Mitsubishi Chemical Corporation

Mu Ionic Solutions Corporation

Kanako Takiguchi

Masamichi Onuki

Minoru Kotato

Shuhei Sawa

Kunihisa Shima

Yasuyuki Shigematsu

Takayuki Aoshima

Tsuyoshi Inoue

Ryo Yamaguchi

Yasushi Oura

Masami Iwahori

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.

Provided is a nonaqueous electrolyte solution battery with dramatically improved battery characteristics. A nonaqueous electrolyte solution battery prepared by using a nonaqueous electrolyte solution comprising (I) an aromatic carboxylic acid ester compound represented by General Formula (1) below; and (II) specific compounds, is improved in charge-discharge characteristics at high current densities, durability performance during high-temperature storage and overcharge characteristics. (in General Formula (1), Ais &#x2014;Ror &#x2014;OR, with Rbeing an optionally substituted hydrocarbon group with 10 or fewer carbon atoms; Ais an optionally substituted aryl group; each of j and k is independently 0 or an integer greater than 0, and at least one of j and k is an integer not less than 1; and when k&#x2265;1, Ais &#x2014;OR, while when k=0, Ais &#x2014;R; and the case of j=1, k=0 is not allowed).

Nonaqueous electrolyte solution and nonaqueous electrolyte battery employing the same

A nonaqueous electrolyte solution includes a lithium salt and a nonaqueous solvent that dissolves the lithium salt. The nonaqueous electrolyte solution contains from at least 0.01 ppm to not more than 100 ppm of a compound represented by the following general formula (1):R&#x2014;CROR&#x2014;CROR&#x2003;&#x2003;(1)(in formula (1), Rand Rrepresent an organic group having 1 to 10 carbon atoms and optionally having a substituent; Rrepresents hydrogen or an organic group having 1 to 10 carbon atoms and optionally having a substituent; and Rto Rmay each represent the same group or may each represent different groups).

Nonaqueous electrolyte solution and nonaqueous electrolyte battery

The present invention is to provide: a nonaqueous-electrolyte battery excellent in terms of safety during overcharge and high-temperature storability; and a nonaqueous electrolytic solution which gives the battery. The present invention relates to a nonaqueous electrolytic solution comprising an electrolyte and a nonaqueous solvent, wherein the nonaqueous electrolytic solution comprises at least one of specific compounds.

Growing community of inventors

Inashiki-gun, Japan

Kanako Takiguchi