Title:
二次電池用負極、二次電池、電池パック、電動車両、電力貯蔵システム、電動工具および電子機器
Document Type and Number:
Japanese Patent JP7056638
Kind Code:
B2
Abstract:
A secondary battery includes a negative electrode including a plurality of first negative electrode active material particles, second negative electrode active material particles, and a negative electrode binder. The first negative electrode active material particles include a carbon material, and the second negative electrode active material particles include a silicon material. The negative electrode binder includes polyvinylidene fluoride and at least a part of the negative electrode binder is provided on a part of the surface of each of the second negative electrode active material particles. A ratio M2/M1 of an abundance M2 of the negative electrode binder on the surface and in proximity to each of the second negative electrode active material particles to an abundance M1 of the negative electrode binder on the surface and in proximity to each of the first negative electrode active material particles is larger than 1.
Inventors:
Tadashi Matsushita
Mitsuhiro Ue
Kurakizuka Maki
Mitsuhiro Ue
Kurakizuka Maki
Application Number:
JP2019232734A
Publication Date:
April 19, 2022
Filing Date:
December 24, 2019
Export Citation:
Assignee:
MURATA MANUFACTURING CO.,LTD.
International Classes:
H01M4/13; H01M4/02; H01M4/133; H01M4/134; H01M4/36; H01M4/38; H01M4/48; H01M4/62; H01M10/052; H01M10/0566; H01M50/202; H01M50/284
Domestic Patent References:
| JP6966422B2 | ||||
| JP2015230748A | ||||
| JP2016024934A | ||||
| JP2013187033A | ||||
| JP2014044921A |
Attorney, Agent or Firm:
Patent Business Corporation Tsubasa International Patent Office
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