Mitsubishi Chemical Corporation

Mu Ionic Solutions Corporation

Kunihisa Shima

Minoru Kotato

Masamichi Onuki

Shuhei Sawa

Yasuyuki Shigematsu

Kanako Takiguchi

Shinichi Kinoshita

Youichi Ohashi

Kazuki Watanabe

Takashi Fujii

Makoto Ue

Hiroyuki Tokuda

Kenji Shizuka

Atsushi Watarai

Koji Fukamizu

Daisuke Noda

Teppei Yamada

Asao Kominato

Masamichi Oonuki

An object is to provide a non-aqueous electrolyte solution that can improve the capacity deterioration and gas generation associated with the high-temperature storage of non-aqueous electrolyte batteries. A further object is to provide a non-aqueous electrolyte battery that uses this non-aqueous electrolyte solution. These objects can be achieved by using a non-aqueous electrolyte solution that incorporates, in prescribed contents, (A) a compound having at least two isocyanate groups per molecule and (B) a compound of formula (3):LiCFSO  (3)

Non-aqueous electrolyte solution and non-aqueous electrolyte secondary battery employing the same

Disclosed herein is a non-aqueous electrolyte secondary battery containing at least a positive electrode capable of the absorbing and releasing of a lithium ion, a negative electrode capable of the absorbing and releasing of the lithium ion, and a non-aqueous electrolyte solution containing a non-aqueous solvent and an electrolyte dissolved in the non-aqueous solvent, where

Disclosed herein is a non-aqueous electrolyte solution containing, in addition to an electrolyte and a non-aqueous solvent, (A) a compound having at least two isocyanate groups per molecule, and (B) LiN(FSO).

An object is to provide a non-aqueous electrolyte solution that can improve the capacity deterioration and gas generation associated with the high-temperature storage of non-aqueous electrolyte batteries. A further object is to provide a non-aqueous electrolyte battery that uses this non-aqueous electrolyte solution. These objects can be achieved by using a non-aqueous electrolyte solution that incorporates, in prescribed contents, (A) a compound having at least two isocyanate groups per molecule and a compound having at least two cyano groups per molecule.

The demand for improvements in lithium non-aqueous electrolyte secondary batteries has been constantly increasing in recent years, but the durability&#x2014;most prominently the cycle characteristics&#x2014;have resided in a trade off relationship with properties such as the capacity, resistance, and output characteristics. A problem has thus been a poor overall property balance. In order to solve this problem, the present invention uses a non-aqueous electrolyte solution including, in addition to an electrolyte and a non-aqueous solvent, (A) at least one compound selected from the group consisting of carbonates having a carbon-carbon unsaturated bond, compounds represented by the following general formula (1), sulfoxides, sulfites, sulfones, sulfonates, sultones, and sulfates; (B) a fluorine atom-containing cyclic carbonate; and (C) a compound that has at least two isocyanate groups in the molecule.

Provided are a nonaqueous electrolyte solution having improved durability properties in terms of cycling, storage and the like and improved discharge characteristic at a high current density, and a nonaqueous electrolyte battery that uses that nonaqueous electrolyte solution. The nonaqueous electrolyte solution containing a lithium salt and a nonaqueous solvent that dissolves the lithium salt, wherein the nonaqueous electrolyte solution contains a compound represented by formula (1) and at least one compound selected from the group consisting of a compound having a cyano group, a cyclic ester compound having a sulfur atom and a compound having an isocyanate group. 

Nonaqueous electrolytic solution and nonaqueous electrolyte secondary battery

The present invention relates to a nonaqueous electrolyte solution comprising a lithium salt and a nonaqueous organic solvent, wherein the nonaqueous electrolyte solution comprises a specific sulfonic acid ester.

Nonaqueous electrolyte solution and nonaqueous electrolyte battery using same

A non-aqueous electrolyte solution including a lithium salt, a non-aqueous solvent, a cyclic carbonate compound having an unsaturated bond and a compound of formula R&#x2014;S(O)&#x2014;F in which Ris an alkyl group having from 1 to 12 carbon atoms that may be substituted by a fluorine atom or an alkenyl group having from 2 to 12 carbon atoms that may be substituted by a fluorine atom, and the alkyl group or alkenyl group may have an ether linkage within its chain.

Nonaqueous electrolyte solution and lithium secondary battery using same

A non-aqueous electrolyte solution for a non-aqueous electrolyte secondary battery that has a positive electrode and a negative electrode capable of the absorbing and releasing of a metal ion, and a separator, the non-aqueous electrolyte solution comprising, in addition to an electrolyte and a non-aqueous solvent, 0.01 mass % or more to less than 3 mass % of a compound having one or more partial structure represented by the following general formula (1) and two or more isocyanate groups in the molecule: (In the general formula (1), R represents hydrogen or a C-Corganic group that may contain an isocyanate group and is constituted of atoms selected from the group consisting of hydrogen atom, carbon atom, nitrogen atom, oxygen atom, sulfur atom, phosphorus atom, and halogen atom).

Non-aqueous electrolyte for secondary battery and non-aqueous electrolyte secondary battery employing the same

A subject for the invention is to provide an electrolyte solution and a secondary battery which are prevented from causing or suffering battery performance deterioration in high-temperature storage or high-temperature trickle charge. The invention relates to a nonaqueous electrolyte solution for a secondary battery which comprises solute, phosphinic ester compound, and nonaqueous organic solvent containing these, characterized in that the content of the phosphinic ester compound has been regulated to a specific amount based on the total weight of the nonaqueous electrolyte solution.

Nonaqueous electrolyte solution and nonaqueous electrolyte solution secondary battery employing the same

A non-aqueous electrolyte solution that contains an organic solvent, and a lithium salt and an electrolyte, that is useful for the preparation of a secondary battery that is equipped with a negative electrode and a positive electrode, each of which is capable of storing and releasing lithium, wherein the non-aqueous electrolyte solution contains partially hydrogenated terphenyl that is a mixture of two or more compounds of which one is diphenylcyclohexane that is present in an amount ranging from 10 to 65 wt % of the partially hydrogenated terphenyl and the partially hydrogenated terphenyl has a solubility of not less than 0.5 wt % in the electrolyte solution at room temperature.

Non-aqueous electrolyte solution and non-aqueous electrolyte solution secondary battery using the same

An object of the invention is to provide such a battery that has a high capacity, is excellent in storage characteristics, cycle characteristics and continuous charging characteristics, and is small in gas generation amount, whereby size reduction and improvement in performance of a lithium secondary battery can be attained. The present invention relates to a nonaqueous electrolytic solution comprising a lithium salt and a nonaqueous solvent dissolving the same, wherein the electrolytic solution contains, as the lithium salt, LiPFin a concentration of from 0.2 to 2 mole/L, and LiBFand/or a compound represented by the following formula (1) in a molar ratio of from 0.005 to 0.4 with respect to LiPF, and the nonaqueous solvent mainly comprises (1) ethylene carbonate and/or propylene carbonate, (2-1) a symmetric linear carbonate, (2-2) an asymmetric linear carbonate, and (3) vinylene carbonate.

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Yokkaichi, Japan

Kunihisa Shima