provides a positive electrode for a lithium secondary battery, including a first positive electrode active material including a lithium cobalt-based oxide, and a second positive electrode active material including a lithium composite transition metal oxide containing at least two selected from the group consisting of nickel (Ni), cobalt (Co), and manganese (Mn), wherein, when the state of charge (SOC) of the first positive electrode active material in which the voltage of the lithium secondary battery reaches a constant voltage (CV) at 1 C-rate is referred to as SOC1, and the state of charge (SOC) of the second positive electrode active material in which the voltage of the battery reaches a constant voltage (CV) at 1 C-rate is referred to as SOC2, the SOC1 and the SOC2 satisfy the relationship represented by Equation 1 below.

SOC1
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