Title:
NEGATIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERIES, NEGATIVE ELECTRODE MATERIAL SLURRY FOR LITHIUM ION SECONDARY BATTERIES, NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERIES, AND LITHIUM ION SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2019/026265
Kind Code:
A1
Abstract:
This negative electrode material for lithium ion secondary batteries contains composite particles, each of which contains at least two flattened graphite particles or at least one spherical graphite particle and at least two flattened graphite particles, and each of which has a structure wherein at least two flattened graphite particles are assembled or bonded so that the orientation surfaces thereof are not parallel to each other. This negative electrode material for lithium ion secondary batteries has a specific surface area of from 1.0 m2/g to 3.0 m2/g as determined by a BET method utilizing nitrogen gas adsorption, a pellet density of from 1.30 g/cm3 to 1.60 g/cm3, and a pore volume of 0.47 mL/g or less in the pore diameter range of from 2 μm to 10 μm as determined by mercury intrusion porosimetry.
Inventors:
NAKAMURA YU (JP)
NISHIDA TATSUYA (JP)
SAKAMOTO TAKASHI (JP)
MIYAUCHI TAKAYUKI (JP)
ONODA MASANORI (JP)
NISHIDA TATSUYA (JP)
SAKAMOTO TAKASHI (JP)
MIYAUCHI TAKAYUKI (JP)
ONODA MASANORI (JP)
Application Number:
PCT/JP2017/028329
Publication Date:
February 07, 2019
Filing Date:
August 03, 2017
Export Citation:
Assignee:
HITACHI CHEMICAL CO LTD (JP)
International Classes:
H01M4/587
Domestic Patent References:
| WO1998006679A1 | 1998-02-19 | |||
| WO2007000982A1 | 2007-01-04 | |||
| WO2012077653A1 | 2012-06-14 |
Foreign References:
| JP2017062991A | 2017-03-30 | |||
| JP2017062992A | 2017-03-30 | |||
| JP2002289190A | 2002-10-04 |
Attorney, Agent or Firm:
TAIYO, NAKAJIMA & KATO (JP)
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