公开(公告)号：US11942631B2

公开(公告)日：2024-03-26

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 ,  C01G53/00 ,  H01M4/02 ,  H01M4/131 ,  H01M4/1391

CPC classification number: H01M4/485 ,  C01G53/40 ,  C01G53/42 ,  H01M4/131 ,  H01M4/1391 ,  C01P2002/52 ,  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：US11621415B2

公开(公告)日：2023-04-04

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 ,  C01G53/00 ,  H01M4/02

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.