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公开(公告)号：US20220263066A1
公开(公告)日：2022-08-18
申请号：US17630656
申请日：2020-07-21
Inventor： Taisuke Asano , Yohei Uchiyama , Yosuke Sato
Abstract: A negative electrode material for a non-aqueous electrolyte secondary battery, including a silicate phase, silicon particles dispersed in the silicate phase, and a crystal phase dispersed in the silicate phase. The silicate phase contains at least one element E1 selected from the group consisting of alkali metal elements and Group 2 elements. The crystal phase contains a rare earth element, silicon, and oxygen.
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Patent Agency Ranking
公开(公告)号：US20220190314A1
公开(公告)日：2022-06-16
申请号：US17439944
申请日：2020-03-11
Inventor： Yohei Uchiyama , Taisuke Asano , Yosuke Sato , Masahiro Soga
IPC: H01M4/134 , H01M10/0567 , H01M10/0525 , H01M4/36
Abstract: A negative electrode for a non-aqueous electrolyte secondary battery includes a negative electrode mixture comprising a negative electrode active material capable of electrochemically absorbing and releasing lithium ions, a negative electrode additive, and an acrylic resin. The negative electrode active material includes a silicon containing material. The Negative electrode additive includes at least silicon dioxide and a group 2 element oxide, and the group 2 element oxide includes at least one selected from the group consisting of BeO, MgO, CaO, SrO, BaO and RaO. The acrylic resin includes at least a (meth)acrylic acid salt unit. The content of the group 2 element oxide in the negative electrode additive is less than 20 mass % relative to a total amount of the negative electrode additive.
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公开(公告)号：US20250096264A1
公开(公告)日：2025-03-20
申请号：US18580814
申请日：2022-07-12
Inventor： Yuta Kuroda , Yosuke Sato , Keiko Kato
Abstract: A negative electrode for a secondary battery includes a negative electrode current collector and a negative electrode mixture layer including a negative electrode active material, wherein the negative electrode active material includes carbon particles and Si-containing particles, and in a distribution in a plane direction of the negative electrode mixture layer of a presence probability of Si element in a thickness direction of the negative electrode mixture layer, a difference of an upper limit value Rmax and a lower limit value Rmin in a 1σ region: Rmax−Rmin is 20% or less.
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公开(公告)号：US20230207806A1
公开(公告)日：2023-06-29
申请号：US17927292
申请日：2021-05-20
Inventor： Yohei Uchiyama , Yosuke Sato
IPC: H01M4/58 , H01M4/38 , H01M4/36 , H01M10/052
CPC classification number: H01M4/5825 , H01M4/386 , H01M4/364 , H01M10/052 , H01M2004/027
Abstract: A negative electrode active material for a secondary battery includes a lithium silicate phase, and a silicon phase dispersed in the lithium silicate phase. An electron diffraction image of the negative electrode active material obtained using a transmission electron microscope has a spot image, and an average particle diameter of the negative electrode active material is 8 μm or less.
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公开(公告)号：US20230078415A1
公开(公告)日：2023-03-16
申请号：US17795809
申请日：2020-12-17
Inventor： Yusuke Saito , Toshiki Kamidaira , Naoki Seki , Yosuke Sato
Abstract: A negative electrode active material for a secondary battery includes silicate composite particles including silicon particles and a silicate phase. The silicon particles are dispersed in the silicate phase, and the silicon particles contain a first element of at least one selected from the group consisting of germanium and aluminum.
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公开(公告)号：US20210320299A1
公开(公告)日：2021-10-14
申请号：US17270519
申请日：2019-08-23
Inventor： Yohei Uchiyama , Taisuke Asano , Yosuke Sato
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, and the alkali metals include at least Na and K.
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