Title:
リチウムイオン二次電池
Document Type and Number:
Japanese Patent JP7072551
Kind Code:
B2
Abstract:
A lithium-ion secondary battery with no negative electrode active material is provided. One embodiment of the present invention is a lithium-ion secondary battery including a positive electrode, a negative electrode, an electrolyte solution, and a separator between the positive electrode and the negative electrode. The negative electrode includes a negative electrode current collector which includes a region in direct contact with at least one of the electrolyte solution and the separator. The electrolyte solution contains fluorine. The negative electrode current collector has a function of making a deposit containing lithium to be deposited on a surface in charging. Furthermore, a spacer may be provided between the separator and the negative electrode. The electrolyte solution may contain an organic compound containing fluorine. Supply of fluorine from the electrolyte solution to lithium deposited on the surface of the negative electrode can suppress deposition of lithium dendrites (whiskers) in further deposition.
Inventors:
Naoki Kurihara
Junpei Momo
Ryota Tajima
Junpei Momo
Ryota Tajima
Application Number:
JP2019211220A
Publication Date:
May 20, 2022
Filing Date:
November 22, 2019
Export Citation:
Assignee:
Semiconductor Energy Laboratory Co., Ltd.
International Classes:
H01M10/052; H01M10/0567; H01M10/0568; H01M10/058; H01M50/491; H01M50/489
Domestic Patent References:
| JP2013073846A | ||||
| JP2012256581A | ||||
| JP2012018914A | ||||
| JP2014035956A | ||||
| JP2001068162A | ||||
| JP5036401A | ||||
| JP2002298921A |
Foreign References:
| WO2011135613A1 |