公开(公告)号：US20190296334A1

公开(公告)日：2019-09-26

申请号：US16436067

申请日：2019-06-10

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Junya GOTO ,  Mako MOTOYOSHI ,  Yuika SATO ,  Takahiro KAWAKAMI

IPC: H01M4/36 ,  H01M4/70 ,  H01M4/62 ,  H01M4/134 ,  H01M4/485 ,  H01M4/04 ,  H01M4/131 ,  H01M4/587 ,  H01M4/133

Abstract: A negative electrode and a secondary battery including the negative electrode are provided. A plurality of projections and depressions are provided in a negative electrode active material layer and a negative electrode current collector. The plurality of projections and depressions in the negative electrode active material layer absorb expansion of the negative electrode active material and suppress deformation thereof. The plurality of projections and depressions in the negative electrode current collector suppress deformation of the negative electrode current collector caused by expansion and contraction of the negative electrode active material.

公开(公告)号：US20150174790A1

公开(公告)日：2015-06-25

申请号：US14642079

申请日：2015-03-09

Applicant: Semiconductor Energy Laboratory Co., LTD.

Inventor： Masaki YAMAKAJI ,  Koji NARA ,  Mako MOTOYOSHI

IPC: B29B9/12 ,  B29B9/16

CPC classification number: B29B9/12 ,  B29B9/16 ,  B29K2105/251 ,  B29L2031/772 ,  C01B33/20 ,  C01B33/32 ,  H01M4/0471 ,  H01M4/136 ,  H01M4/366 ,  H01M4/5825 ,  H01M10/052 ,  Y02E60/122 ,  Y02P70/54 ,  Y02T10/7011 ,  Y10T428/2991

Abstract: In a manufacturing process of a positive electrode active material for a power storage device, which includes a lithium silicate compound represented by a general formula Li2MSiO4, heat treatment is performed at a high temperature on a mixture material, grinding treatment is performed, a carbon-based material is added, and then heat treatment is performed again. Therefore, the reactivity between the substances contained in the mixture material is enhanced, favorable crystallinity can be obtained, and further microparticulation of the grain size of crystal which is grown larger by the high temperature treatment and crystallinity recovery are achieved; and at the same time, carbon can be supported on the surfaces of particles of the crystallized mixture material. Accordingly, a positive electrode active material for a power storage device, in which electron conductivity is improved, can be manufactured.

Abstract translation: 在包含由通式Li 2 MSiO 4表示的硅酸锂化合物的蓄电装置用正极活性物质的制造方法中，在混合材料的高温下进行热处理，进行研磨处理， 添加基材，再次进行热处理。 因此，混合材料中所含的物质之间的反应性增强，可以获得良好的结晶度，并且通过高温处理和结晶回收实现了生长较大的晶体的晶粒尺寸的进一步的微粒化; 并且同时可以在结晶的混合物材料的颗粒的表面上负载碳。 因此，可以制造其中电子传导性提高的蓄电装置用正极活性物质。

公开(公告)号：US20240038966A1

公开(公告)日：2024-02-01

申请号：US18376988

申请日：2023-10-05

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takahiro KAWAKAMI ,  Masaki YAMAKAJI ,  Mako MOTOYOSHI ,  Rika YATABE

IPC: H01M4/1393 ,  H01M4/131 ,  H01M4/133 ,  H01M4/1391 ,  H01M4/36 ,  H01M4/62

CPC classification number: H01M4/1393 ,  H01M4/131 ,  H01M4/133 ,  H01M4/1391 ,  H01M4/364 ,  H01M4/625 ,  Y02E60/10

Abstract: A positive electrode for a nonaqueous secondary battery including an active material layer which has sufficient electron conductivity with a low ratio of a conductive additive is provided. A positive electrode for a nonaqueous secondary battery including an active material layer which is highly filled with an active material, id est, including the active material and a low ratio of a conductive additive. The active material layer includes a plurality of particles of an active material with a layered rock salt structure, graphene that is in surface contact with the plurality of particles of the active material, and a binder.

