- Patent Title: Negative electrode material for lithium-ion secondary battery, method for manufacturing negative electrode material for lithium-ion secondary battery, negative electrode material slurry for lithium-ion secondary battery, negative electrode for lithium-ion secondary battery, and lithium-ion secondary battery
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Application No.: US16166735Application Date: 2018-10-22
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Publication No.: US10601044B2Publication Date: 2020-03-24
- Inventor: Hideyuki Tsuchiya , Takashi Sakamoto , Takeshi Masayoshi
- Applicant: HITACHI CHEMICAL COMPANY, LTD.
- Applicant Address: JP Tokyo
- Assignee: HITACHI CHEMICAL COMPANY, LTD.
- Current Assignee: HITACHI CHEMICAL COMPANY, LTD.
- Current Assignee Address: JP Tokyo
- Agency: Fitch, Even, Tabin & Flannery, L.L.P.
- Priority: JP2014-062431 20140325
- Main IPC: H01M4/587
- IPC: H01M4/587 ; C01B32/20 ; H01M4/04 ; H01M4/133 ; H01M4/62 ; H01M10/0525 ; H01M4/02
Abstract:
A negative electrode material for a lithium-ion secondary battery, in which the negative electrode material includes a composite particle including a spherical graphite particle and plural graphite particles that have a compressed shape and that aggregate or are combined so as to have nonparallel orientation planes, and the negative electrode material has an R-value in a Raman measurement of from 0.03 to 0.10, and has a pore volume as obtained by mercury porosimetry of from 0.2 mL/g to 1.0 mL/g in a pore diameter range of from 0.1 μm to 8 μm.
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