公开(公告)号：US20200295359A1

公开(公告)日：2020-09-17

申请号：US16753486

申请日：2018-09-18

Applicant: SHOWA DENKO K.K. ,  UMICORE

Inventor： Yasunari OTSUKA ,  Nobuaki ISHII ,  Nicolas MARX ,  Stijn PUT

IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/38 ,  H01M4/62

Abstract: A negative electrode material for lithium ion secondary batteries, including composite material particles containing nanosilicon particles having a 50% particle diameter (Dn50) of 5 to 100 nm in a number-based cumulative particle size distribution of primary particles, graphite particles and an amorphous carbon material; the composite material particles containing the nanosilicon particles at a content of 30 to 60 mass % or less, and the amorphous carbon material at a content of 30 to 60 mass % or less; the composite material particles having a 90% particle diameter (DV90) in the volume-based cumulative particle size distribution of 10.0 to 40.0 μm, a BET specific surface area of 1.0 to 5.0 m2/g, and an exothermic peak temperature in DTA measurement of 830° C. to 950° C. Also disclosed is a paste for negative electrodes, a negative electrode sheet, a lithium ion secondary battery and a method for manufacturing the negative electrode material.

公开(公告)号：US20160111724A1

公开(公告)日：2016-04-21

申请号：US14894201

申请日：2014-05-30

Applicant: SHOWA DENKO K.K.

Inventor： Takeshi NAKAMURA ,  Nobuaki ISHII ,  Yuta HIRANO

IPC: H01M4/587 ,  H01M10/0525

CPC classification number: H01M4/587 ,  H01M4/133 ,  H01M4/134 ,  H01M4/1393 ,  H01M4/1395 ,  H01M4/362 ,  H01M4/38 ,  H01M4/386 ,  H01M4/387 ,  H01M4/463 ,  H01M4/625 ,  H01M10/0525 ,  H01M2004/027

Abstract: A method for producing a negative electrode material for lithium ion secondary battery which includes: pressing a mixed liquid comprising particles (B) containing an element capable of occluding/releasing lithium ions, carbon nanotubes (C) of which not less than 95% by number have a fiber diameter of not less than 5 nm and not more than 40 nm, and water into a pulverizing nozzle of a high-pressure dispersing device to obtain a paste or slurry; drying the paste or slurry into a powder; and mixing the powder and carbon particles (A). A negative electrode material for lithium ion secondary battery including carbon particles (A); and flocculates in which particles (B) containing an element capable of occluding/releasing lithium ions and carbon nanotubes (C) of which not less than 95% by number has a fiber diameter of not less than 5 nm and not more than 40 nm are uniformly composited.

Abstract translation: 一种锂离子二次电池用负极材料的制造方法，其特征在于，包括：包含含有能够吸留或释放锂离子的元素的粒子（B）的混合液，不低于95个数的碳纳米管（C） 纤维直径不小于5nm且不大于40nm，水分入高压分散装置的粉碎喷嘴中以获得糊状物或浆料; 将糊或浆料干燥成粉末; 并混合粉末和碳颗粒（A）。 一种含有碳粒子（A）的锂离子二次电池用负极材料。 并且其中含有能够吸留/释放锂离子的元素的颗粒（B）和其不小于95数量级的碳纳米管（C）的纤维直径不小于5nm且不大于40nm的絮凝物是 均匀合成。

公开(公告)号：US20170352877A1

公开(公告)日：2017-12-07

申请号：US15538706

申请日：2015-12-11

Applicant: Umicore ,  Showa Denko K.K.

Inventor： Stijn PUT ,  Dirk VAN GENECHTEN ,  Kris DRIESEN ,  Jin HU ,  Yvan STRAUVEN ,  Arihiro MUTO ,  Nobuaki ISHII ,  Masataka TAKEUCHI

IPC: H01M4/36 ,  H01M10/04 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/38

CPC classification number: H01M4/364 ,  H01M4/386 ,  H01M4/625 ,  H01M10/0413 ,  H01M10/0525

Abstract: Composite powder for use in an anode of a lithium ion battery, whereby the particles of the composite powder comprise silicon-based domains in a matrix, whereby the individual silicon-based domains are either free silicon-based domains that are not or not completely embedded in the matrix or are fully embedded silicon-based domains that are completely surrounded by the matrix, whereby the percentage of free silicon-based domains is lower than or equal to 4 weight % of the total amount of Si in metallic or oxidized state in the composite powder.

公开(公告)号：US20150303460A1

公开(公告)日：2015-10-22

申请号：US14443927

申请日：2013-11-20

Applicant: SHOWA DENKO K.K.

