公开(公告)号：US20220263089A1

公开(公告)日：2022-08-18

申请号：US17729236

申请日：2022-04-26

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Yohei MOMMA ,  Teruaki OCHIAI ,  Mayumi MIKAMI ,  Jyo SAITOU

IPC: H01M4/525 ,  C01G51/00 ,  C01G53/00 ,  H01M4/505 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569

Abstract: A positive electrode active material, which has higher capacity and excellent charge and discharge cycle performance, for a lithium-ion secondary battery is provided. The positive electrode active material includes lithium, cobalt, magnesium, oxygen, and fluorine; when a pattern obtained by powder X ray diffraction using a CuKα1 ray is subjected to Rietveld analysis, the positive electrode active material has a crystal structure having a space group R-3m, a lattice constant of an a-axis is greater than 2.814×10(−10th power) m and less than 2.817×10(−10th power) m, and a lattice constant of a c-axis is greater than 14.05×10(−10th power) m and less than 14.07×10(−10th power) m; and in analysis by X-ray photoelectron spectroscopy, a relative value of a magnesium concentration is higher than or equal to 1.6 and lower than or equal to 6.0 with the cobalt concentration regarded as 1.

公开(公告)号：US20220246931A1

公开(公告)日：2022-08-04

申请号：US17727300

申请日：2022-04-22

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Yohei MOMMA ,  Teruaki OCHIAI ,  Mayumi MIKAMI ,  Jyo SAITOU

IPC: H01M4/525 ,  C01G51/00 ,  C01G53/00 ,  H01M4/505 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569

Abstract: A positive electrode active material, which has higher capacity and excellent charge and discharge cycle performance, for a lithium-ion secondary battery is provided. The positive electrode active material includes lithium, cobalt, magnesium, oxygen, and fluorine; when a pattern obtained by powder X ray diffraction using a CuKα1 ray is subjected to Rietveld analysis, the positive electrode active material has a crystal structure having a space group R-3m, a lattice constant of an a-axis is greater than 2.814×10(−10th power) m and less than 2.817×10(−10th power) m, and a lattice constant of a c-axis is greater than 14.05×10(−10th power) m and less than 14.07×10(−10th power) m; and in analysis by X-ray photoelectron spectroscopy, a relative value of a magnesium concentration is higher than or equal to 1.6 and lower than or equal to 6.0 with the cobalt concentration regarded as 1.

公开(公告)号：US20200259183A1

公开(公告)日：2020-08-13

申请号：US16861306

申请日：2020-04-29

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Tatsuya IKENUMA ,  Takahiro KAWAKAMI ,  Yohei MOMMA ,  Teruaki OCHIAI

IPC: H01M4/62 ,  H01M10/052 ,  H01M4/139 ,  H01M4/04

Abstract: In manufacture of a storage battery electrode containing graphene as a conductive additive, the efficiency of reduction of graphene oxide under mild conditions is increased, and cycle characteristics and rate characteristics of a storage battery are improved. Provided is a manufacturing method of a storage battery electrode. In the manufacturing method, a first mixture containing an active material, graphene oxide, and a solvent is formed; a reducing agent is added to the first mixture and the graphene oxide is reduced to form a second mixture; a binder is mixed with the second mixture to form a third mixture; and the third mixture is applied to a current collector and the solvent is evaporated to form an active material layer.

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：US20180102536A1

公开(公告)日：2018-04-12

申请号：US15726520

申请日：2017-10-06

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takahiro KAWAKAMI ,  Teruaki OCHIAI ,  Yohei MOMMA ,  Ayae TSURUTA ,  Masahiro TAKAHASHI ,  Mayumi MIKAMI

IPC: H01M4/36 ,  H01M4/525 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/62 ,  H01G11/60 ,  H01G11/50

CPC classification number: H01M4/366 ,  H01G11/24 ,  H01G11/50 ,  H01G11/60 ,  H01G11/86 ,  H01M4/0471 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62 ,  H01M4/628 ,  H01M10/0525 ,  H01M2004/028

Abstract: Provided is a positive electrode active material which suppresses a reduction in capacity due to charge and discharge cycles when used in a lithium ion secondary battery. A covering layer is formed by segregation on a superficial portion of the positive electrode active material. The positive electrode active material includes a first region and a second region. The first region exists in an inner portion of the positive electrode active material. The second region exists in a superficial portion of the positive electrode active material and part of the inner portion thereof. The first region includes lithium, a transition metal, and oxygen. The second region includes magnesium, fluorine, and oxygen.

公开(公告)号：US20160190578A1

公开(公告)日：2016-06-30

申请号：US14757444

申请日：2015-12-23

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Junpei MOMO ,  Takahiro KAWAKAMI ,  Yohei MOMMA

IPC: H01M4/505 ,  H01M10/0525

CPC classification number: H01M4/505 ,  C01G45/1228 ,  C01G53/56 ,  C01P2002/32 ,  H01M4/131 ,  H01M4/364 ,  H01M10/0525 ,  Y02E60/122

Abstract: An object is to provide a storage battery using materials for an electrode active material without waste. Another object is to provide an electrode active material with an appropriate compounding ratio. A lithium-ion storage battery includes a positive electrode, a negative electrode, and an electrolytic solution therebetween. The positive electrode includes a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer includes a first positive electrode active material and a second positive electrode active material. The charge capacity of the first positive electrode active material is higher than the discharge capacity thereof. The discharge capacity of the second positive electrode active material is higher than the charge capacity thereof. The first positive electrode active material may be a lithium-manganese composite oxide, and the second positive electrode active material may be a lithium-manganese oxide with a spinel crystal structure.

