公开(公告)号：US20230327207A1

公开(公告)日：2023-10-12

申请号：US18141841

申请日：2023-05-01

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Nobuhiro INOUE ,  Masaki YAMAKAJI ,  Jun ISHIKAWA ,  Kazuhei NARITA

IPC: H01M10/0568 ,  H01M4/36 ,  H01M4/587 ,  H01M4/38 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/054

CPC classification number: H01M10/0568 ,  H01M4/366 ,  H01M4/587 ,  H01M4/364 ,  H01M4/38 ,  H01M4/386 ,  H01M4/625 ,  H01M10/0525 ,  H01M10/054 ,  H01M2004/021

Abstract: A storage battery includes positive and negative electrodes and an electrolytic solution. The negative electrode includes a first element and carbon. The first element is any of silicon, tin, gallium, aluminum, germanium, lead, antimony, bismuth, silver, zinc, cadmium, and indium. The negative electrode includes an active material and a first layer in contact with a surface of the active material. The first layer has a thickness of 10 nm to 1000 nm inclusive. The electrolytic solution contains first and second cations. The first cation is one or more of a lithium ion, a sodium ion, a calcium ion, and a magnesium ion. The second cation is an imidazolium cation or a tertiary sulfonium cation.

公开(公告)号：US20180287160A1

公开(公告)日：2018-10-04

申请号：US16001467

申请日：2018-06-06

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Masaki YAMAKAJI ,  Kuniharu NOMOTO

IPC: H01M4/62 ,  H01M4/1397 ,  H01M4/134 ,  H01M4/136 ,  H01M4/04 ,  H01M4/58

Abstract: The positive electrode active material layer includes a plurality of particles of a positive electrode active material and a reaction mixture where reduced graphene oxide is bonded to a polymer having a functional group as a side chain. The reduced graphene oxide has a sheet-like shape and high conductivity and thus functions as a conductive additive by being in contact with the plurality of particles of the positive electrode active material. The reaction mixture serves as an excellent binder since the reduced graphene oxide is bonded to the polymer. Therefore, even a small amount of the reaction mixture where the reduced graphene oxide is eovalently bonded to the polymer excellently serves as a conductive additive and a binder.

公开(公告)号：US20180123132A1

公开(公告)日：2018-05-03

申请号：US15856951

申请日：2017-12-28

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takahiro KAWAKAMI ,  Masaki YAMAKAJI

IPC: H01M4/58 ,  H01M10/0525 ,  B60L11/18 ,  B82Y30/00 ,  H01M4/136 ,  H01M4/1397 ,  H01M10/04 ,  H01M4/02

CPC classification number: H01M4/5825 ,  B60L11/18 ,  B82Y30/00 ,  H01M4/136 ,  H01M4/1397 ,  H01M10/0436 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/028 ,  H01M2220/20 ,  Y02E60/122 ,  Y02P70/54 ,  Y02T10/7011

Abstract: An object is to improve the characteristics of a power storage device such as a charging and discharging rate or a charge and discharge capacity. The grain size of particles of a positive electrode active material is nano-sized so that a surface area per unit mass of the active material is increased. Specifically, the grain size is set to greater than or equal to 10 nm and less than or equal to 100 nm, preferably greater than or equal to 20 nm and less than or equal to 60 nm. Alternatively, the surface area per unit mass is set to 10 m2g or more, preferably 20 m2/g or more. Further, the crystallinity of the active material is increased by setting an XRD half width to greater than or equal to 0.12° and less than 0.17°, preferably greater than or equal to 0.13° and less than 0.16°.

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：US20130156942A1

公开(公告)日：2013-06-20

申请号：US13710497

申请日：2012-12-11

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Masaki YAMAKAJI ,  Rika Yatabe ,  Hiroatsu Todoriki

IPC: H01M4/04

CPC classification number: H01M4/0404 ,  H01M4/139 ,  H01M4/1391 ,  H01M4/1397 ,  H01M4/623 ,  H01M4/625 ,  Y02E60/122 ,  Y02P70/54

Abstract: To provide a positive electrode for a lithium-ion secondary battery, which is highly filled with a positive electrode active material and has a high-density positive electrode active material layer. To provide a lithium-ion secondary battery having high capacity and improved cycle characteristics with use of the positive electrode. After graphene oxide is dispersed in a dispersion medium, a positive electrode active material is added and mixed to form a mixture. A binder is added to the mixture and mixed to form a positive electrode paste. The positive electrode paste is applied to a positive electrode current collector and the dispersion medium contained in the positive electrode paste is evaporated, and then, the graphene oxide is reduced, so that a positive electrode active material layer containing graphene is formed over the positive electrode current collector.

