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Title:
SYNTHETIC GRAPHITE MATERIAL, SYNTHETIC GRAPHITE MATERIAL PRODUCTION METHOD, NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY, AND LITHIUM ION SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2020/149250
Kind Code:
A1
Abstract:
A synthetic graphite material wherein the crystal grain size L(112) in the c-axis direction as calculated from a (112) diffraction line obtained by wide-angle X-ray diffraction is 4-30nm, the surface area based on volume as calculated by a laser diffraction-type particle size distribution measurement device is 0.22-1.70m2/cm3, the oil absorption is 67-147mL/100g, the spectra derived from carbon that appear in an electron spin resonance method measured by using the X band is within the range 3200-3410gauss, and ΔHpp, which is the spectral line width calculated from the first derivative spectra for said spectra at the temperature of 4.8K, is 41-69gauss.

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Inventors:
SUZUKI TAKASHI (JP)
MAEDA TAKASHI (JP)
KARAKANE MITSUO (JP)
SHIRAI TAKAHIRO (JP)
KAWACHI HIROSHI (JP)
KIUCHI NORIYUKI (JP)
Application Number:
PCT/JP2020/000810
Publication Date:
July 23, 2020
Filing Date:
January 14, 2020
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Assignee:
JXTG NIPPON OIL & ENERGY CORP (JP)
International Classes:
C01B32/205; B01J27/19; C10B57/04; C10G45/08; H01M4/587
Domestic Patent References:
WO2012020816A12012-02-16
Foreign References:
JP2017019915A2017-01-26
JP2012128973A2012-07-05
JP2016164862A2016-09-08
JP2012216545A2012-11-08
JP2019004664A2019-01-10
JPS5415684B21979-06-16
JP2013209528A2013-10-10
JP2013209529A2013-10-10
Other References:
CARBON, no. 47, 1966
See also references of EP 3912959A4
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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