-
公开(公告)号：US20230197948A1
公开(公告)日：2023-06-22
申请号：US17926419
申请日：2021-04-08
IPC分类号： H01M4/525 , H01M4/485 , H01M4/505 , H01M10/052
CPC分类号： H01M4/525 , H01M4/485 , H01M4/505 , H01M10/052 , H01M2004/028
摘要： A positive electrode active material contains a lithium transition metal composite oxide that contains 85% by mole or more of Ni relative to the total number of moles of metal elements excluding Li and at least one metal element M1 that is selected from among Mg, Ti, Nb, Zr and V in an amount of 3% by mole or less relative to the total number of moles of metal elements excluding Li. The ratio of the concentration of metal element M1 contained in the shell of each primary particle of the composite oxide to the concentration of metal element M1 contained in the core is from 1.01 to 20; and at least one metal element M2 of Ca and Sr is on the surface of each primary particle in an amount of 1% by mole or less relative to the total number of moles of metal elements excluding Li.
-
公开(公告)号：US11121363B2
公开(公告)日：2021-09-14
申请号：US16326560
申请日：2017-08-22
IPC分类号： H01M4/36 , H01M4/525 , H01M4/58 , H01M10/0525 , H01M4/02
摘要： The present invention is directed to a positive electrode active material for non-aqueous electrolyte secondary batteries that can reduce direct-current resistance while it contains a nickel-containing lithium transition metal oxide with a high Ni content. The positive electrode active material contains lithium borate and a nickel-containing lithium transition metal oxide (Ni≥80 mol %) having a layered structure. The nickel-containing lithium transition metal oxide is composed of secondary particles formed by aggregation of primary particles. Lithium borate is attached to the surfaces of the primary particles. The proportion b of lithium borate with respect to the total molar amount of metal elements other than lithium in the nickel-containing lithium transition metal oxide is in the range of 0 mol %
-
公开(公告)号：US11831013B2
公开(公告)日：2023-11-28
申请号：US16957143
申请日：2018-12-17
发明人： Yoshinori Aoki , Takeshi Ogasawara
CPC分类号： H01M4/525 , H01M2004/027
摘要： The positive electrode active material for a non-aqueous electrolyte secondary cell according to an embodiment of the present disclosure is characterized in having a Ni-containing lithium transition metal oxide having a layered structure; the proportion of Ni in the lithium transition metal oxide being 91 to 96 mol % relative to the total number of moles of metal elements excluding Li; a transition metal being present in the Li layer of the layered structure at an amount of 1 to 2.5 mol % relative to the total number of moles of transition metals in the Ni-containing lithium transition metal oxide; and the Ni-containing lithium transition metal oxide being such that the half width n of the diffraction peak for the (208) plane in an X-ray diffraction pattern obtained by X-ray diffraction is 0.30°≤0≤0.50°.
-
公开(公告)号：US20230207794A1
公开(公告)日：2023-06-29
申请号：US17926753
申请日：2021-04-20
发明人： Katsuya Inoue , Takeshi Ogasawara , Yoshinori Aoki
IPC分类号： H01M4/485 , H01M10/052
CPC分类号： H01M4/485 , H01M10/052 , H01M2004/028
摘要： A positive electrode active material for nonaqueous electrolyte secondary batteries comprises a lithium transition metal composite oxide that has secondary particles each formed from aggregated primary particles and a surface modification layer that is formed on the surface of each of the primary particles of the lithium transition metal composite oxide, in which the lithium transition metal composite oxide contains at least Al and Ni in an amount of 80 mol % or more relative to the total number of moles of metal elements excluding Li, the surface modification layer contains W and at least one of Sr and Ca, and the content of W in the surface modification layer is 0.075 mol % or less relative to the total number of moles of the metal elements excluding Li in the lithium transition metal composite oxide.
-
公开(公告)号：US20230032577A1
公开(公告)日：2023-02-02
申请号：US17779733
申请日：2020-09-17
发明人： Yoshinori Aoki , Masakazu Togo , Takeshi Ogasawara
摘要： A positive-electrode active material for nonaqueous-electrolyte secondary batteries which comprises a given lithium-transition metal composite oxide haying a lamellar structure and a compound A containing Ca and/or Sr, the compound A being present on the surface of or at the boundaries of primary particles of the lithium-transition metal composite oxide. The lamellar structure includes an Li layer where Li reversibly goes in and out, and the proportion of non-lithium metallic element(s) present in the Li layer is 0.7-3.0 mol % with respect to the total amount of the non-lithium metallic elements contained in the lithium-transition metal composite oxide. In analysis by X-ray diffraction, the positive-electrode active material gives an X-ray diffraction pattern in which the ratio of the half-band width in of a diffraction peak for the (003) plane to the half-band width n of a diffraction peak for the (104) plane, m/n, is 0.7.5≤m/n≤1.0.