Abstract translation: 为了提供高纯度的正极活性物质并具有高密度正极活性物质层的锂离子二次电池用正极。 使用正极来提供具有高容量和改进的循环特性的锂离子二次电池。 将氧化石墨烯分散在分散介质中后，加入正极活性物质并混合形成混合物。 向混合物中加入粘合剂并混合以形成正极浆料。 将正极浆料涂布在正极集电体上，使正极浆料中所含的分散介质蒸发，然后氧化石墨烯被还原，从而在正极上形成含有石墨烯的正极活性物质层 集电器

公开(公告)号：US20250118802A1

公开(公告)日：2025-04-10

申请号：US18981953

申请日：2024-12-16

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Yumiko YONEDA ,  Masaki YAMAKAJI ,  Ryota TAJIMA ,  Masaaki HIROKI

IPC: H01M10/0565 ,  H01M4/02 ,  H01M4/13 ,  H01M10/04 ,  H01M10/052 ,  H01M10/0585 ,  H01M50/119 ,  H01M50/121 ,  H01M50/122 ,  H01M50/124

Abstract: A gel electrolyte and a separator are provided between the positive electrode current collector and the negative electrode current collector. The plurality of positive electrode current collectors and the plurality of negative electrode current collectors are stacked such that surfaces of negative electrodes with which active material layers are not coated or surfaces of positive electrodes with which active material layers are not coated are in contact with each other.

公开(公告)号：US20220115668A1

公开(公告)日：2022-04-14

申请号：US17556384

申请日：2021-12-20

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Hiroatsu TODORIKI ,  Mikio YUKAWA ,  Yumiko SAITO ,  Masaki YAMAKAJI ,  Rika YATABE ,  Tatsuya IKENUMA

IPC: H01M4/62 ,  H01M4/36 ,  H01M10/052 ,  H01M4/136 ,  H01M4/58 ,  C01B32/23

Abstract: A graphene oxide used as a raw material of a conductive additive for forming an active material layer with high electron conductivity with a small amount of a conductive additive is provided. A positive electrode for a nonaqueous secondary battery using the graphene oxide as a conductive additive is provided. The graphene oxide is used as a raw material of a conductive additive in a positive electrode for a nonaqueous secondary battery and, in the graphene oxide, the atomic ratio of oxygen to carbon is greater than or equal to 0.405.

公开(公告)号：US20210408593A1

公开(公告)日：2021-12-30

申请号：US17468766

申请日：2021-09-08

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Yumiko YONEDA ,  Masaki YAMAKAJI ,  Ryota TAJIMA ,  Masaaki HIROKI

IPC: H01M10/0565 ,  H01M4/02 ,  H01M4/13 ,  H01M10/04 ,  H01M10/052 ,  H01M10/0585

Abstract: A gel electrolyte and a separator are provided between the positive electrode current collector and the negative electrode current collector. The plurality of positive electrode current collectors and the plurality of negative electrode current collectors are stacked such that surfaces of negative electrodes with which active material layers are not coated or surfaces of positive electrodes with which active material layers are not coated are in contact with each other.

公开(公告)号：US20210151758A1

公开(公告)日：2021-05-20

申请号：US17160735

申请日：2021-01-28

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takahiro KAWAKAMI ,  Masaki YAMAKAJI

IPC: H01M4/58 ,  B82Y30/00 ,  H01M4/136 ,  H01M4/1397 ,  H01M10/0525 ,  B60L50/64 ,  H01M10/04

Abstract: An object is to improve the characteristics of a power storage device such as a charging and discharging rate or a charge and discharge capacity. The grain size of particles of a positive electrode active material is nano-sized so that a surface area per unit mass of the active material is increased. Specifically, the grain size is set to greater than or equal to 10 nm and less than or equal to 100 nm, preferably greater than or equal to 20 nm and less than or equal to 60 nm. Alternatively, the surface area per unit mass is set to 10 m2/g or more, preferably 20 m2/g or more, further, the crystallinity of the active material is increased by setting an XRD half width to greater than or equal to 0.12° and less than 0.17°, preferably greater than or equal to 0.13° and less than 0.16°.

公开(公告)号：US20200280101A1

公开(公告)日：2020-09-03

申请号：US16875094

申请日：2020-05-15

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Nobuhiro INOUE ,  Masaki YAMAKAJI ,  Jun ISHIKAWA ,  Kazuhei NARITA

IPC: H01M10/0568 ,  H01M4/36 ,  H01M4/587 ,  H01M4/38 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/054

Abstract: A storage battery includes positive and negative electrodes and an electrolytic solution. The negative electrode includes a first element and carbon. The first element is any of silicon, tin, gallium, aluminum, germanium, lead, antimony, bismuth, silver, zinc, cadmium, and indium. The negative electrode includes an active material and a first layer in contact with a surface of the active material. The first layer has a thickness of 10 nm to 1000 nm inclusive. The electrolytic solution contains first and second cations. The first cation is one or more of a lithium ion, a sodium ion, a calcium ion, and a magnesium ion. The second cation is an imidazolium cation or a tertiary sulfonium cation.