Inventor： Hirokazu MURATA ,  Masataka TAKEUCHI ,  Nobuaki ISHII

IPC: H01M4/36 ,  H01M4/583 ,  H01M4/04 ,  C07F7/18 ,  H01M4/1393 ,  H01M10/0525 ,  H01M4/60

CPC classification number: H01M4/366 ,  C07F7/1892 ,  H01M4/0402 ,  H01M4/13 ,  H01M4/134 ,  H01M4/139 ,  H01M4/1393 ,  H01M4/1395 ,  H01M4/583 ,  H01M4/60 ,  H01M4/625 ,  H01M10/0525 ,  H01M2220/20

Abstract: A negative electrode material for use in a lithium-ion battery is obtained by a method comprising subjecting a carbon particle (B) comprising a graphite material or the like to surface treatment with an oxidizing agent and then removing a residue of the oxidizing agent, modifying the carbon particle (B) from which the residue of the oxidizing agent has been removed with a silane coupling agent, modifying a particle (A) comprising an element capable of occluding and releasing a lithium ion, such as a Si particle, with a silane coupling agent, linking the modified carbon particle (B) and the modified particle (A) via a chemical bond, and coating a composite particle comprising the particle (A) and the carbon particle (B) linked to the particle (A) via a chemical bond with carbon.

Abstract translation: 通过以下方法获得用于锂离子电池的负极材料，该方法包括使用氧化剂对包含石墨材料等的碳粒子（B）进行表面处理，然后除去氧化剂的残留物，修饰 用硅烷偶联剂除去氧化剂残余物的碳粒子（B），用硅烷改性包含能够吸留和释放锂离子的元素的粒子（A），如硅烷 偶联剂，通过化学键连接改性碳粒子（B）和改性粒子（A），并且通过经由A（A）与粒子（A）连接的粒子（A）和碳粒子 与碳化学键。

公开(公告)号：US20140272596A1

公开(公告)日：2014-09-18

申请号：US14047637

申请日：2013-10-07

Applicant: SHOWA DENKO K.K.

Inventor： Ryuji YAMAMOTO ,  Takeshi NAKAMURA ,  Nobuaki ISHII ,  Yuta HIRANO

IPC: H01M4/62

CPC classification number: H01M4/625 ,  H01M4/5825 ,  H01M10/052

Abstract: Provided is composite carbon fibers comprising multi-walled carbon nanotubes wherein 99% by number or more of the multi-walled carbon nanotubes have a fiber diameter of not less than 5 nm and not more than 40 nm, carbon particles having a primary particle diameter of not less than 20 nm and not more than 100 nm and graphitized carbon nanofibers wherein 99% by number or more of the graphitized carbon nanofibers have a fiber diameter of not less than 50 nm and not more than 300 nm, wherein the multi-walled carbon nanotubes are homogeneously dispersed between the graphitized carbon nanofibers and the carbon particles.

Abstract translation: 提供了包含多层碳纳米管的复合碳纤维，其中多壁碳纳米管的99质量％或更多的纤维直径不小于5nm且不大于40nm，具有一次粒径为 不小于20nm且不大于100nm的石墨化碳纳米纤维，其中99％或更多的石墨化碳纳米纤维的纤维直径不小于50nm且不大于300nm，其中多壁碳 纳米管均匀分散在石墨化碳纳米纤维和碳颗粒之间。

公开(公告)号：US20220209223A1

公开(公告)日：2022-06-30

申请号：US17672785

申请日：2022-02-16

Applicant: Umicore ,  Showa Denko K.K.

Inventor： Stijn PUT ,  Dirk VAN GENECHTEN ,  Jan GILLEIR ,  Nicolas MARX ,  Arihiro MUTO ,  Nobuaki ISHII ,  Masataka TAKEUCHI

IPC: H01M4/36 ,  H01M4/38 ,  H01M4/134 ,  C01B33/03 ,  C01B32/00 ,  C01B33/027 ,  H01M10/0525

Abstract: Powder comprising particles comprising a matrix material and silicon-based domains dispersed in this matrix material, whereby the matrix material is carbon or a material that can be thermally decomposed to carbon, whereby either part of the silicon-based domains are present in the form of agglomerates of silicon-based domains whereby at least 98% of these agglomerates have a maximum size of 3 μm or less, or the silicon-based domains are not at all agglomerated into agglomerates.

公开(公告)号：US20180287141A1

公开(公告)日：2018-10-04

申请号：US15764925

申请日：2016-10-01

Applicant: SHOWA DENKO K.K.

Inventor： Takayuki KURITA ,  Akira MATSUO ,  Nobuaki ISHII

IPC: H01M4/36 ,  H01M4/38 ,  H01M4/62 ,  H01M4/1395 ,  H01M4/134 ,  H01M10/0525

Abstract: A negative electrode for a lithium ion secondary battery including a laminated electrode layer and collector obtained by: mixing particles (A) composed of a substance including an element capable of intercalating and deintercalating lithium ions and containing no graphite, particles (B) composed of graphite, carbonaceous fibers (C), and a polymer (D) containing a polysaccharide and having a specified viscosity to obtain a granular composite in which each of particles (A) and each of carbonaceous fibers (C) contact with each other through the polymer (D) to be integrated, thereby forming a substructure (S), at least part of the particles (B) is covered with the substructure (S), and each of the particles (B) has contact with each other through the substructure (S); mixing a liquid medium, the granular composite and a binder to obtain slurry or paste; and allowing the slurry or the paste to adhere to the collector.

