Title:
非水電解質二次電池
Document Type and Number:
Japanese Patent JP6876996
Kind Code:
B2
Abstract:
A positive electrode, a negative electrode, and a non-aqueous electrolyte. The negative electrode includes a negative electrode material, a binder, and a thickener, and the negative electrode material includes a lithium silicate phase, and Si particles dispersed in the lithium silicate phase. The ratio of the Si particles in the negative electrode material is 30 mass % or more. The binder includes a poly(meth)acrylic acid, the thickener includes a carboxyalkyl cellulose, and the amount of the poly(meth)acrylic acid relative to 100 parts by mass of the negative electrode material is 0.1 parts by mass or more and 5 parts by mass or less. The non-aqueous electrolyte includes a lithium salt, a non-aqueous solvent, and an acid that exhibits a pKa of 1 to 30 in water at 25° C. The non-aqueous electrolyte secondary battery can suppress the generation of gas during high-temperature storage, and secure excellent cycle characteristics.
Inventors:
Hitoshi Nishitani
Hiroyuki Minami
Masaki Deguchi
Hiroyuki Minami
Masaki Deguchi
Application Number:
JP2018559099A
Publication Date:
May 26, 2021
Filing Date:
December 20, 2017
Export Citation:
Assignee:
Panasonic IP Management Co., Ltd.
International Classes:
H01M10/0567; H01M4/36; H01M4/48; H01M4/587; H01M4/62; H01M10/052
Domestic Patent References:
| JP2006140115A | ||||
| JP2011233351A |
Foreign References:
| WO2016121322A1 | ||||
| WO2016035290A1 | ||||
| WO2015098050A1 |
Attorney, Agent or Firm:
Kawasaki/Hashimoto Patent Office