Title:
非水電解質二次電池用負極活物質、非水電解質二次電池用負極、及び非水電解質二次電池、並びに負極活物質粒子の製造方法
Document Type and Number:
Japanese Patent JP6548959
Kind Code:
B2
Abstract:
The present invention is a negative electrode active material for a non-aqueous electrolyte secondary battery, including: negative electrode active material particles that contain a silicon compound (SiO x : 0.5 ¤ x ¤ 1.6) containing a Li compound; wherein the silicon compound is at least partially coated with a carbon coating, the negative electrode active material particles are coated with a coating composed of at least one of a compound having a boron-fluorine bond and a compound having a phosphorous-fluorine bond on at least a part of the surface of either or both of the silicon compound and the carbon coating, the negative electrode active material particles contain a boron element or a phosphorous element in a range of 10 ppm by mass to 10000 ppm by mass with respect to the total amount of the negative electrode active material particles. This provides a negative electrode active material for a non-aqueous electrolyte secondary battery that can increase the battery capacity and improve the cycle performance and the battery initial efficiency.
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Inventors:
Takushi Matsuno
Hiromichi Kamo
Kiichi Hirose
Hiroki Yoshikawa
Hiromichi Kamo
Kiichi Hirose
Hiroki Yoshikawa
Application Number:
JP2015112085A
Publication Date:
July 24, 2019
Filing Date:
June 02, 2015
Export Citation:
Assignee:
Shin-Etsu Chemical Co., Ltd.
International Classes:
H01M4/36; H01M4/48; H01M4/58
Domestic Patent References:
| JP2012164624A |
Foreign References:
| WO2015025443A1 | ||||
| CN103647056A | ||||
| WO2014065417A1 |
Attorney, Agent or Firm:
Mikio Yoshimiya