Title:
LITHIUM-ION SECONDARY CELL
Document Type and Number:
WIPO Patent Application WO/2019/021940
Kind Code:
A1
Abstract:
The present invention provides a lithium-ion secondary cell with which it is possible to obtain improved cycle characteristics even if the end-of-charge voltage is raised to 4.41 V or higher. The present invention pertains to a laminated-type lithium-ion secondary cell that includes a laminated-type electrode assembly in which positive electrodes having a positive electrode active material layer and negative electrodes having a negative electrode active material layer are alternately laminated in a flat shape with separators interposed therebetween, and that has an end-of-charge column of 4.41-4.47 V, wherein the area ratio of an entire negative electrode active material layer relative to the area of a part at which a positive electrode active material layer and a negative electrode active material layer face each other is 100.5-104.0%, the gap between a positive electrode and a negative electrode is 0.1-0.5 mm, and the discharge capacity per unit area of a positive electrode active material contained in the positive electrode active material layers is 169.0-178.0 mAh/g.
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Inventors:
KAWAI TORU (JP)
Application Number:
PCT/JP2018/027153
Publication Date:
January 31, 2019
Filing Date:
July 19, 2018
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H01M10/0585; H01M4/131; H01M4/133; H01M10/0525; H01M10/0569
Domestic Patent References:
| WO2016129527A1 | 2016-08-18 | |||
| WO2015151375A1 | 2015-10-08 |
Foreign References:
| JP2006236994A | 2006-09-07 | |||
| JP2014093271A | 2014-05-19 | |||
| JP2015076389A | 2015-04-20 |
Attorney, Agent or Firm:
YAMAO, Norihito et al. (JP)
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