Patent ID: 11942641
Assignee: SUMITOMO BAKELITE CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C  Y | IPC H

Claim 0:
1. A method for producing carbonaceous substance-coated graphite particles, the method comprising:
obtaining resin-adhered graphite particles by causing a modified novolac-type phenolic resin to adhere to graphite particles; and
coating at least part of surfaces of the graphite particles with a carbonaceous coating by heating the resin-adhered graphite particles in a non-oxidizing atmosphere at 900 to 1,500° C. to carbonize the modified novolac-type phenolic resin,
wherein arylene groups having hydroxy groups account for 5 to 95 mol % of arylene groups constituting the modified novolac-type phenolic resin, and
wherein in the carbonaceous substance-coated graphite particles,
an amount of carbonaceous coating is in a range of 0.1 to 15.0 parts of mass, with respect to 100 parts of mass of graphite particle,
a particle diameter D50 is 3.0 to 20.0 μm,
a specific surface area determined by BET method is 4.0 to 15.0 m2/g,
a pore specific surface area SAa of pores having pore sizes of 1 to 4 nm determined by BJH method is 1.85 to 12.50 m2/g, and
a ratio of a pore specific surface area SAb of pores having pore sizes of 4 to 150 nm determined by BJH method to the pore specific surface area SAa (SAb/SAa) is 0.20 to 1.29.