Title:
負極活物質材料、負極及び電池
Document Type and Number:
Japanese Patent JP6627974
Kind Code:
B2
Abstract:
A negative electrode active material is provided that is utilized in a nonaqueous electrolyte secondary battery, and that can improve the capacity per volume and charge-discharge cycle characteristics. The negative electrode active material according to the present embodiment contains an alloy having a chemical composition consisting of, in at %, Sn: 10.0 to 22.5% and Si: 10.5 to 23.0%, with the balance being Cu and impurities. The alloy has at least one type of phase among an η′ phase, an ε phase and a Sn phase in a Cu—Sn binary phase diagram, and the micro-structure of the alloy includes reticulate regions 20, and island-like regions 10 that are surrounded by the reticulate regions 20. The average size of the island-like regions 10 is, in equivalent circular diameter, 900 nm or less.
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Inventors:
Yuyoshi Yamamoto
Tatsuo Nagata
Koji Moriguchi
Tatsuo Nagata
Koji Moriguchi
Application Number:
JP2018521738A
Publication Date:
January 08, 2020
Filing Date:
June 06, 2017
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
C22C9/02; B22F1/00; C22C9/10; H01M4/38
Domestic Patent References:
| JP2015159081A | ||||
| JP2503071A | ||||
| JP2017091662A |
Foreign References:
| WO2015129270A1 | ||||
| WO2003079469A1 | ||||
| WO2007015508A1 | ||||
| WO2017200046A1 |
Attorney, Agent or Firm:
Ascend Patent Business Corporation