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Non-aqueous electrolytic solution for lithium secondary battery or lithium ion capacitor, and lithium secondary battery or lithium ion capacitor using the same

專利號
US10868336B2
公開日期
2020-12-15
申請人
UBE INDUSTRIES, LTD.（JP Ube）
發(fā)明人
Koji Abe; Makoto Babazono; Masahide Kondo; Hiroshi Yanagi; Kei Shimamoto
IPC分類
H01M10/0569; H01G11/60; H01M10/052; H01G11/06; H01G11/62; H01M4/36; H01M4/505; H01M4/525; H01M10/0525; H01M10/0568; H01M10/0567; H01M4/38; H01M4/58; H01M4/485; H01G11/32; H01G11/50; H01M4/587
技術(shù)領(lǐng)域
aqueous,lithium,lipf6,carbonate,1.1m,non,electrode,in,battery,or
地域： Ube-shi

摘要

The present invention provides a non-aqueous electrolytic solution for a lithium secondary battery or a lithium ion capacitor, wherein the non-aqueous electrolytic solution includes a lithium salt as dissolved in a non-aqueous solvent in a concentration of 0.8 to 1.5 M (mol/L), the non-aqueous solvent includes, in relation to the whole of the non-aqueous solvent, 5 to 25% by volume of ethylene carbonate, 5 to 25% by volume of propylene carbonate, 20 to 30% by volume of dimethyl carbonate, 20 to 40% by volume of methyl ethyl carbonate, and 10 to 20% by volume of a fluorinated chain ester; the total content of ethylene carbonate and propylene carbonate in the non-aqueous solvent is 20 to 30% by volume, the total content of dimethyl carbonate and the fluorinated chain ester in the non-aqueous solvent is 30 to 40% by volume; and the flash point of the non-aqueous electrolytic solution is 20° C. or higher, and the present invention also provides an energy storage device.

說明書

The lithium ion capacitor of the present invention is an energy storage device for storing energy by utilizing the intercalation of lithium ions into a carbon material such as graphite serving as a negative electrode. The lithium ion capacitor of the present invention includes a positive electrode, a negative electrode, and a non-aqueous electrolytic solution according to the first aspect of the present invention including a lithium salt as dissolved in a non-aqueous solvent and a non-aqueous electrolytic solution according to the second aspect of the present invention including a lithium salt as dissolved in a non-aqueous solvent. It is referred to as a lithium ion capacitor (LIC). Examples of the positive electrode include: a lithium ion capacitor utilizing an electric double layer between an activated carbon electrode and an electrolytic solution, and a lithium ion capacitor utilizing the doping/dedoping reaction of a n-conjugated polymer electrode. In the electrolytic solution, at least a lithium salt such as LiPF6 is included. In addition, as a negative electrode, the same negative electrode as the negative electrode of the aforementioned lithium secondary battery can be used.

EXAMPLES

Hereinafter, Examples of the non-aqueous electrolytic solution of the present invention are shown, but the present invention is not limited to these Examples.

Examples 1 to 14, and Comparative Examples 1 to 8

[Measurements of Physical Properties of Non-Aqueous Electrolytic Solution]

<Measurement of Flash Point>

權(quán)利要求

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