公开(公告)号：US20180366726A1

公开(公告)日：2018-12-20

申请号：US16114312

申请日：2018-08-28

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takahiro KAWAKAMI ,  Teruaki OCHIAI ,  Shuhei YOSHITOMI ,  Takuya HIROHASHI ,  Mako MOTOYOSHI ,  Yohei MOMMA ,  Junya GOTO

IPC: H01M4/505 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/36

Abstract: To increase capacity per weight of a power storage device, a particle includes a first region, a second region in contact with at least part of a surface of the first region and located on the outside of the first region, and a third region in contact with at least part of a surface of the second region and located on the outside of the second region. The first and the second regions contain lithium and oxygen. At least one of the first region and the second region contains manganese. At least one of the first and the second regions contains an element M. The first region contains a first crystal having a layered rock-salt structure. The second region contains a second crystal having a layered rock-salt structure. An orientation of the first crystal is different from an orientation of the second crystal.

公开(公告)号：US20160126541A1

公开(公告)日：2016-05-05

申请号：US14921126

申请日：2015-10-23

Applicant: Semiconductor Energy Laboratory Co., LTD.

Inventor： Junya GOTO ,  Mako MOTOYOSHI ,  Yuika SATO ,  Takahiro KAWAKAMI

IPC: H01M4/36 ,  H01M4/587 ,  H01M4/04 ,  H01M4/485 ,  H01M4/131 ,  H01M4/133

CPC classification number: H01M4/364 ,  H01M4/0445 ,  H01M4/131 ,  H01M4/133 ,  H01M4/134 ,  H01M4/485 ,  H01M4/587 ,  H01M4/625 ,  H01M4/70 ,  H01M2004/027

Abstract: A negative electrode and a secondary battery including the negative electrode are provided. A plurality of projections and depressions are provided in a negative electrode active material layer and a negative electrode current collector. The plurality of projections and depressions in the negative electrode active material layer absorb expansion of the negative electrode active material and suppress deformation thereof. The plurality of projections and depressions in the negative electrode current collector suppress deformation of the negative electrode current collector caused by expansion and contraction of the negative electrode active material.

Abstract translation: 设置负极和包含负极的二次电池。 在负极活性物质层和负极集电体中设置有多个凹凸。 负极活性物质层中的多个凹凸吸收负极活性物质的膨胀，抑制其变形。 负极集电体中的多个突起和凹陷抑制由负极活性物质的膨胀和收缩引起的负极集电体的变形。

公开(公告)号：US20230361290A1

公开(公告)日：2023-11-09

申请号：US18212440

申请日：2023-06-21

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takahiro KAWAKAMI ,  Teruaki OCHIAI ,  Shuhei YOSHITOMI ,  Takuya HIROHASHI ,  Mako MOTOYOSHI ,  Yohei MOMMA ,  Junya GOTO

IPC: H01M4/505 ,  H01M4/36 ,  H01M4/131 ,  H01M4/1391

CPC classification number: H01M4/505 ,  H01M4/366 ,  H01M4/131 ,  H01M4/1391 ,  H01M2220/30

Abstract: To increase capacity per weight of a power storage device, a particle includes a first region, a second region in contact with at least part of a surface of the first region and located on the outside of the first region, and a third region in contact with at least part of a surface of the second region and located on the outside of the second region. The first and the second regions contain lithium and oxygen. At least one of the first region and the second region contains manganese. At least one of the first and the second regions contains an element M. The first region contains a first crystal having a layered rock-salt structure. The second region contains a second crystal having a layered rock-salt structure. An orientation of the first crystal is different from an orientation of the second crystal.

公开(公告)号：US20180175386A1

公开(公告)日：2018-06-21

申请号：US15874123

申请日：2018-01-18

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takahiro KAWAKAMI ,  Tatsuya IKENUMA ,  Teruaki OCHIAI ,  Shuhei YOSHITOMI ,  Mako MOTOYOSHI ,  Hiroyuki MIYAKE ,  Yohei MOMMA ,  Takuya HIROHASHI ,  Satoshi SEO

IPC: H01M4/485 ,  H01M4/48 ,  G06F1/16 ,  H01M4/62 ,  H01M4/583 ,  H01M4/505 ,  G04G21/00 ,  H01M4/525 ,  H01M4/36 ,  H01M10/052

CPC classification number: H01M4/485 ,  G04C10/00 ,  G04G21/00 ,  G06F1/16 ,  G06F1/1626 ,  G06F1/163 ,  G06F1/1635 ,  G06F1/1652 ,  H01M4/366 ,  H01M4/483 ,  H01M4/505 ,  H01M4/525 ,  H01M4/583 ,  H01M4/623 ,  H01M4/625 ,  H01M10/052 ,  H01M2220/30

