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公开(公告)号：US12113203B2
公开(公告)日：2024-10-08
申请号：US17254516
申请日：2019-07-04
Applicant: LG CHEM, LTD.
Inventor： Oh Byong Chae , Sang Wook Woo , Ye Ri Kim
IPC: H01M4/1395 , H01M4/04 , H01M4/133 , H01M4/134 , H01M4/1393 , H01M4/36 , H01M4/38 , H01M4/485 , H01M4/58 , H01M10/04 , H01M10/0525 , H01M10/058 , H01M4/02
CPC classification number: H01M4/1395 , H01M4/0445 , H01M4/0469 , H01M4/133 , H01M4/134 , H01M4/1393 , H01M4/364 , H01M4/366 , H01M4/382 , H01M4/485 , H01M4/58 , H01M10/049 , H01M10/0525 , H01M10/058 , H01M2004/027
Abstract: A negative electrode for a lithium secondary battery, a negative electrode in which the negative electrode is pre-lithiated, a method of manufacturing the negative electrode, and a lithium secondary battery including the negative electrode. The pre-lithiated negative electrode may increase the capacity and improve the electrochemical performance of a lithium secondary battery by securing the initial reversibility of a negative electrode.
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公开(公告)号：US11522198B2
公开(公告)日：2022-12-06
申请号：US16303011
申请日：2017-09-29
Applicant: LG CHEM, LTD.
Inventor： Hee Won Choi , Sang Wook Woo , Oh Byong Chae , Eun Kyung Kim
IPC: H01M4/66 , H01M4/134 , H01M4/1395 , H01M4/80 , H01M4/38 , H01M4/04 , H01M10/052 , H01M4/02
Abstract: A negative electrode for a lithium-metal secondary battery, which has a wide specific surface area and a current density distribution that can be uniformly implemented, and a lithium-metal secondary battery including the same.
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3.发明申请
公开(公告)号：US20190010057A1
公开(公告)日：2019-01-10
申请号：US15748747
申请日：2017-01-13
Applicant: LG Chem, Ltd.
Inventor： Sun Young Shin , Su Min Lee , Oh Byong Chae , Eun Kyung Kim
IPC: C01B32/182 , H01M4/587 , H01M10/0525 , C01D15/08 , C01D7/00
Abstract: The present invention relates to a negative electrode active material for a lithium secondary battery, which comprises graphite having an alkali carbonate layer formed on a surface thereof, wherein the graphite has an ID/IG ratio of 0.05 to 0.3 in Raman spectroscopy, and a method of preparing the same, wherein, since the negative electrode active material for a lithium secondary battery of the present invention includes the graphite having an alkali carbonate layer formed on the surface thereof, the alkali carbonate layer contributes to the formation of a stable solid electrolyte interface (SEI) to reduce a side reaction with an electrolyte solution including propylene carbonate. Thus, since low-temperature performance and initial efficiency of the lithium secondary battery may be improved, the negative electrode active material for a lithium secondary battery of the present invention is suitable for the preparation of the lithium secondary battery.
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公开(公告)号：US12155029B2
公开(公告)日：2024-11-26
申请号：US17255453
申请日：2020-01-20
Applicant: LG CHEM, LTD.
Inventor： Ye Ri Kim , Sang Wook Woo , Oh Byong Chae
IPC: H01M10/0525 , B22F1/102 , B22F9/04 , H01M4/02 , H01M4/04 , H01M4/36 , H01M4/38 , H01M4/583 , H01M10/0567 , H01M10/0568 , H01M10/0569
Abstract: A method for manufacturing negative electrode active material including the steps of manufacturing a pellet by extruding a mixture of lithium metal and negative electrode active material, immersing the pellet in an electrolyte comprising an SEI film-forming additive, and manufacturing the pellet into powder form by grinding, washing and drying same. A negative electrode and a lithium rechargeable battery manufactured using the lithium-active material powder has an SEI film that is uniformly formed by having lithium uniformly doped in the negative electrode. During initial charging, the SEI film is stably formed, and thus an effect is achieved whereby the initial efficiency of the lithium rechargeable battery is improved.
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5.发明授权
公开(公告)号：US11837718B2
公开(公告)日：2023-12-05
申请号：US16642751
申请日：2018-10-11
Applicant: LG CHEM, LTD.
Inventor： Jun Hyuk Song , Oh Byong Chae , Eun Kyung Kim , Sang Wook Woo
CPC classification number: H01M4/366 , H01M4/133 , H01M4/134 , H01M4/364 , H01M4/382 , H01M4/386 , H01M4/483 , H01M4/587 , H01M10/0525 , H01M2004/021 , H01M2004/027
Abstract: A negative electrode for a lithium secondary battery and a lithium secondary battery including the negative electrode are disclosed. The negative electrode includes a negative electrode current collector, a first negative electrode active material layer present on the negative electrode current collector, and a second negative electrode active material layer present on the first negative electrode active material layer. The first negative electrode active material layer includes two or more kinds of first negative electrode active materials, and the second negative electrode active material layer includes a second negative electrode active material having swelling that is smaller than that of the first negative electrode active material layer. Therefore, the surface of the negative electrode does not exhibit deformation during pre-lithiation.
