公开(公告)号：US20200266441A1

公开(公告)日：2020-08-20

申请号：US16795539

申请日：2020-02-19

Applicant: NICHIA CORPORATION

Inventor： Kumi YOSHIHARA ,  Kosuke SHIMOKITA ,  Kiyoto IKEBATA ,  Takashi SUGIMOTO

IPC: H01M4/525 ,  H01M4/36 ,  H01M10/0525 ,  H01M4/505

Abstract: Provided is a positive-electrode active material for a nonaqueous electrolyte secondary battery, including a lithium transition metal composite oxide particle having a layered structure and containing nickel, and an oxide containing lithium and aluminum and an oxide containing lithium and boron adhering to a surface of the lithium transition metal composite oxide particle. The lithium transition metal composite oxide particle includes a secondary particle formed by aggregation of primary particles containing a solid solution of aluminum in a surface layer. The lithium transition metal composite oxide particles have a composition with a difference of more than 0.22 mol % and less than 0.6 mol % between a ratio of the number of moles of aluminum in the solid solution in the surface layer of the primary particles relative to a total number of moles of metal other than lithium and a ratio of the number of moles of aluminum present in a region other than the surface layer of the primary particles relative to the total number of moles of metal other than lithium.

公开(公告)号：US20230197943A1

公开(公告)日：2023-06-22

申请号：US18170373

申请日：2023-02-16

Applicant: NICHIA CORPORATION

Inventor： Ryuhei HATTORI ,  Yoshitomo MIYASHITA ,  Tatsuya YOKOYAMA ,  Chika NISHIO ,  Takashi SUGIMOTO

IPC: H01M4/485 ,  H01M4/131 ,  H01M4/1391 ,  C01G53/00

CPC classification number: H01M4/485 ,  H01M4/131 ,  H01M4/1391 ,  C01G53/40 ,  C01G53/42 ,  H01M2004/028

Abstract: A method of producing a positive electrode active material, the method includes: contacting first particles that contain a lithium transition metal composite oxide with a solution containing sodium ions to obtain second particles containing the lithium transition metal composite oxide and sodium element, wherein the lithium transition metal composite oxide has a layered structure and a composition ratio of a number of moles of nickel to a total number of moles of metals other than lithium in a range of from 0.7 to less than 1; mixing the second particles and a boron compound to obtain a mixture; and heat-treating the mixture at a temperature in a range of from 100° C. to 450° C.

公开(公告)号：US20240304788A1

公开(公告)日：2024-09-12

申请号：US18547869

申请日：2022-02-17

Applicant: NICHIA CORPORATION

Inventor： Takashi SUGIMOTO ,  Hideki YOSHIDA

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/583 ,  H01M4/62

CPC classification number: H01M4/364 ,  H01M4/583 ,  H01M2004/021 ,  H01M2004/028 ,  H01M4/623 ,  H01M4/625

Abstract: Provided is a carbon material having a large specific surface area and good filling properties. The carbon material has a circularity of more than 0.83 and a specific surface area of not less than 400 m2/g. The carbon material is produced by a production method includes: providing a suspension containing first carbon particles having a specific surface area of not less than 50 m2/g, a water-soluble binder, and water; obtaining granular bodies from the suspension; and subjecting the granular bodies to heat treatment to obtain second carbon particles.

公开(公告)号：US20240072253A1

公开(公告)日：2024-02-29

申请号：US18495121

申请日：2023-10-26

Applicant: NICHIA CORPORATION

Inventor： Kumi YOSHIHARA ,  Kosuke SHIMOKITA ,  Kiyoto IKEBATA ,  Takashi SUGIMOTO

IPC: H01M4/525 ,  C01G53/00 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/36 ,  H01M4/505 ,  H01M10/0525

CPC classification number: H01M4/525 ,  C01G53/50 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/366 ,  H01M4/505 ,  H01M10/0525 ,  H01M2004/028

