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    POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, METHOD FOR PRODUCING SAME, AND LITHIUM SECONDARY BATTERY COMPRISING SAME
    6.
    发明申请
    POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, METHOD FOR PRODUCING SAME, AND LITHIUM SECONDARY BATTERY COMPRISING SAME 有权

    公开(公告)号：US20220384788A1

    公开(公告)日：2022-12-01

    申请号：US17769984

    申请日：2021-01-12

    Applicant: LG ENERGY SOLUTION, LTD.

    Inventor： Seungbo YANG ,  Eui Tae KIM ,  Kwonnam SOHN

    IPC: H01M4/36 ,  H01M4/38 ,  H01M4/583 ,  H01M10/0525 ,  H01M4/04

    Abstract: A positive electrode active material having a core/shell structure, which includes a sulfur-carbon composite containing thermally expanded-reduced graphene oxide, a carbon material as a core, and carbon nanotubes as a shell. A method for preparing a positive electrode active material having a core/shell structure for a lithium secondary battery, including the steps of thermally expanding graphene oxide by heat treatment at a temperature in a range of 300° C. to 500° C. to prepare a thermally-expanded graphene oxide. Then, reducing the thermally-expanded graphene oxide by heat treatment at a temperature in a range of 700° C. to 1200° C. to prepare a thermally expanded-reduced graphene oxide. Next, mixing the thermally expanded-reduced graphene oxide and sulfur to prepare a sulfur-carbon composite. Last, mixing the sulfur-carbon composite and carbon nanotubes to form carbon nanotubes on a surface of the sulfur-carbon composite.

    POSITIVE ELECTRODE SLURRY, POSITIVE ELECTRODE MANUFACTURED USING SAME, AND LITHIUM-SULFUR BATTERY COMPRISING SAME
    9.
    发明申请
    POSITIVE ELECTRODE SLURRY, POSITIVE ELECTRODE MANUFACTURED USING SAME, AND LITHIUM-SULFUR BATTERY COMPRISING SAME 有权

    公开(公告)号：US20230050935A1

    公开(公告)日：2023-02-16

    申请号：US17792103

    申请日：2021-09-10

    Applicant: LG ENERGY SOLUTION, LTD.

    Inventor： Mijin LEE ,  Eun Kyoung PARK ,  Dongseok SHIN ,  Kwonnam SOHN

    IPC: H01M4/36 ,  H01M10/052 ,  H01M4/583 ,  H01M50/46 ,  H01M4/58

    Abstract: The present disclosure relates to a positive electrode slurry for a lithium-sulfur battery including a positive electrode active material, an electrically conductive material, a binder and a solvent, where the ratio of the average particle diameter (D50) of the positive electrode active material and the positive electrode slurry is 1.5 or less, and the phase angle at 1 Hz of the positive electrode slurry is 50° or more. The positive electrode slurry for the lithium-sulfur battery of the present disclosure exhibits excellent flowability even while having a high solid content, thereby making it possible to manufacture a positive electrode for a lithium-sulfur battery with excellent electrochemical properties and improving the productivity and economic feasibility of the manufacturing process of the positive electrode for the lithium-sulfur battery.

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