Asahi Kasei E-materials Corporation

Asahi Kasei Kabushiki Kaisha

Yamaguchi University

Asami Ohashi

Yoshiyuki Ishii

Masato Murakami

Shinya Hamasaki

Hiroaki Okamoto

Yuki Morita

Yusuke Shigemori

Fumiaki Ozaki

An electrolyte containing a non-aqueous solvent, a lithium salt (A) and at least one compound (B) selected from the group consisting of a compound represented by the following formula (1), a compound represented by the following formula (2) and a compound having a constitutional unit represented by the following formula (3a) and a constitutional unit represented by the following formula (3b).

Electrolyte and lithium-ion secondary battery

The present invention provides an electrolyte solution and a lithium ion secondary battery which maintain for a long period high battery characteristics represented by the discharge capacity retention rate after the charge/discharge cycle, and simultaneously achieve also the high safety represented by the flame retardation. The present invention provides an electrolyte solution containing a nonaqueous solvent, an electrolyte, a specific compound having a perfluoroalkyl group in the molecule, and an additive having a fluorine atom and/or a phosphorus atom in the molecule.

Electrolyte solution and lithium ion secondary battery using the same

The electrolyte solution for a lithium ion secondary battery according to the present invention contains a nonaqueous solvent, a lithium salt and a compound represented by the general formula (Z) shown below. Thereby, a lithium ion secondary battery having high battery characteristics and simultaneously achieving a high safety as well can be provided.R&#x2014;SO&#x2014;Ar&#x2014;O&#x2014;R&#x2003;&#x2003;(Z)wherein Ardenotes a substituted or nonsubstituted divalent aromatic group having 5 to 30 atoms of the nucleus(es); Rdenotes a saturated or unsaturated monovalent hydrocarbon group having 1 to 20 carbon atoms; and R denotes a saturated or unsaturated monovalent hydrocarbon group having a perfluoroalkyl group and having 2 to 22 carbon atoms.

Electrolyte solution for lithium ion secondary battery, lithium ion secondary battery, fluoroalkane derivative and gelling agent

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Tokyo, Japan

Asami Ohashi