公开(公告)号：US20150270550A1

公开(公告)日：2015-09-24

申请号：US14667647

申请日：2015-03-24

Applicant: Nichia Corporation

Inventor： Tomooki KAWASAKI ,  Kenichi KOBAYASHI

IPC: H01M4/58

CPC classification number: H01M4/5825 ,  C01G45/1242 ,  C01G51/54

Abstract: The present invention provides a positive electrode active material for nonaqueous electrolyte secondary battery including a lithium transition metal composite oxide represented by the following formula: LiaNixMn2-xFeyBzO4 wherein 1.00≦a≦1.30, 0.30≦x≦0.60, 0.003≦y≦0.200, and 0.003≦z≦0.200.

Abstract translation: 本发明提供一种非水电解质二次电池用正极活性物质，其包含由下式表示的锂过渡金属复合氧化物：LiaNixMn2-xFeyBzO4，其中1.00＆nlE; a＆nlE; 1.30,0.30＆lt; NlE; x＆lt; lE; 0.60,0.003＆ 0.200和0.003＆nlE; z＆nlE; 0.200。

公开(公告)号：US20190097226A1

公开(公告)日：2019-03-28

申请号：US16142784

申请日：2018-09-26

Applicant: NICHIA CORPORATION

Inventor： Tomooki KAWASAKI ,  Kenichi KOBAYASHI ,  Sachiko MASUDA

IPC: H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  C01G53/00

Abstract: A positive-electrode active material for a non-aqueous electrolyte secondary battery is provided. The positive-electrode active material contains a lithium transition metal composite oxide having a spinel structure and containing nickel and manganese. The lithium transition metal composite oxide has a surface region containing niobium as a solid solution. A mole ratio of an amount of niobium to a total amount of nickel and manganese in the surface region decreases according to a distance from a surface in a depth direction in a region from the surface to a distance of 0.3 nm in the depth direction.

公开(公告)号：US20160285092A1

公开(公告)日：2016-09-29

申请号：US15075937

申请日：2016-03-21

Applicant: NICHIA CORPORATION

Inventor： Tomooki KAWASAKI ,  Kenichi KOBAYASHI

IPC: H01M4/505 ,  H01M4/525 ,  H01M10/052

CPC classification number: H01M4/505 ,  C01G53/54 ,  C01P2002/52 ,  C01P2006/40 ,  H01B1/08 ,  H01M4/525 ,  H01M10/052

Abstract: The present disclosure provides a positive electrode active material for nonaqueous electrolyte secondary batteries including: a lithium transition metal composite oxide represented by general formula: Lia(Ni1-xCrx)a(Mn1-yTiy)2-α-β-γ-δMgβAlγMδO4 in which 1.00≦a≦1.30, 0.020≦x≦0.200, 0.006≦y≦0.070, 0.450≦α≦0.550, 0≦β≦0.015, 0≦γ≦0.035, and 0≦δ≦0.010, and M represents at least one element selected from the group consisting of Na, K, Ca, Sr, Ba, Ga, Co, Zn, Si, Ge, Zr, Hf, Sn, Ta, Nb, P, Bi, Mo, and W.

Abstract translation: 本发明提供一种非水电解质二次电池用正极活性物质，其特征在于，具有以下通式：LiI（Ni1-xCrx）a（Mn1-yTiy）2-α-β-γ-δMgβAlγMδO4表示的锂过渡金属复合氧化物，其中 1.00≤a≤1.30,0.020≤x≤0.200,0.006≤y≤0.070,0.450≤α≤0.550,0≤β≤0.015,0≤γ≤0.035,0≤δ≤0.010，M表示至少一种元素 选自Na，K，Ca，Sr，Ba，Ga，Co，Zn，Si，Ge，Zr，Hf，Sn，Ta，Nb，P，Bi，Mo和W.

公开(公告)号：US20220181621A1

公开(公告)日：2022-06-09

申请号：US17652277

申请日：2022-02-23

Applicant: NICHIA CORPORATION

Inventor： Tomooki KAWASAKI ,  Kenichi KOBAYASHI ,  Takahiro KITAGAWA

IPC: H01M4/525 ,  C01G53/00 ,  H01M4/505

Abstract: A method of producing a positive-electrode active material for a non-aqueous electrolyte secondary battery is provided. The method includes obtaining a precipitate containing nickel and manganese from a solution containing nickel and manganese, heat-treating the resulting precipitate at a temperature of from 850° C. to less than 1100° C. to obtain a first heat-treated product, mixing the first heat-treated product and a lithium compound, and heat-treating the resulting lithium-containing mixture at a temperature of from 550° C. to 1000° C. to obtain a second heat-treated product. The second heat-treated product contains a group of lithium transition metal composite oxide particles having an average particle diameter DSEM of from 0.5 μm to less than 3 μm and D50/DSEM of 1 to 2.5. The lithium transition metal composite oxide particles have a spinel structure based on nickel and manganese.

公开(公告)号：US20180351175A1

公开(公告)日：2018-12-06

申请号：US15993724

申请日：2018-05-31

Applicant: NICHIA CORPORATION

Inventor： Tomooki KAWASAKI ,  Kenichi KOBAYASHI ,  Takahiro KITAGAWA

IPC: H01M4/525 ,  C01G53/00 ,  H01M4/505

Abstract: A method of producing a positive-electrode active material for a non-aqueous electrolyte secondary battery is provided. The method includes obtaining a precipitate containing nickel and manganese from a solution containing nickel and manganese, heat-treating the resulting precipitate at a temperature of from 850° C. to less than 1100° C. to obtain a first heat-treated product, mixing the first heat-treated product and a lithium compound, and heat-treating the resulting lithium-containing mixture at a temperature of from 550° C. to 1000° C. to obtain a second heat-treated product. The second heat-treated product contains a group of lithium transition metal composite oxide particles having an average particle diameter DSEM of from 0.5 μm to less than 3 μm and D50/DSEM of 1 to 2.5. The lithium transition metal composite oxide particles have a spinel structure based on nickel and manganese.