Title:
LITHIUM ION SECONDARY CELL
Document Type and Number:
WIPO Patent Application WO/2018/029907
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a lithium ion secondary cell having excellent durability. A lithium ion secondary cell is provided with a positive electrode equipped with a collector made of aluminum, a negative electrode equipped with an Si-containing negative electrode active material, and an electrolyte, the lithium ion secondary cell characterized in that the electrolyte contains a lithium salt and a chain carbonate represented by general formula (1), the mol ratio of the chain carbonate to the lithium salt is within the range of 2-6, and the lithium salt contains a first lithium salt selected from general formula (A) to general formula (D); and/or the electrolyte contains a lithium salt and a chain carbonate represented by the general formula (1), the concentration of the lithium salt is 1.5-3.5 mol/L, and the lithium salt contains a first lithium salt selected from general formula (A) to general formula (D). R10OCOOR11 General formula (1) LiPF6-y(X)y (where y is an integer of 0-5) General formula (A) LiBF4-y(X)y (where y is an integer of 0-3) General formula (B) LiAsF6-y(X)y (where y is an integer of 0-5) General formula (C) Li2SiF6-y(X)y (where y is an integer of 0-5) General formula (D)
Inventors:
KAWAMOTO YUTA (JP)
MAKI TAKESHI (JP)
KAWAI TOMOYUKI (JP)
ICHIKAWA YUKI (JP)
SAKAMOTO SHUNYA (JP)
MAKI TAKESHI (JP)
KAWAI TOMOYUKI (JP)
ICHIKAWA YUKI (JP)
SAKAMOTO SHUNYA (JP)
Application Number:
PCT/JP2017/015219
Publication Date:
February 15, 2018
Filing Date:
April 14, 2017
Export Citation:
Assignee:
TOYOTA JIDOSHOKKI KK (JP)
International Classes:
H01M10/052; H01M4/13; H01M4/134; H01M4/36; H01M4/38; H01M4/505; H01M4/525; H01M4/58; H01M4/62; H01M4/66; H01M10/0568; H01M10/0569
Domestic Patent References:
| WO2013128559A1 | 2013-09-06 | |||
| WO2014080608A1 | 2014-05-30 | |||
| WO2016063882A1 | 2016-04-28 | |||
| WO2015056412A1 | 2015-04-23 |
Foreign References:
| JP2016085838A | 2016-05-19 | |||
| JP2004319390A | 2004-11-11 | |||
| JP2009163971A | 2009-07-23 | |||
| JPH05326016A | 1993-12-10 |
Attorney, Agent or Firm:
KYORITSU INTERNATIONAL (JP)
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