公开(公告)号：US20170256791A1

公开(公告)日：2017-09-07

申请号：US15329884

申请日：2015-07-27

Applicant: SHOWA DENKO K.K.

Inventor： Takayuki KURITA ,  Akira MATSUO ,  Nobuaki ISHII

IPC: H01M4/36 ,  C04B35/626 ,  H01M4/587 ,  C04B35/83 ,  H01M10/0525 ,  H01M4/38

CPC classification number: H01M4/364 ,  C04B35/6261 ,  C04B35/62685 ,  C04B35/83 ,  C04B2235/425 ,  C04B2235/428 ,  C04B2235/5288 ,  C04B2235/96 ,  H01M4/36 ,  H01M4/38 ,  H01M4/386 ,  H01M4/587 ,  H01M4/62 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027

Abstract: A negative electrode material for lithium ion secondary batteries, the negative electrode material including particles (A) containing an element capable of occluding/releasing lithium ions other than a carbon element; graphite particles (B) capable of occluding/releasing lithium ions and having a median value of not smaller than 1.4 and not larger than 3.0 in a number-based distribution of aspect ratios of primary particles and carbon fibers (C); wherein a three dimensional web structure is formed from one or more carbon fibers (C), the particles (A) are fusion-bonded to the structure, and the structure is fusion-bonded to at least a part of a surface of the graphite particle (B). Also disclosed is a lithium ion secondary battery obtained using the negative electrode material.

公开(公告)号：US20130295446A1

公开(公告)日：2013-11-07

申请号：US13875654

申请日：2013-05-02

Applicant: SHOWA DENKO K.K.

Inventor： Hirokazu MURATA ,  Nobuaki ISHII ,  Masataka TAKEUCHI ,  Mohit JAIN ,  Nader M. HAGH ,  Farid BADWAY ,  Krista MARTIN

IPC: H01M4/133 ,  H01M10/0569 ,  H01M10/0525 ,  H01M4/64

CPC classification number: H01M4/133 ,  H01B1/122 ,  H01M4/134 ,  H01M4/366 ,  H01M4/38 ,  H01M4/387 ,  H01M4/388 ,  H01M4/621 ,  H01M4/624 ,  H01M4/64 ,  H01M10/0525 ,  H01M10/0569 ,  Y02E60/122 ,  Y02P70/54 ,  Y02T10/7011

Abstract: A negative electrode material for a lithium ion battery, in which a fine particle (A) containing an element selected from Si, Sn, Ge and In and a carbon particle (B) obtained by heat-treating a petroleum-based coke and/or a coal-based coke at a temperature of 2,500° C. or more are connected through a chemical bond such as urethane bond, urea bond, siloxane bond and ester bond. Also disclosed are a negative electrode sheet obtained by coating a current collector with a paste containing the negative electrode material, a binder and a solvent, and then drying and pressure-forming the paste; and a lithium ion battery incorporating the negative electrode sheet.

Abstract translation: 一种锂离子电池用负极材料，其中含有选自Si，Sn，Ge和In的元素的细颗粒（A）和通过将石油基焦炭和/或 在2500℃以上的煤基焦炭通过氨基甲酸酯键，脲键，硅氧烷键和酯键等化学键连接。 还公开了通过用含有负极材料，粘合剂和溶剂的糊剂涂布集电体，然后干燥和加压形成糊料而获得的负极片材; 和包含负极片的锂离子电池。

公开(公告)号：US20190334162A1

公开(公告)日：2019-10-31

申请号：US16468907

申请日：2017-12-06

Applicant: SHOWA DENKO K.K.

Inventor： Takayuki KURITA ,  Masataka TAKEUCHI ,  Nobuaki ISHII

IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/62 ,  H01M10/0565 ,  C08L1/28 ,  C08L71/02

Abstract: A granular composite material, containing: particles (A) each formed of a substance which contains an element capable of intercalating and deintercalating lithium ions and is free of graphite; particles (B) each formed of a substance which contains graphite; carbon fibers (C); a polymer (D) containing a polysaccharide having an unsubstituted or substituted glucopyranose ring or a derivative thereof; and a solid electrolyte (E) containing a linear or branched polyether or a derivative thereof; a negative electrode obtained by laminating an electrode layer containing the granular composite material on a current collector; a method for producing the negative electrode; and a lithium ion secondary battery containing the negative electrode.