Abstract: A lithium-ion secondary battery with high capacity is provided. Alternatively, a lithium-ion secondary battery with unproved cycle characteristics is provided. To achieve this, an active material including a particle having a cleavage plane and a layer containing carbon covering at least part of the cleavage plane is provided. The particle having the cleavage plane contains lithium, manganese, nickel, and oxygen. The layer containing carbon preferably contains graphene. When a lithium-ion secondary battery is fabricated using an electrode including the particle having the cleavage plane at least part of which is covered with the layer containing carbon as an active material, the discharge capacity can be increased and the cycle characteristics can be improved.

公开(公告)号：US20160118658A1

公开(公告)日：2016-04-28

申请号：US14920650

申请日：2015-10-22

Applicant: Semiconductor Energy Laboratory Co., LTD.

Inventor： Takahiro KAWAKAMI ,  Teruaki OCHIAI ,  Shuhei YOSHITOMI ,  Takuya HIROHASHI ,  Mako MOTOYOSHI ,  Yohei MOMMA ,  Junya GOTO

IPC: H01M4/505 ,  H01M4/36

CPC classification number: H01M4/505 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/366 ,  H01M2220/30

Abstract: To increase capacity per weight of a power storage device, a particle includes a first region, a second region in contact with at least part of a surface of the first region and located on the outside of the first region, and a third region in contact with at least part of a surface of the second region and located on the outside of the second region. The first and the second regions contain lithium and oxygen. At least one of the first region and the second region contains manganese. At least one of the first and the second regions contains an element M. The first region contains a first crystal having a layered rock-salt structure. The second region contains a second crystal having a layered rock-salt structure. An orientation of the first crystal is different from an orientation of the second crystal.

Abstract translation: 为了增加蓄电装置的重量，颗粒包括第一区域，与第一区域的表面的至少一部分接触并位于第一区域的外部的第二区域和接触的第三区域 具有第二区域的表面的至少一部分并且位于第二区域的外侧。 第一和第二区域包含锂和氧。 第一区域和第二区域中的至少一个含有锰。 第一区域和第二区域中的至少一个包含元素M.第一区域包含具有层状岩盐结构的第一晶体。 第二区域包含具有层状岩盐结构的第二晶体。 第一晶体的取向与第二晶体的取向不同。

公开(公告)号：US20230041532A1

公开(公告)日：2023-02-09

申请号：US17969422

申请日：2022-10-19

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takahiro KAWAKAMI ,  Masaki YAMAKAJI ,  Mako MOTOYOSHI ,  Rika YATABE

IPC: H01M4/1393 ,  H01M4/131 ,  H01M4/133 ,  H01M4/1391 ,  H01M4/36 ,  H01M4/62

Abstract: A positive electrode for a nonaqueous secondary battery including an active material layer which has sufficient electron conductivity with a low ratio of a conductive additive is provided. A positive electrode for a nonaqueous secondary battery including an active material layer which is highly filled with an active material, id est, including the active material and a low ratio of a conductive additive. The active material layer includes a plurality of particles of an active material with a layered rock salt structure, graphene that is in surface contact with the plurality of particles of the active material, and a binder.

公开(公告)号：US20220352510A1

公开(公告)日：2022-11-03

申请号：US17852407

申请日：2022-06-29

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takahiro KAWAKAMI ,  Teruaki OCHIAI ,  Shuhei YOSHITOMI ,  Takuya HIROHASHI ,  Mako MOTOYOSHI ,  Yohei MOMMA ,  Junya GOTO

IPC: H01M4/505 ,  H01M4/131 ,  H01M4/36 ,  H01M4/1391

Abstract: To increase capacity per weight of a power storage device, a particle includes a first region, a second region in contact with at least part of a surface of the first region and located on the outside of the first region, and a third region in contact with at least part of a surface of the second region and located on the outside of the second region. The first and the second regions contain lithium and oxygen. At least one of the first region and the second region contains manganese. At least one of the first and the second regions contains an element M. The first region contains a first crystal having a layered rock-salt structure. The second region contains a second crystal having a layered rock-salt structure. An orientation of the first crystal is different from an orientation of the second crystal.