Abstract: Provided is a positive-electrode active material for a nonaqueous electrolyte secondary battery, including a lithium transition metal composite oxide particle having a layered structure and containing nickel, and an oxide containing lithium and aluminum and an oxide containing lithium and boron adhering to a surface of the lithium transition metal composite oxide particle. The lithium transition metal composite oxide particle includes a secondary particle formed by aggregation of primary particles containing a solid solution of aluminum in a surface layer. The lithium transition metal composite oxide particles have a composition with a difference of more than 0.22 mol % and less than 0.6 mol % between a ratio of the number of moles of aluminum in the solid solution in the surface layer of the primary particles relative to a total number of moles of metal other than lithium and a ratio of the number of moles of aluminum present in a region other than the surface layer of the primary particles relative to the total number of moles of metal other than lithium.

公开(公告)号：US20210013503A1

公开(公告)日：2021-01-14

申请号：US16926613

申请日：2020-07-10

Applicant: NICHIA CORPORATION

Inventor： Ryuhei HATTORI ,  Yoshitomo MIYASHITA ,  Tatsuya YOKOYAMA ,  Chika NISHIO ,  Takashi SUGIMOTO

IPC: H01M4/485 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/04

Abstract: A method of producing a positive electrode active material, the method includes: contacting first particles that contain a lithium transition metal composite oxide with a solution containing sodium ions to obtain second particles containing the lithium transition metal composite oxide and sodium element, wherein the lithium transition metal composite oxide has a layered structure and a composition ratio of a number of moles of nickel to a total number of moles of metals other than lithium in a range of from 0.7 to less than 1; mixing the second particles and a boron compound to obtain a mixture; and heat-treating the mixture at a temperature in a range of from 100° C. to 450° C.

公开(公告)号：US20240154107A1

公开(公告)日：2024-05-09

申请号：US18417513

申请日：2024-01-19

Applicant: NICHIA CORPORATION

Inventor： Ryuhei HATTORI ,  Yoshitomo MIYASHITA ,  Tatsuya YOKOYAMA ,  Chika NISHIO ,  Takashi SUGIMOTO

IPC: H01M4/485 ,  C01G53/00 ,  H01M4/131 ,  H01M4/1391

CPC classification number: H01M4/485 ,  C01G53/40 ,  C01G53/42 ,  H01M4/131 ,  H01M4/1391 ,  H01M2004/028

Abstract: A method of producing a positive electrode active material, the method includes: contacting first particles that contain a lithium transition metal composite oxide with a solution containing sodium ions to obtain second particles containing the lithium transition metal composite oxide and sodium element, wherein the lithium transition metal composite oxide has a layered structure and a composition ratio of a number of moles of nickel to a total number of moles of metals other than lithium in a range of from 0.7 to less than 1; mixing the second particles and a boron compound to obtain a mixture; and heat-treating the mixture at a temperature in a range of from 100° C. to 450° C.

公开(公告)号：US20230187609A1

公开(公告)日：2023-06-15

申请号：US17995303

申请日：2021-03-31

Applicant: NICHIA CORPORATION

Inventor： Takashi SUGIMOTO ,  Hideki YOSHIDA ,  Toru KOIZUKA ,  Shoma HATA

IPC: H01M4/36 ,  H01M10/052 ,  H01M4/485 ,  H01M4/525 ,  H01M4/587 ,  H01M4/62 ,  H01M4/04

CPC classification number: H01M4/364 ,  H01M10/052 ,  H01M4/485 ,  H01M4/525 ,  H01M4/587 ,  H01M4/624 ,  H01M4/0404 ,  H01M2004/028

Abstract: Provided is a positive electrode composition with which a lithium sulfur battery may achieve a high cycle capacity retention. The positive electrode composition for lithium sulfur batteries includes a sulfur-carbon composite including a carbon material having void spaces and an elemental sulfur containing material disposed in the void spaces of the carbon material, and a lithium transition metal composite oxide.