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公开(公告)号：US11799085B2
公开(公告)日：2023-10-24
申请号：US17252080
申请日：2019-09-11
Applicant: LG CHEM, LTD.
Inventor： Oh Byong Chae , Sang Wook Woo , Ye Ri Kim
IPC: H01M4/587 , H01M4/133 , H01M4/134 , H01M4/1393 , H01M4/1395 , H01M10/0525 , H01M10/0567 , H01M4/02
CPC classification number: H01M4/587 , H01M4/133 , H01M4/134 , H01M4/1393 , H01M4/1395 , H01M10/0525 , H01M10/0567 , H01M2004/027 , H01M2004/028
Abstract: A method of manufacturing a negative electrode for a lithium secondary battery, the method includes forming a negative electrode active material layer on a negative electrode current collector to manufacture a negative electrode assembly, and pre-lithiating the negative electrode assembly. The pre-lithiating of the negative electrode assembly includes a first pre-lithiation step of performing pre-lithiation by impregnating the negative electrode assembly with a first pre-lithiation solution and a second pre-lithiation step of performing pre-lithiation by impregnating the negative electrode assembly with a second pre-lithiation solution after the first pre-lithiation step. The first pre-lithiation solution includes an ionizable first lithium salt, a first organic solvent, and a first additive. The second pre-lithiation solution includes an ionizable second lithium salt, a second organic solvent, and a second additive.
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公开(公告)号：US11456446B2
公开(公告)日：2022-09-27
申请号：US17040405
申请日：2020-01-30
Applicant: LG CHEM, LTD.
Inventor： Ye Ri Kim , Sang Wook Woo , Oh Byong Chae
IPC: H01M4/04 , H01M4/36 , H01M10/0525 , H01M4/02
Abstract: A method for pre-lithiation of a negative electrode for a secondary battery, for reducing the time required for pre-lithiation and reducing changes in volume of the electrode. The method includes immersing a negative electrode for a secondary battery in the electrolyte to perform electrolyte impregnation, and pre-lithiating the negative electrode. Immersing the negative electrode for the secondary battery in an electrolyte includes introducing the prepared negative electrode into an electrolyte bath containing the electrolyte, and removing air bubbles and moisture in the negative electrode by applying a vacuum to the electrolyte bath in which the negative electrode is immersed.
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8.发明授权
公开(公告)号：US11329312B2
公开(公告)日：2022-05-10
申请号：US16500276
申请日：2017-12-29
Applicant: LG CHEM, LTD.
Inventor： Oh Byong Chae , Yoon Ah Kang , Jun Hyuk Song , Eun Kyung Kim , Sang Wook Woo
Abstract: A pre-lithiation apparatus that pre-lithiates a negative electrode structure having a first surface on which a negative electrode is disposed to produce a negative electrode unit of a battery, the apparatus includes a first roll rotatable to wind or unwind the negative electrode structure before the pre-lithiation is performed, a second roll installed to be spaced apart from the first roll and rotatable to wind and collect the negative electrode structure, on which the pre-lithiation is performed, and a lithium roll crossing a direction in which the negative electrode structure is transferred from the first roll to the second roll to come into contact with at least one of a first surface and a second surface of the negative electrode structure while being transferred from the first roll to the second roll. The lithium roll includes a lithium foil and an elastic member.
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公开(公告)号：US10804539B2
公开(公告)日：2020-10-13
申请号：US16303039
申请日：2017-09-29
Applicant: LG CHEM, LTD.
Inventor： Hee Won Choi , Sang Wook Woo , Oh Byong Chae , Eun Kyung Kim
IPC: H01M4/62 , H01M4/04 , H01M4/134 , H01M4/1395 , H01M4/36 , H01M4/38 , H01M10/052 , H01M10/42 , H01M4/1399 , H01M4/137 , H01M4/02 , H01M10/04
Abstract: A negative electrode for a lithium-metal secondary battery and a lithium-metal secondary battery including the same are provided which have an excellent life characteristic and have less irregular resin phases formed on the surface the negative electrode. The negative electrode includes a polymer layer arranged in a lattice structure having vacant spaces, so that the specific surface area of the negative electrode can be increased, a uniform current density distribution can thereby be achieved, the negative electrode has excellent life characteristics, and the formation of irregular resin phases can be suppressed.
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公开(公告)号：US20200295358A1
公开(公告)日：2020-09-17
申请号：US16494458
申请日：2018-07-11
Applicant: LG Chem, Ltd.
Inventor： Oh Byong Chae , Sang Wook Woo , Eun Kyung Kim , Yoon Ah Kang , Jun Hyuk Song
IPC: H01M4/36 , H01M10/052 , H01M4/38 , H01M4/62 , H01M4/48
Abstract: The present invention relates to a negative electrode for a secondary battery which comprises a negative electrode collector, a negative electrode active material layer formed on the negative electrode collector, and a lithium metal layer, wherein an adhesive layer is disposed between the negative electrode active material layer and the lithium metal layer, and the lithium metal layer comprises lithium and metal oxide in a weight ratio of 50:50 to 99:1.
