- Patent Title: Method to prepare composite graphite particles for nonaqueous secondary battery negative electrode, active material for nonaqueous secondary battery negative electrode, and nonaqueous secondary battery
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Application No.: US17643200Application Date: 2021-12-08
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Publication No.: US11605810B2Publication Date: 2023-03-14
- Inventor: Akio Ueda , Satoshi Akasaka , Nobuyuki Ishiwatari , Junko Kagimoto , Shingo Morokuma
- Applicant: Mitsubishi Chemical Corporation
- Applicant Address: JP Tokyo
- Assignee: Mitsubishi Chemical Corporation
- Current Assignee: Mitsubishi Chemical Corporation
- Current Assignee Address: JP Tokyo
- Agency: Obion, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2014-064534 20140326
- Main IPC: H01M4/36
- IPC: H01M4/36 ; H01M4/587 ; H01M4/133 ; H01M4/134 ; H01M10/0525 ; H01M4/38 ; H01M4/62 ; H01M10/0566
Abstract:
The invention relates to composite graphite particles for a nonaqueous secondary battery negative electrode containing graphite (A) and metal particles (B) capable of alloying with Li, wherein the degree of dispersion of the metal particles (B) in the composite graphite particles is 0.78 or more and the internal void fraction of the composite graphite particles is 3% or more and 40% or less.
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