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    Secondary battery containing an organic polymer electrode additive capable of oxidation-reduction reaction
    2.
    发明授权
    Secondary battery containing an organic polymer electrode additive capable of oxidation-reduction reaction 有权

    公开(公告)号：US12057579B2

    公开(公告)日：2024-08-06

    申请号：US17325250

    申请日：2021-05-20

    申请人： Jae Kwang Kim

    发明人： Jae Kwang Kim

    IPC分类号： H01M4/00 ,  H01M4/505 ,  H01M4/525 ,  H01M4/60 ,  H01M4/62 ,  H01M4/02

    CPC分类号： H01M4/604 ,  H01M4/505 ,  H01M4/525 ,  H01M4/625 ,  H01M2004/028

    摘要： Inorganic-based lithium mixed electrode materials have a low charge transfer rate and thus have poor fast charging or discharging characteristics. Positive electrode active materials include LCO (lithium cobalt oxide, LiCoO2), NCM (nickel cobalt manganese, Li(NiCoMn)O2), NCA(nickel cobalt aluminum, Li(NiCoAl)O2), LMO(lithium manganese oxide, LiMn2O4), LFP(Lithium iron phosphate, LiFePO4), etc. High nickel technology is attracting attention because if nickel is used a lot, the capacity of lithium ions can be increased. However, as the content of nickel increases, the reactivity increases, resulting in a risk of explosion of the battery and deterioration in cycle life characteristics. As the negative active material, carbon, transition metal oxide, nickel metal, silicon-nickel alloy, and the like may be used. As the carbon, natural graphite, artificial graphite, soft carbon, hard carbon, etc. can be used. As the transition metal oxide, Co3O4, CoO, FeO, NiO, and the like can be used.
    The present invention adds a polymer additive containing free radicals in the molecular structure to the electrode to solve the problems of the existing secondary battery. The polymer additive contains free radicals and undergoes an oxidation-reduction reaction through ionic interactions. When this polymer additive is included in the electrode, the fast charging and fast discharging characteristics are improved, and the stability of the electrode is improved. When the stability of the electrode is improved, the cycle life characteristics of the electrode are improved. Because the polymer additive participates in the electrochemical reaction, it increases the practical capacity of nickel. When dissolved in a solvent, the polymer additive can increase the viscosity and act as a binder.

    Battery Cell and Battery Module Including the Same
    5.
    发明公开
    Battery Cell and Battery Module Including the Same 审中-公开

    公开(公告)号：US20230207811A1

    公开(公告)日：2023-06-29

    申请号：US17941256

    申请日：2022-09-09

    申请人： SK On Co., Ltd.

    发明人： Chang Mook Hwang ,  Jong Hyeok Lee ,  Yoon Ji Jo

    IPC分类号： H01M4/60 ,  H01M4/62 ,  H01M50/211 ,  H01M50/46 ,  H01M50/521

    CPC分类号： H01M4/604 ,  H01M4/625 ,  H01M50/211 ,  H01M50/46 ,  H01M50/521 ,  H01M2004/021

    摘要： A battery cell includes a case provided with an accommodation space; and an electrode assembly accommodated in the accommodation space and contacting the case. The electrode assembly includes a negative electrode including a plurality of negative electrode current collectors, on which a negative electrode mixture is coated, and a deformation absorbing member interposed between the plurality of negative electrode current collectors; a positive electrode including a positive electrode current collector on which a positive electrode mixture is coated; and a separator interposed between the negative electrode mixture and the positive electrode mixture. The deformation absorbing member may be interposed between surfaces, opposing a surface on which the negative electrode mixture is coated, of the negative electrode current collector and may be pressurized or stretched by at least one of the negative electrode and the positive electrode to contract or expand.