Title:
METHOD FOR PRODUCING GRAPHITIZED BULK MESOPHASE
Document Type and Number:
WIPO Patent Application WO/2020/251021
Kind Code:
A1
Abstract:
The present invention provides a method for producing a graphitized bulk mesophase which has a high discharge capacity per mass and enables the production of a lithium ion secondary battery negative electrode material having a small electrode expansion rate when charging and discharging are carried out continuously. The method for producing a graphitized bulk mesophase according to the present invention comprises: a heat treatment step of subjecting tar and/or pitch each having a primary QI (quinoline insoluble material) content of 1% by mass or less to a heat treatment to produce a bulk mesophase; a oxidative stabilization step of oxidatively stabilizing the bulk mesophase produced in the heat treatment step to produce an oxidatively stabilized bulk mesophase; a burning step of adding a graphitization catalyst to the oxidatively stabilized bulk mesophase produced in the oxidative stabilization step and then burning the oxidatively stabilized bulk mesophase to produce a burnt bulk mesophase; and a graphitization step of graphitizing the burnt bulk mesophase produced in the burning step to produce a graphitized bulk mesophase.
Inventors:
YAMAJI RYOTA (JP)
TOKITA SATOSHI (JP)
MADOKORO YASUSHI (JP)
TOKITA SATOSHI (JP)
MADOKORO YASUSHI (JP)
Application Number:
PCT/JP2020/023212
Publication Date:
December 17, 2020
Filing Date:
June 12, 2020
Export Citation:
Assignee:
JFE CHEMICAL CORP (JP)
International Classes:
C01B32/205; H01M4/587
Foreign References:
| JP2002362913A | 2002-12-18 | |||
| JP2001006670A | 2001-01-12 | |||
| JP2011003332A | 2011-01-06 | |||
| JP2007042611A | 2007-02-15 |
Attorney, Agent or Firm:
ITOH Hideaki et al. (JP)
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