Patent ID: 11936044
Assignee: MITSUBISHI CHEMICAL CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C  Y | IPC C  H

Claim 0:
1. A carbon material suitable for a non-aqueous secondary battery, the carbon material comprising:
a carbonaceous material; and
a spheroidized graphite which is at least one selected from the group consisting of flake graphite, crystalline graphite, and vein graphite,
wherein the carbon material is a composite carbon material capable of occluding and releasing lithium ions,
wherein the carbon material has a Raman R value of 0.2 or greater,
wherein the carbon material has a cumulative pore volume, at a pore diameter of from 0.01 μm to 1 μm, of 0.08 mL/g or more, determined by mercury intrusion,
wherein the carbon material has a roundness, as determined by a flow-type particle image analysis, of 0.88 or greater,
wherein the carbon material has a ratio of a pore diameter to a particle diameter, PD/d50(%), of 1.8 or less, the ratio following equation (1A):

PD/d50(%)=mode pore diameter (PD) in a pore diameter range of 0.01 μm to 1 μm in a pore distribution determined by mercury intrusion/volume-based average particle diameter (d50)×100  (1A),

wherein the carbon material has a true density in a range of from 1.9 to 2.26 g/cm3, and
wherein the carbon material has a half width at half maximum of pore distribution, log (nm), of 0.3 or greater, wherein the half width at half maximum of pore distribution, log (nm), is a half width at half maximum at a micropore side of a peak in a pore diameter range of from 0.01 μm to 1 μm in a pore distribution (nm), as determined by mercury intrusion porosimetry, of the carbon material for a non-aqueous secondary battery, with a horizontal axis expressed in common logarithm, log (nm).