公开(公告)号：US20180198130A1

公开(公告)日：2018-07-12

申请号：US15914612

申请日：2018-03-07

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

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

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

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.

公开(公告)号：US20180145368A1

公开(公告)日：2018-05-24

申请号：US15810989

申请日：2017-11-13

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

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

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

CPC classification number: H01M10/0525 ,  H01M4/02 ,  H01M4/366 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M2004/028 ,  Y02E60/13

Abstract: Positive electrode active material particles that inhibit a decrease in capacity due to charge and discharge cycles are provided. A high-capacity secondary battery, a secondary battery with excellent charge and discharge characteristics, or a highly-safe or highly-reliable secondary battery is provided. A novel material, active material particles, and a storage device are provided. The positive electrode active material particle includes a first region and a second region in contact with the outside of the first region. The first region contains lithium, oxygen, and an element M that is one or more elements selected from cobalt, manganese, and nickel. The second region contains the element M, oxygen, magnesium, and fluorine. The atomic ratio of lithium to the element M (Li/M) measured by X-ray photoelectron spectroscopy is 0.5 or more and 0.85 or less. The atomic ratio of magnesium to the element M (Mg/M) is 0.2 or more and 0.5 or less.

公开(公告)号：US20170237026A1

公开(公告)日：2017-08-17

申请号：US15583058

申请日：2017-05-01

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Yohei MOMMA ,  Tomohiko SUGANOYA ,  Saki OBANA

IPC: H01L51/00 ,  H01L27/32 ,  H01L51/52

CPC classification number: H01L51/0097 ,  H01L27/1225 ,  H01L27/32 ,  H01L27/3244 ,  H01L27/3258 ,  H01L33/52 ,  H01L51/5203 ,  H01L51/5237 ,  H01L51/524 ,  H01L51/5246 ,  H01L51/5253 ,  H01L51/56 ,  H01L2251/301 ,  H01L2251/5338 ,  H01L2924/0002 ,  Y02E10/549 ,  Y02P70/521 ,  H01L2924/00

Abstract: A light-emitting device having a curved light-emitting surface is provided. Further, a highly-reliable light-emitting device is provided. A substrate with plasticity is used. A light-emitting element is formed over the substrate in a flat state. The substrate provided with the light-emitting element is curved and put on a surface of a support having a curved surface. Then, a protective layer for protecting the light-emitting element is formed in the same state. Thus, a light-emitting device having a curved light-emitting surface, such as a lighting device or a display device can be manufactured.

公开(公告)号：US20170092929A1

公开(公告)日：2017-03-30

申请号：US15273131

申请日：2016-09-22

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Yohei MOMMA ,  Takahiro KAWAKAMI ,  Teruaki OCHIAI

IPC: H01M4/04 ,  H01M4/62

CPC classification number: H01M4/04 ,  H01M4/505 ,  H01M4/621 ,  H01M4/623 ,  H01M4/625 ,  H01M10/052 ,  H01M2220/30 ,  Y02E60/122 ,  Y02P70/54

Abstract: A storage battery electrode with high capacity is stably manufactured with the use of a strongly basic active material. The basicity of a mixture of a strongly basic active material and graphene oxide, the mixture subjected to heat treatment, or the mixture subjected to reduction by addition of a reducing agent is measured. Only in the case where the measured basicity falls within a predetermined range, a binder such as polyvinylidene fluoride (PVdF) is mixed to form a slurry. Thus, gelation of the binder can be prevented.