-
公开(公告)号：US20210408538A1
公开(公告)日：2021-12-30
申请号：US17295213
申请日：2019-10-31
发明人： Yoshinori Aoki , Takeshi Ogasawara , Takaya Tochio
摘要： A positive electrode active material for batteries wherein the ratio of Ni, the ratio of Nb and the ratio of Co relative to the total amount of metal elements excluding Li in a lithium transition metal oxide are respectively within the range of 90 mol %≤Ni
-
7.发明申请公开(公告)号：US20190103605A1
公开(公告)日：2019-04-04
申请号：US16086745
申请日：2017-02-13
摘要： A positive electrode active material for a nonaqueous electrolyte secondary battery contains silicon and lithium nickel complex oxide having a layered rock-salt structure and is composed of secondary particles formed of aggregated primary particles. Lithium nickel complex oxide contains 80 mol % or more of nickel, based on the total amount of metal excluding lithium, silicon content is 0.6 mass % or less based on the total amount of the positive electrode active material, and a porosity of the positive electrode active material is 0% or more and 1% or less.
-
公开(公告)号：US20240186503A1
公开(公告)日：2024-06-06
申请号：US18282606
申请日：2022-03-16
CPC分类号： H01M4/525 , H01M4/366 , H01M10/05 , H01M2004/021 , H01M2004/028
摘要： A positive electrode active material for non-aqueous electrolyte secondary batteries according to an example embodiment of the present invention comprises a lithium transition metal composite oxide having a layered structure and containing not less than 75 mol % of Ni with respect to the total molar quantity of elements excluding Li and O. The lithium transition metal composite oxide is of secondary particles obtained by aggregation of primary particles. A compound represented by the general formula AxByOz (where 1≤x≤2, 1≤y≤5, 4≤z≤9, A is at least one element selected from among Ca and Sr, and B is at least one element selected from among W, Mo, Ti, Si, Nb, and Zr) is adhered at at least the interface between primary particles inside the secondary particles.
-
9.发明公开公开(公告)号：US20240058675A1
公开(公告)日：2024-02-22
申请号：US18380679
申请日：2023-10-17
发明人： Yoshinori Aoki , Takeshi Ogasawara
IPC分类号： A63B69/00
CPC分类号： A63B69/0026 , A63B2102/26
摘要： The positive electrode active material for a non-aqueous electrolyte secondary cell according to an embodiment of the present disclosure is characterized in having a Ni-containing lithium transition metal oxide having a layered structure; the proportion of Ni in the lithium transition metal oxide being 91 to 96 mol % relative to the total number of moles of metal elements excluding Li; a transition metal being present in the Li layer of the layered structure at an amount of 1 to 2.5 mol % relative to the total number of moles of transition metals in the Ni-containing lithium transition metal oxide; and the Ni-containing lithium transition metal oxide being such that the half width n of the diffraction peak for the (208) plane in an X-ray diffraction pattern obtained by X-ray diffraction is 0.30°≤n≤0.50°.
-
公开(公告)号：US20240055595A1
公开(公告)日：2024-02-15
申请号：US18267578
申请日：2021-12-06
CPC分类号： H01M4/525 , H01M4/505 , H01M2004/028
摘要： The positive electrode contains a lithium-transition metal composite oxide. With respect to the lithium-transition metal composite oxide, the content of Ni is from 80% by mole to 95% by mole relative to the total number of moles of metal elements excluding Li, and the content of Mo is less than 3% by mole relative to the total number of moles of metal elements excluding Li. The negative electrode comprises a negative electrode mixture layer that contains a negative electrode active material, and a coating film that is formed on the surface of the negative electrode mixture layer, while containing Mo. The content of Mo in the negative electrode is from 0.5 ppm to 120 ppm relative to the total mass of the lithium-transition metal composite oxide in the positive electrode.
-
-
-
-
-
-
-
-
-
搜索结果
28 条记录 (耗时 0.02 秒)
