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    Sacrificial Positive Electrode Material With Reduced Gas Generation And Method For Preparing Same
    2.
    发明公开
    Sacrificial Positive Electrode Material With Reduced Gas Generation And Method For Preparing Same 审中-公开

    公开(公告)号：US20230331583A1

    公开(公告)日：2023-10-19

    申请号：US18004743

    申请日：2022-02-18

    Applicant: LG Energy Solution, Ltd.

    Inventor： Tae Gu Yoo ,  Wang Mo Jung ,  Chi Ho Jo ,  Ji Hye Kim ,  Hae Jung Jung ,  Jong Wook Heo

    IPC: C01G51/00 ,  H01M10/052

    CPC classification number: C01G51/42 ,  C01G51/006 ,  H01M10/052 ,  C01P2004/61 ,  C01P2006/40

    Abstract: Provided are a sacrificial positive electrode material with a reduced gas generation amount and a method of preparing the same. The method includes calcinating a raw material mixture of lithium oxide (Li2O) and cobalt oxide (CoO) to prepare a lithium cobalt metal oxide, wherein the lithium oxide (Li2O) has an average particle size (D50) of 50 µm or less, and the resulting sacrificial positive electrode material has an electrical conductivity of 1 × 10-4 S/cm or more. The method of preparing a sacrificial positive electrode material can reduce the generation of gas, particularly, oxygen (O2) gas, in an electrode assembly during charging of a battery by adjusting the electrical conductivity of the sacrificial positive electrode material within a specific range using lithium oxide that satisfies a specific size, and thus the stability and lifespan of the battery including the same can be effectively enhanced.

    Sacrificial Positive Electrode Material with Reduced Gas Generation and Method of Preparing Thereof
    4.
    发明申请
    Sacrificial Positive Electrode Material with Reduced Gas Generation and Method of Preparing Thereof 有权

    公开(公告)号：US20230128140A1

    公开(公告)日：2023-04-27

    申请号：US17915607

    申请日：2022-02-09

    Applicant: LG Energy Solution, Ltd.

    Inventor： Tae Gu Yoo ,  Wang Mo Jung ,  Chi Ho Jo ,  Ji Hye Kim ,  Hae Jung Jung ,  Jong Wook Heo

    IPC: H01M4/62

    Abstract: A disclosure sacrificial positive electrode material with reduced gas generation and a method of preparing the same are disclosed herein. In some embodiments, a method includes calcining a mixture of lithium oxide (Li2O) and cobalt oxide (CoO) in an atmosphere containing an inert gas and oxygen gas and having a relative humidity of 20% or less, wherein the oxygen gas is at a partial pressure of 1% or less, to prepare a lithium cobalt metal oxide represented by Chemical Formula (1): LixCo(1-y)MyO4-zAz  [Chemical Formula 1] M is at least one selected from the group consisting of Ti, Al, Zn, Zr, Mn and Ni, A is a halogen, x, y and z are 5≤x≤7, 0≤y≤0.4, and 0≤z≤0.001. A battery having the sacrificial positive electrode material can have reduced gas generation in the electrode assembly at the time of charging the battery, and thus the stability and life of the battery are improved.

    Sacrificial Positive Electrode Material and Lithium Secondary Battery Comprising the Same
    5.
    发明申请
    Sacrificial Positive Electrode Material and Lithium Secondary Battery Comprising the Same 有权

    公开(公告)号：US20230115280A1

    公开(公告)日：2023-04-13

    申请号：US17914928

    申请日：2022-02-10

    Applicant: LG Energy Solution, Ltd.

    Inventor： Tae Gu Yoo ,  Wang Mo Jung ,  Chi Ho Jo ,  Ji Hye Kim ,  Hae Jung Jung ,  Jong Wook Heo

    IPC: H01M4/525 ,  H01M4/505 ,  H01M4/62

    Abstract: A sacrificial positive electrode material, a positive electrode comprising the same, and a lithium secondary battery having the positive electrode are disclosed herein. In some embodiments, a sacrificial positive electrode material includes a lithium cobalt oxide represented by the following Chemical Formula 1, wherein the sacrificial positive electrode active material has a defect formation energy of metal (M) of −4.0 to −8.5 eV, calculated using density functional theory (DFT): LixCo(1-y)MyO4   [Chemical Formula 1] M is at least one selected from the group consisting of Al, Fe, Zn, Ti, W, Mg, Ge and Si, pa x and y are 5≤x≤7 and 0.05≤y≤0.6. When the defect formation energy of the metal is controlled within a specific range, a high initial charging/discharging efficiency is realized during initial charging/discharging, and the amount of gas additionally generated at the later time of charging/discharging is reduced. Thus, stability and the charging/discharging performance of a battery is improved.

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