公开(公告)号：US20150255828A1

公开(公告)日：2015-09-10

申请号：US14636930

申请日：2015-03-03

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Junpei MOMO ,  Nobuhiro INOUE ,  Takahiro KAWAKAMI ,  Yohei MOMMA

IPC: H01M10/052 ,  H01M4/38 ,  H01M10/0585 ,  H01M4/583

CPC classification number: H01M10/052 ,  H01M4/133 ,  H01M4/134 ,  H01M4/382 ,  H01M4/386 ,  H01M4/583 ,  H01M4/587 ,  H01M10/0585 ,  H01M2004/025 ,  H01M2010/4292 ,  H01M2220/30

Abstract: To provide a lithium-ion secondary battery including a first electrode including a first electrode active substance and a second electrode including a second electrode active substance and a third electrode active substance. The second electrode active substance has higher charge and discharge efficiency than the first electrode active substance. The third electrode active substance has lower charge and discharge efficiency than the second electrode active substance. The product of the capacity of the second electrode active substance and the difference between the charge and discharge efficiency of the second electrode active substance and charge and discharge efficiency of the first electrode active substance is greater than the product of the capacity of the third electrode active substance and the difference between the charge and discharge efficiency of the first electrode active substance and the charge and discharge efficiency of the third electrode active substance. The compounding proportion of the second electrode active substance in the total of the second electrode active substance and the third electrode active substance is less than the compounding proportion of the third electrode active substance in the total of the second electrode active substance and the third electrode active substance.

Abstract translation: 提供一种锂离子二次电池，其包括第一电极和第二电极，所述第一电极包括第一电极活性物质和包括第二电极活性物质和第三电极活性物质的第二电极。 第二电极活性物质的充放电效率高于第一电极活性物质。 第三电极活性物质的充放电效率比第二电极活性物质低。 第二电极活性物质的容量与第二电极活性物质的充放电效率的差异与第一电极活性物质的充放电效率的差大于第三电极活性物质的容量乘积 物质和第一电极活性物质的充放电效率与第三电极活性物质的充放电效率之间的差异。 第二电极活性物质与第二电极活性物质和第三电极活性物质的合计比例小于第二电极活性物质和第三电极活性物质的总量中第三电极活性物质的配合比例 物质。

公开(公告)号：US20150155556A1

公开(公告)日：2015-06-04

申请号：US14553674

申请日：2014-11-25

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

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

IPC: H01M4/505 ,  H01M4/525

CPC classification number: H01M4/505 ,  C01G45/1228 ,  C01G53/50 ,  C01P2002/80 ,  C01P2002/85 ,  C01P2002/89 ,  C01P2004/04 ,  H01M4/366 ,  H01M4/525 ,  H01M4/5825

Abstract: To increase the amount of lithium ions that can be received in and released from a positive electrode active material to achieve high capacity and high energy density of a secondary battery. A lithium manganese oxide particle includes a first region and a second region. The valence number of manganese in the first region is lower than the valence number of manganese in the second region. The lithium manganese oxide has high structural stability and high capacity characteristics.

Abstract translation: 为了增加可以从正极活性物质接收和释放的锂离子的量，以实现二次电池的高容量和高能量密度。 锂锰氧化物颗粒包括第一区域和第二区域。 第一区域中的锰的价数低于第二区域中的锰的价数。 锂锰氧化物具有高结构稳定性和高容量特性。

公开(公告)号：US20250105277A1

公开(公告)日：2025-03-27

申请号：US18970314

申请日：2024-12-05

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

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

IPC: H01M4/525 ,  B60L58/12 ,  H01M4/38 ,  H01M4/58 ,  H01M10/0525 ,  H01M10/42 ,  H05K5/00

Abstract: A positive electrode active material for a lithium ion secondary battery which has a large capacity and a good charge-and-discharge cycle performance is provided. The positive electrode active material includes lithium, cobalt, oxygen, and magnesium, and has a compound represented by a layered rock-salt crystal structure. A space group of the compound is represented by R-3m. The compound is a composite oxide in which magnesium is substituted for a lithium position and a cobalt position. The compound is a particle. The magnesium substituted for a lithium position and a cobalt position exists more in the region from the surface to 5 nm than in the region deeper than 10 nm from the surface. More magnesium is substituted for a lithium position than for a cobalt position.

