Title:
LITHIUM ION SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2017/179411
Kind Code:
A1
Abstract:
Provided is a lithium ion secondary battery which has a long service life.
A lithium ion secondary battery which is provided with an electrolyte solution containing (FSO2)2NLi and a chain carbonate represented by general formula (A) and a negative electrode containing a negative electrode active material, and which is characterized in that substances having a length of 30 nm or more are present in the surface of the negative electrode active material at a density within the range of from 0 substances/μm2 (inclusive) to 80 substances/μm2 (exclusive).
R20OCOOR21 General formula (A)
(In the formula, each of R20 and R21 independently represents a group selected from among chain alkyl groups represented by CnHaFbClcBrdIe and groups that contain a cyclic alkyl group in the chemical structures and are represented by CmHfFgClhBriIj; n represents an integer of 1 or more; m represents an integer of 3 or more; and each one of a, b, c, d, e, f, g, h, i and j independently represents an integer of 0 or more, while satisfying (2n + 1) = (a + b + c + d + e) and (2m - 1) = (f + g + h + i + j).)
Inventors:
NAKAGAKI YOSHIHIRO (JP)
KAWAI TOMOYUKI (JP)
SASAKI HIROYUKI (JP)
KAWAI TOMOYUKI (JP)
SASAKI HIROYUKI (JP)
Application Number:
PCT/JP2017/012611
Publication Date:
October 19, 2017
Filing Date:
March 28, 2017
Export Citation:
Assignee:
UNIV TOKYO (JP)
International Classes:
H01M10/0568; H01M10/052; H01M10/0569; H01M10/058
Domestic Patent References:
| WO2015045387A1 | 2015-04-02 |
Foreign References:
| JP2015195165A | 2015-11-05 | |||
| JP2016001586A | 2016-01-07 | |||
| JP2015133315A | 2015-07-23 |
Attorney, Agent or Firm:
KYORITSU INTERNATIONAL (JP)
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