-
公开(公告)号：US20200350563A1
公开(公告)日：2020-11-05
申请号：US16957156
申请日：2018-10-29
Inventor： Yohei Uchiyama , Norihisa Yamamoto , Tatsuya Akira
IPC: H01M4/36 , H01M4/58 , H01M10/0525 , H01M4/38
Abstract: A negative electrode active material for non-aqueous electrolyte secondary batteries, including: lithium silicate composite particles including a lithium silicate phase and silicon particles dispersed in the lithium silicate phase, the lithium silicate phase being an oxide phase including Li, Si, O, and M, where M is an element other than the following elements: Group 1 elements of alkali metals, Group 16 elements of oxygen group, Group 18 elements of rare gas, and Si. An amount of each element relative to a total amount of Li, Si and M in the lithium silicate phase is 3 to 55 mol % for Li, 25 mol % or more for Si, and 3 to 50 mol % for M. A carbon material is present inside the lithium silicate composite particles; and an area ratio of the carbon material occupying a cross section of the composite particles is 0.008 to 6%.
-
公开(公告)号：US11990606B2
公开(公告)日：2024-05-21
申请号：US16957156
申请日：2018-10-29
Inventor： Yohei Uchiyama , Norihisa Yamamoto , Tatsuya Akira
IPC: H01M4/36 , H01M4/02 , H01M4/38 , H01M4/58 , H01M10/0525
CPC classification number: H01M4/362 , H01M4/38 , H01M4/5825 , H01M10/0525 , H01M2004/027
Abstract: A negative electrode active material for non-aqueous electrolyte secondary batteries, including: lithium silicate composite particles including a lithium silicate phase and silicon particles dispersed in the lithium silicate phase, the lithium silicate phase being an oxide phase including Li, Si, O, and M, where M is an element other than the following elements: Group 1 elements of alkali metals, Group 16 elements of oxygen group, Group 18 elements of rare gas, and Si. An amount of each element relative to a total amount of Li, Si and M in the lithium silicate phase is 3 to 55 mol % for Li, 25 mol % or more for Si, and 3 to 50 mol % for M. A carbon material is present inside the lithium silicate composite particles; and an area ratio of the carbon material occupying a cross section of the composite particles is 0.008 to 6%.
-
公开(公告)号：US11715822B2
公开(公告)日：2023-08-01
申请号：US16650236
申请日：2018-09-26
Inventor： Norihisa Yamamoto , Yohei Uchiyama , Tatsuya Akira , Kazuro Hayashida
CPC classification number: H01M4/364 , H01M4/134 , H01M4/136 , H01M4/366 , H01M4/386 , H01M4/5825 , H01M4/625 , H01M10/0525 , H01M2004/027
Abstract: Negative electrode active material particles comprise base particles having: a silicate phase containing Li2O, SiO2, at least one oxide selected from M12O3, M2O2, M32O5, and M4O3 (where M1, M2, M3, and M4 are elements other than alkali metals, alkali earth metals, and Si), and a discretionary component MO (where M is an alkali earth metal); and silicon particles dispersed in the silicate phase. The element contents for the elements contained in the silicate phase are: 3-33 mol % of Li; 40-78 mol % of S; and 1-40 mol % of M1, M2, M3, and M4. If MO is contained, the M content in the silicate phase is 1-10 mol %.
-
公开(公告)号：US20230086333A1
公开(公告)日：2023-03-23
申请号：US17802816
申请日：2021-02-09
Inventor： Masahiro Soga , Norihisa Yamamoto
Abstract: A negative electrode for a nonaqueous electrolyte secondary battery includes a negative electrode mixture including a negative electrode active material capable of electrochemically storing and releasing lithium ions, a carbon nanotube, and an acrylic resin, wherein the negative electrode active material includes a silicon-containing material, and the carbon nanotube has an average diameter of 5 nm or less.
-
Patent Agency Ranking
公开(公告)号：US11271197B2
公开(公告)日：2022-03-08
申请号：US16497609
申请日：2018-02-16
Inventor： Taisuke Asano , Yohei Uchiyama , Taisuke Yamamoto , Tatsuya Akira , Norihisa Yamamoto , Hiroshi Minami
Abstract: Disclosed is a negative electrode material for a non-aqueous electrolyte secondary battery, including: a lithium silicate phase; silicon particles dispersed in the lithium silicate phase; and at least one element Me dispersed in the lithium silicate phase, and selected from the group consisting of a rare-earth element and an alkaline-earth metal. The composition of the lithium silicate phase is represented, for example, by the formula: Li2zSiO2+z, and satisfies 0
-
公开(公告)号：US20210384496A1
公开(公告)日：2021-12-09
申请号：US17283066
申请日：2019-10-17
Inventor： Keita Okazaki , Norihisa Yamamoto
Abstract: In the present invention, negative electrode active material particles for a nonaqueous electrolyte secondary battery which can suppress decrease of charging and discharging cycle characteristics, are each provided with: a composite particle that includes a silicate phase and silicon particles dispersed in the silicate phase; and a surface layer that covers the composite particle, wherein the surface layer includes a fluorine resin.
-
公开(公告)号：US20210202930A1
公开(公告)日：2021-07-01
申请号：US16650236
申请日：2018-09-26
Inventor： Norihisa Yamamoto , Yohei Uchiyama , Tatsuya Akira , Kazuro Hayashida
Abstract: Negative electrode active material particles comprise base particles having: a silicate phase containing Li2O, SiO2, at least one oxide selected from M12O3, M2O2, M32O5, and M4O3 (where M1, M2, M3, and M4 are elements other than alkali metals, alkali earth metals, and Si), and a discretionary component MO (where M is an alkali earth metal); and silicon particles dispersed in the silicate phase. The element contents for the elements contained in the silicate phase are: 3-33 mol % of Li; 40-78 mol % of S; and 1-40 mol % of M1, M2, M3, and M4. If MO is contained, the M content in the silicate phase is 1-10 mol %.
-
公开(公告)号：US20210167367A1
公开(公告)日：2021-06-03
申请号：US17267231
申请日：2019-08-23
Inventor： Yohei Uchiyama , Norihisa Yamamoto , Keita Okazaki
Abstract: A negative electrode active material for a secondary battery includes silicate composite particles each of which contain a silicate phase and silicon particles dispersed in the silicate phase, the silicate phase is an oxide phase containing Si, O, and alkali metals, the alkali metals include at least Na and Li, and an atomic ratio: Na/Li of Na to Li is 0.1 to 7.1.
-
公开(公告)号：US20190319261A1
公开(公告)日：2019-10-17
申请号：US16464817
申请日：2017-11-17
Inventor： Yohei Uchiyama , Taisuke Yamamoto , Tatsuya Akira , Norihisa Yamamoto , Hiroshi Minami
Abstract: Disclosed is a negative electrode material including: a lithium silicate phase that contains a lithium silicate; and silicon particles that are dispersed in the lithium silicate phase, wherein the silicon particles have a crystallite size of 10 nm or more, and the lithium silicate has a composition represented by the following formula: Li2Si2O5.(x−2)SiO2, where 2
-
-
-
-
-
-
-
-
Search Results
29
records
(took 0.023 seconds)
