公开(公告)号：US20240154171A1

公开(公告)日：2024-05-09

申请号：US18495767

申请日：2023-10-27

Applicant: HONDA MOTOR CO., LTD.

Inventor： Ken BABA ,  Takeshi FUJINO ,  Tomohiro KINOSHITA ,  Wataru HOSHIKAWA

IPC: H01M10/0568 ,  H01M10/052 ,  H01M10/0569

CPC classification number: H01M10/0568 ,  H01M10/052 ,  H01M10/0569 ,  H01M2300/0037

Abstract: The present invention provides an electrolytic solution comprising a lithium salt and an organic solvent, wherein the lithium salt has a concentration of 2.0 mol/L or more and 3.0 mol/L or less, the lithium salt comprises a first lithium salt and a second lithium salt, the first lithium salt is lithium bis(fluorosulfonyl)imide, and the second lithium salt is one or more selected from the group consisting of lithium hexafluorophosphate, lithium difluoro(oxalato)borate and lithium difluorophosphate.

公开(公告)号：US20230318041A1

公开(公告)日：2023-10-05

申请号：US18183962

申请日：2023-03-15

Applicant: HONDA MOTOR CO., LTD.

Inventor： Ken BABA ,  Takeshi FUJINO ,  Tomohiro KINOSHITA

IPC: H01M10/0569 ,  H01M10/0568 ,  H01M10/0567

CPC classification number: H01M10/0569 ,  H01M10/0568 ,  H01M10/0567 ,  H01M2300/0037

Abstract: To provide an electrolytic solution for lithium metal battery, which is capable of reducing the concentration of an electrolyte salt in an electrolytic solution and is excellent in safety and durability during charging/discharging. Disclosed is an electrolytic solution for lithium metal battery, comprising an organic solvent and an electrolyte salt, the electrolyte salt comprising a lithium salt, and the organic solvent comprising a first organic solvent having a vapor pressure at 25° C. of 0.003 MPa or more and having no flash point, and a second organic solvent having a vapor pressure at 25° C. of 0.007 MPa or less.

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：US20220109144A1

公开(公告)日：2022-04-07

申请号：US17449452

申请日：2021-09-29

Applicant: HONDA MOTOR CO., LTD.

Inventor： Ken BABA ,  Takeshi FUJINO

IPC: H01M4/36 ,  H01M4/60

Abstract: To provide a negative electrode for non-aqueous secondary battery, the negative electrode having excellent durability. A negative electrode for non-aqueous electrolyte secondary battery, wherein a multi-branched molecule is bonded to a surface of a negative electrode active material. Since direct contact of an electrolytic solution on a lithium insertion surface of a negative electrode active material is suppressed by disposing a multi-branched polymer on a surface of the negative electrode active material, it is possible to suppress decomposition of the electrolytic solution, whereby the growth of the SEI is suppressed.
Thereby, lithium consumption is reduced and long-term storage characteristics are improved, so that a non-aqueous electrolyte secondary battery having an improved capacity retention rate can be provided.

公开(公告)号：US20210305572A1

公开(公告)日：2021-09-30

申请号：US17200925

申请日：2021-03-15

Applicant: HONDA MOTOR CO., LTD.

Inventor： Ken BABA ,  Takeshi FUJINO

IPC: H01M4/60 ,  H01M10/0525

Abstract: To provide a negative electrode for a lithium ion secondary battery having more improved durability than conventionally, and a lithium ion secondary battery including the same.
A negative electrode for a lithium ion secondary battery including a negative electrode active material in which an organic molecule having a dielectric constant larger than that of an electrolyte solvent is chemically bonded, and a lithium ion secondary battery including the same.
Preferable examples of the organic molecule include a molecule having a relative dielectric constant of 90 or more at a frequency of 10 kHz, a molecule having a molecular structure that undergoes polarization in a single molecule or between molecules, a zwitter ion compound having a positive electric charge and a negative electric charge in one molecule, hydroxy acid, and a molecule having a molecular weight of 39 to 616.

公开(公告)号：US20230126067A1

公开(公告)日：2023-04-27

申请号：US17931903

申请日：2022-09-14

Applicant: HONDA MOTOR CO., LTD.

Inventor： Ken BABA ,  Takeshi FUJINO ,  Naoki SAKASHITA

IPC: H01M10/0565 ,  H01M10/0525

Abstract: Provided is a lithium metal secondary battery, including: a positive electrode; a negative electrode current collector; an electrolyte layer provided between the positive electrode and the negative electrode current collector; an intermediate layer provided between the positive electrode and the negative electrode current collector and including an expandable and contractible, three-dimensional structure; and an ionic liquid held within the expandable and contractible, three-dimensional structure.