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.