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.

公开(公告)号：US10516159B2

公开(公告)日：2019-12-24

申请号：US14723306

申请日：2015-05-27

Applicant: Nichia Corporation

Inventor： Tatsuya Yokoyama

IPC: H01M4/36 ,  H01M4/131 ,  H01M4/525 ,  H01M4/505 ,  H01M4/485 ,  H01M4/02

Abstract: The present invention provides a positive electrode active material for a non-aqueous secondary battery including: core particles including, as a main component, a lithium metal composite oxide represented by the following formula: LixNiyM11-y-zM2zO2 in which 0.90≤x≤1.50, 0.6≤y≤1.0, 0≤z≤0.02, M1 represents at least one element selected from Co, Mn and Al, and M2 represents at least one element selected from the group consisting of Zr, Ti, Mg, B and W, and containing a water-soluble lithium compound in a content of 1.0% or less in terms of a mass ratio; and a surface-treated portion obtained by treating the core particles with a coupling agent.

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：US12266794B2

公开(公告)日：2025-04-01

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 ,  C01G53/40 ,  C01G53/42 ,  H01M4/02 ,  H01M4/131 ,  H01M4/1391

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.