Title:
リチウムイオン二次電池
Document Type and Number:
Japanese Patent JP6668848
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a lithium ion secondary battery which has superior charge and discharge cycle characteristics even in the case of using a positive electrode active material showing a high operating potential.SOLUTION: A lithium ion secondary battery comprises: a positive electrode including a lithium manganese nickel composite oxide as a positive electrode active material; a negative electrode including a lithium titanium composite oxide as a negative electrode active material; and an electrolyte solution containing an organic solvent with a lithium salt dissolved therein. The electrolyte solution contains dimethyl carbonate, the content of the dimethyl carbonate is over 70 vol.% to a total volume of the electrolyte solution. The lithium ion secondary battery further comprises a surface coating layer including an inorganic component on the negative electrode; the surface coating layer is 45 nm or less in thickness.SELECTED DRAWING: None
Inventors:
Takuya Nishimura
Katsunori Kojima
Yugo Gogo
Katsunori Kojima
Yugo Gogo
Application Number:
JP2016051209A
Publication Date:
March 18, 2020
Filing Date:
March 15, 2016
Export Citation:
Assignee:
Hitachi Chemical Co., Ltd.
International Classes:
H01M10/0525; H01M4/131; H01M4/485; H01M4/505; H01M4/525; H01M10/0568; H01M10/0569
Domestic Patent References:
| JP2010231960A | ||||
| JP2015201335A |
Foreign References:
| US20150004475 | ||||
| US20150180023 |
Attorney, Agent or Firm:
Patent Service Corporation Taiyo International Patent Office