公开(公告)号：US20240258583A1

公开(公告)日：2024-08-01

申请号：US18426372

申请日：2024-01-30

Applicant: HONDA MOTOR CO., LTD.

Inventor： Kazuki SAIMEN

IPC: H01M10/42 ,  H01M4/02 ,  H01M4/134 ,  H01M4/38 ,  H01M10/0525 ,  H01M50/449 ,  H01M50/489

CPC classification number: H01M10/4235 ,  H01M4/134 ,  H01M4/382 ,  H01M10/0525 ,  H01M50/449 ,  H01M50/489 ,  H01M2004/027

Abstract: The lithium metal secondary battery of the present invention includes an electrode stack formed by stacking a positive electrode and a negative electrode having a negative electrode current collector with a separator interposed therebetween, and an electrolyte solution, in which lithium is deposited on the negative electrode current collector during charging and dissolved during discharging; the separator includes a porous membrane and a porous conductive coat layer stacked on at least part of the surface of the porous membrane on the side of the negative electrode, in which the electrical conductivity of the porous conductive coat layer is within the range of 1.0×101 to 1.0×105 S/cm, and the surface resistivity of the porous conductive coat layer is 200 Ω/cm2 or less.

公开(公告)号：US20230307646A1

公开(公告)日：2023-09-28

申请号：US18170562

申请日：2023-02-17

Applicant: HONDA MOTOR CO., LTD.

Inventor： Kazuki SAIMEN

IPC: H01M4/62 ,  H01M10/0525 ,  H01M4/13 ,  H01M4/36 ,  H01M4/38 ,  H01M4/40

CPC classification number: H01M4/62 ,  H01M10/0525 ,  H01M4/13 ,  H01M4/366 ,  H01M4/382 ,  H01M4/405 ,  H01M2004/028

Abstract: To provide a lithium secondary battery including a positive electrode, a negative electrode and an electrolytic solution, wherein the positive electrode includes an interlayer and a positive electrode mixture layer sequentially stacked on a positive electrode current collector, and the interlayer contains a pre-doping agent, a conductive aid and a binder.

公开(公告)号：US20220263067A1

公开(公告)日：2022-08-18

申请号：US17666574

申请日：2022-02-08

Applicant: HONDA MOTOR CO., LTD.

Inventor： Kazuki SAIMEN

IPC: H01M4/36 ,  H01M10/0525

Abstract: Provided is a positive electrode including: a positive electrode current collector; and a positive electrode material mixture layer, the positive electrode material mixture layer including a positive electrode active material and dielectric particles, the positive electrode having a peak pore diameter smaller than or equal to the median diameter of the dielectric particles. Also provided is an electricity storage device including: the positive electrode; a negative electrode; and an electrolytic solution.

公开(公告)号：US20250006909A1

公开(公告)日：2025-01-02

申请号：US18675171

申请日：2024-05-28

Applicant: HONDA MOTOR CO., LTD.

Inventor： Kazuki SAIMEN

IPC: H01M4/38 ,  H01M4/02 ,  H01M4/04 ,  H01M4/66 ,  H01M10/0525

Abstract: A negative electrode for a lithium metal secondary battery according to an embodiment of the present invention includes a negative electrode current collector, and a lithium-containing metal layer disposed on at least one surface of the negative electrode current collector, at least a part of a surface of the lithium-containing metal layer has an uneven shape, the surface has a developed area ratio Sdr of 1.0 or more, and the surface is coated with an antioxidant film.

公开(公告)号：US20230075536A1

公开(公告)日：2023-03-09

申请号：US17822800

申请日：2022-08-29

Applicant: HONDA MOTOR CO., LTD.

Inventor： Kazuki SAIMEN

IPC: H01M4/62 ,  H01M10/0525 ,  H01M10/0585 ,  H01M4/38 ,  H01M4/40

Abstract: There is provided a lithium metal secondary battery including a positive electrode, a negative electrode, and a solid electrolyte layer between the positive electrode and the negative electrode, the negative electrode including a negative electrode current collector and a protective layer, and the protective layer including a metal capable of being alloyed with lithium and having a volumetric capacity density of 1000 mAh/L or more.

公开(公告)号：US20220166061A1

公开(公告)日：2022-05-26

申请号：US17598904

申请日：2019-03-29

Applicant: HONDA MOTOR CO., LTD.

Inventor： Takeshi FUJINO ,  Kazuki SAIMEN ,  Kazuaki MATSUMOTO

IPC: H01M10/0562 ,  H01M10/0525

Abstract: Provided are an electrode for a lithium-ion secondary battery enabling the realization of a battery that has a high volume energy density and exhibits a low level of degradation in output due to repeated charging and discharging even in a case in which the amount of an electrolyte solution held by the electrode is low, and a lithium-ion secondary battery including the positive electrode.
The coexistence of a high dielectric oxide solid and a highly concentrated electrolyte solution in a gap between articles of an active material inside the electrode is achieved.

