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.

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：US20230231111A1

公开(公告)日：2023-07-20

申请号：US17927785

申请日：2021-05-28

Applicant: SHOWA DENKO K.K.

Inventor： Takayuki KURITA ,  Kohei AKIMOTO ,  Yuji ITO ,  Hirofumi INOUE ,  Jinseok BAEK

IPC: H01M4/36 ,  H01M4/587 ,  H01M4/38 ,  H01M4/133 ,  H01M10/0525 ,  H01M4/62 ,  C01B32/336 ,  C01B32/318

CPC classification number: H01M4/366 ,  H01M4/587 ,  H01M4/386 ,  H01M4/133 ,  H01M10/0525 ,  H01M4/625 ,  H01M4/622 ,  C01B32/336 ,  C01B32/318 ,  H01M2004/027

Abstract: Composite carbon particles including a porous carbon material and a silicon component, the composite carbon particle having an average aspect ratio of 1.25 or less, and a ratio (ISi/IG) of a peak intensity (ISi) in the vicinity of 470 cm−1 to a peak intensity (IG) in the vicinity of 1580 cm−1 as measured by Raman spectroscopy of 0.30 or less, wherein the porous carbon material satisfies V1/V0>0.80 and V2/V0

公开(公告)号：US20230207780A1

公开(公告)日：2023-06-29

申请号：US17927591

申请日：2021-05-28

Applicant: SHOWA DENKO K.K.

Inventor： Takayuki KURITA ,  Yuji ITO ,  Hirofumi INOUE

IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/583 ,  H01M4/38 ,  H01M4/62 ,  H01M4/04

CPC classification number: H01M4/364 ,  H01M10/0525 ,  H01M4/583 ,  H01M4/386 ,  H01M4/622 ,  H01M4/625 ,  H01M4/0404 ,  H01M2004/027

Abstract: A negative electrode material for a lithium-ion secondary battery containing a composite (C) that contains a porous carbon (A) and a Si-containing compound (B). The porous carbon (A) satisfies V1/V0>0.80 and V2/V0