COMPOSITE GRAPHITE PARTICLES, METHOD FOR PRODUCING SAME, AND USE THEREOF

WIPO Patent Application WO/2018/110263

A1

The present invention provides: composite graphite particles having a core material made of artificial graphite and a coating layer for covering the core material, the coating layer containing a non-powdery, amorphous carbon material and a powdery, conductive carbon material, wherein the ratio of the mass of the non-powdery, amorphous carbon material with respect to the mass of the core material is 0.2-3.8% by mass, and the ratio of the mass of the powdery, conductive carbon material with respect to the mass of the core material is 0.3-5.0% by mass; a method for producing the composite graphite particles, the method including adding 0.3-5.0 parts by mass of an amorphous carbon precursor and 0.3-5.0 parts by mass of a powdery, conductive carbon material per 100 parts by mass of artificial graphite, mixing while applying shear force, and firing the resulting mixture at 600-1,300°C; an electrode sheet having an electrode layer that contains the composite graphite particles; and a lithium ion secondary cell that includes the electrode sheet as a negative electrode. This lithium ion secondary cell has a low internal resistance value, exceptional input/output characteristics, and excellent cycle characteristics.

IKADO AYAKA (JP)
KONO DAISUKE (JP)
YOSHIOKA SHUNSUKE (JP)
WAKIZAKA YASUAKI (JP)
TONEGAWA AKIHISA (JP)
HARADA DAISUKE (JP)

PCT/JP2017/042420

June 21, 2018

November 27, 2017

Click for automatic bibliography generation  

SHOWA DENKO KK (JP)

C01B32/205; H01M4/133; H01M4/1393; H01M4/36; H01M4/587

WO2013002162A1

2013-01-03

JP2014060148A	2014-04-03
JP2016186912A	2016-10-27
JP2010218758A	2010-09-30

OHIE Kunihisa et al. (JP)

View/Download PDF      PDF Help

Previous Patent: RECOGNITION DEVICE

Next Patent: IMAGING DEVICE AND IMAGING METHOD