公开(公告)号：US20240405308A1

公开(公告)日：2024-12-05

申请号：US18695496

申请日：2022-09-20

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Yohei MOMMA ,  Tetsuya KAKEHATA ,  Tetsuji ISHITANI ,  Yuji IWAKI ,  Ryota TAJIMA ,  Shuhei YOSHITOMI

IPC: H01M10/615 ,  B60L58/27 ,  H01M10/44 ,  H01M10/48 ,  H01M10/625 ,  H01M10/63 ,  H01M10/653 ,  H01M50/136 ,  H01M50/213

Abstract: A power storage device that is less likely to be influenced by an ambient temperature is provided. The power storage device capable of being charged and discharged even in a low-temperature environment is provided. A first secondary battery capable of being charged and discharged even at low temperatures and a general second secondary battery are adjacent to each other in the power storage device. The power storage device having such a structure can use, as an internal heat source in a low-temperature environment, heat generated by charge and discharge of the secondary battery capable of being charged and discharged even at low temperatures. Specifically, the power storage device includes the first secondary battery and the second secondary battery adjacent to each other, the first secondary battery has flexibility, and a value of discharge capacity in discharge at −40° C. is higher than or equal to 50% of a value of discharge capacity in discharge at 25° C.

公开(公告)号：US20240170667A1

公开(公告)日：2024-05-23

申请号：US18550769

申请日：2022-03-14

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Shunpei YAMAZAKI ,  Tetsuya KAKEHATA ,  Yohei MOMMA ,  Yumiko YONEDA ,  Kazutaka KURIKI ,  Tatsuyoshi TAKAHASHI ,  Kunihiro FUKUSHIMA

IPC: H01M4/525 ,  B60L50/64 ,  H01M4/02 ,  H01M4/131 ,  H01M50/109

CPC classification number: H01M4/525 ,  H01M4/131 ,  H01M50/109 ,  B60L50/64 ,  H01M2004/028 ,  H01M2220/20

Abstract: A battery in which a decrease in discharge capacity retention rate in charge and discharge cycle tests is inhibited is provided. The battery includes a positive electrode and a negative electrode. The positive electrode is used as a positive electrode of a test battery in which a negative electrode includes a lithium metal. When a test of 50 repetitions of a cycle of charge and discharge in which, after constant current charge is performed at a charge rate of 1 C (1 C=200 mA/g) until a voltage of 4.6 V is reached, constant voltage charge is performed at a voltage of 4.6 V until the charge rate reaches 0.1 C, and constant current discharge is then performed at a discharge rate of 1 C until a voltage of 2.5 V is reached is performed in a 25° C. environment or a 45° C. environment and discharge capacity is measured in each cycle, a discharge capacity value measured in a 50th cycle accounts for higher than or equal to 90% and lower than 100% of a maximum discharge capacity value in all 50 cycles.

公开(公告)号：US20240047691A1

公开(公告)日：2024-02-08

申请号：US18360024

申请日：2023-07-27

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Jo SAITO ,  Yohei MOMMA ,  Kunihiro FUKUSHIMA ,  Teppei OGUNI

IPC: H01M4/62 ,  H01M4/525 ,  H01M4/1315 ,  H01M4/134

CPC classification number: H01M4/628 ,  H01M4/525 ,  H01M4/1315 ,  H01M4/134 ,  H01M2004/028

Abstract: A secondary battery with little deterioration is provided. A highly reliable secondary battery is provided. A positive electrode active material included in the secondary battery includes a crystal of lithium cobalt oxide. The positive electrode active material includes a first region including a surface parallel to the (00l) plane of the crystal and a second region including a surface parallel to a plane intersecting with the (00l) plane. The positive electrode active material contains magnesium. The first region includes a portion with a magnesium concentration that is higher than or equal to 0.5 atomic % and lower than or equal to 10 atomic %. The second region includes a portion with a magnesium concentration that is higher than the magnesium concentration in the first region and is higher than or equal to 4 atomic % and lower than or equal to 30 atomic %. Furthermore, the second region includes a portion with a fluorine concentration that is higher than a fluorine concentration in the first region and is higher than or equal to 0.5 atomic % and lower than or equal to 10 atomic %.