公开(公告)号：US20220166052A1

公开(公告)日：2022-05-26

申请号：US17455408

申请日：2021-11-17

Applicant: HONDA MOTOR CO., LTD.

Inventor： Kazuki SAIMEN

IPC: H01M10/0525 ,  H01M4/36 ,  H01M4/04 ,  H01M4/62 ,  H01M4/583

Abstract: Provided is an electrode that is for use in lithium-ion secondary batteries, makes lithium-ion secondary batteries less vulnerable to a decline in capacity during charge and discharge cycles, and allows lithium-ion secondary batteries to have high durability to charge and discharge cycles. The electrode for use in lithium-ion secondary batteries includes an electrode material mixture layer including an electrode active material and a high-dielectric inorganic solid, in which the electrode active material has a surface site in contact with the high-dielectric inorganic solid and has another surface site to be in contact with an electrolytic solution, and the high-dielectric inorganic solid is a Na- or Mg-based high-dielectric inorganic solid.

公开(公告)号：US20230317934A1

公开(公告)日：2023-10-05

申请号：US18190138

申请日：2023-03-27

Applicant: HONDA MOTOR CO., LTD.

Inventor： Kazuki SAIMEN ,  Ken BABA

IPC: H01M4/38 ,  H01M50/46 ,  H01M4/04 ,  H01M10/0525

CPC classification number: H01M4/382 ,  H01M50/46 ,  H01M4/0445 ,  H01M10/0525 ,  H01M2004/027

Abstract: A lithium-metal secondary battery, which includes a highly reduction-resistant electrolytic solution, including 2 to 6 mol of electrolyte per L of solvent and also having a lithium deposition dissolution efficiency of 98.5% or more, which lithium deposition dissolution efficiency is the proportion of the amount of redissolution of lithium to the amount thereof deposited on the copper surface, wherein the relative density of a lithium metal layer in a negative electrode is 40 to 85%. In addition, a lithium-metal secondary battery, which includes a highly oxidation-resistant electrolytic solution, including 2 to 6 mol of electrolyte per L of solvent and also having a voltage of 5.5 V or more when the current density is 0.4 mA/cm2 using lithium as a counter electrode and platinum as a working electrode, wherein the relative density of a lithium metal layer in a negative electrode is 70 to 95%.

公开(公告)号：US20220166059A1

公开(公告)日：2022-05-26

申请号：US17455659

申请日：2021-11-18

Applicant: HONDA MOTOR CO., LTD.

Inventor： Kazuki SAIMEN

IPC: H01M10/0562 ,  H01M10/0525 ,  H01M4/133 ,  H01M4/1393

Abstract: Provided are graphite material particles that are for use in lithium-ion secondary batteries, make lithium-ion secondary batteries less vulnerable to an increase in internal resistance during charge and discharge cycles, and allow lithium-ion secondary batteries to have high durability to charge and discharge cycles. The graphite material particles for use in a lithium-ion secondary battery each have a structure including: a graphite particle; and a high-dielectric inorganic solid located in and integrated with the graphite particle. The high-dielectric inorganic solid preferably has at least one ion conductivity selected from Li ion conductivity, Na ion conductivity, and Mg ion conductivity, and preferably has an ionic conductivity of 10−7 S/cm or more and a relative permittivity of 10 or more when in the form of a powder.

公开(公告)号：US20210210758A1

公开(公告)日：2021-07-08

申请号：US17056765

申请日：2019-05-13

Applicant: HONDA MOTOR CO., LTD.

Inventor： Kazuki SAIMEN ,  Takeshi FUJINO ,  Yusuke OKAMOTO

IPC: H01M4/583 ,  H01M10/0525 ,  H01M4/04 ,  H01M4/62 ,  H01M10/0568

Abstract: Provided are composite particles, a method for producing composite particles, a lithium ion secondary battery electrode, and a lithium ion secondary battery, that can realize a lithium ion secondary battery having an excellent durability and having a large capacity due to a reduction in internal resistance. A lithium ion secondary battery comprises: a positive electrode provided with a positive electrode active material layer containing a positive electrode active material and a conduction auxiliary agent; a negative electrode provided with a negative electrode active material layer containing a negative electrode active material and a conduction auxiliary agent. At least one of the positive electrode active material layer and the negative electrode active material layer contains a conduction auxiliary agent-lithium ion conductive inorganic solid electrolyte composite in which at least a portion of the surface of a lithium ion conductive inorganic solid electrolyte is coated by a conduction auxiliary agent.