Abstract translation: 本发明的目的是提供一种使用不含废物的电极活性材料的材料的蓄电池。 另一个目的是提供一种具有合适配合比例的电极活性材料。 锂离子蓄电池包括正极，负极和它们之间的电解液。 正极包括正极集电体和正极活性物质层。 正极活性物质层包括第一正极活性物质和第二正极活性物质。 第一正极活性物质的充电容量高于其放电容量。 第二正极活性物质的放电容量高于其充电容量。 第一正极活性物质可以是锂锰复合氧化物，第二正极活性物质可以是具有尖晶石晶体结构的锂锰氧化物。

公开(公告)号：US20160164089A1

公开(公告)日：2016-06-09

申请号：US15040051

申请日：2016-02-10

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takahiro KAWAKAMI ,  Shuhei YOSHITOMI ,  Teruaki OCHIAI ,  Yumiko SAITO ,  Yohei MOMMA ,  Satoshi SEO ,  Mayumi MIKAMI ,  Shunsuke ADACHI

IPC: H01M4/505 ,  H01M4/525 ,  H01M10/0525

CPC classification number: H01M4/505 ,  H01B1/08 ,  H01M4/362 ,  H01M4/525 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/028 ,  H01M2220/20 ,  H01M2220/30 ,  Y02E60/122

Abstract: The amount of lithium ions that can be received and released in and from a positive electrode active material is increased, and high capacity and high energy density of a secondary battery are achieved. Provided is a lithium-manganese composite oxide represented by LixMnyMzOw, where M is a metal element other than Li and Mn, or Si or P, and y, z, and w satisfy 0≦x/(y+z) 0, z>0, 0.26≦(y+z)/w

公开(公告)号：US20160118666A1

公开(公告)日：2016-04-28

申请号：US14885583

申请日：2015-10-16

Applicant: Semiconductor Energy Laboratory Co., LTD.

Inventor： Tatsuya IKENUMA ,  Takahiro KAWAKAMI ,  Yohei MOMMA ,  Teruaki OCHIAI

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

CPC classification number: H01M4/625 ,  H01M4/0404 ,  H01M4/139 ,  H01M4/621 ,  H01M4/623 ,  H01M10/052 ,  H01M2220/30 ,  Y02E60/122 ,  Y02P70/54

Abstract: In manufacture of a storage battery electrode containing graphene as a conductive additive, the efficiency of reduction of graphene oxide under mild conditions is increased, and cycle characteristics and rate characteristics of a storage battery are improved. Provided is a manufacturing method of a storage battery electrode. In the manufacturing method, a first mixture containing an active material, graphene oxide, and a solvent is formed; a reducing agent is added to the first mixture and the graphene oxide is reduced to form a second mixture; a binder is mixed with the second mixture to form a third mixture; and the third mixture is applied to a current collector and the solvent is evaporated to form an active material layer.

Abstract translation: 在制造含有石墨烯作为导电添加剂的蓄电池电极的情况下，在温和条件下氧化石墨烯的还原效率提高，蓄电池的循环特性和速率特性提高。 提供一种蓄电池电极的制造方法。 在制造方法中，形成含有活性物质，石墨烯氧化物和溶剂的第一混合物， 向第一混合物中加入还原剂，还原氧化石墨烯以形成第二混合物; 将粘合剂与第二混合物混合以形成第三混合物; 并将第三混合物施加到集电器上，并蒸发溶剂以形成活性物质层。

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：US20250158054A1

公开(公告)日：2025-05-15

申请号：US19023705

申请日：2025-01-16

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Jyo SAITO ,  Mayumi MIKAMI ,  Yohei MOMMA ,  Teruaki OCHIAI ,  Tatsuyoshi TAKAHASHI ,  Kazuhei NARITA

IPC: H01M4/525 ,  H01M4/02 ,  H01M4/36 ,  H01M10/0525 ,  H01M10/0569

Abstract: A positive electrode active material that has high capacity and excellent charge and discharge cycle performance for a secondary battery is provided. A positive electrode active material that inhibits a decrease in capacity in charge and discharge cycles is provided. A high-capacity secondary battery is provided. A secondary battery with excellent charge and discharge characteristics is provided. A highly safe or reliable secondary battery is provided. A positive electrode active material contains lithium, cobalt, oxygen, and aluminum and has a crystal structure belonging to a space group R-3m when Rietveld analysis is performed on a pattern obtained by powder X-ray diffraction. In analysis by X-ray photoelectron spectroscopy, the number of aluminum atoms is less than or equal to 0.2 times the number of cobalt atoms.