Central Glass Company, Limited

Bridgestone Corporation

Shoichi Tsujioka

Mikihiro Takahashi

Hironari Takase

Aiichiro Fujiwara

Hiromi Sugimoto

Takayoshi Morinaka

Masutaka Shinmen

Masashi Otsuki

Wataru Kawabata

Makoto Kubo

Hiroki Matsuzaki

Kenta Yamamoto

Makoto Koide

Toshinori Mitsui

Hirokazu Satou

Yasushi Kita

Yoshimi Isono

Naoki Okada

Keiji Sato

Yuki Kondo

Masataka Fujimoto

Hitoshi Oomuro

Tetsu Taroura

An object of the present invention is to provide an electrolytic solution for nonaqueous electrolytic solution batteries capable of showing high output characteristics at low temperature even after the batteries are used to some extent, and a nonaqueous electrolytic solution batteries. The present invention is characterized in the use of an electrolytic solution for nonaqueous electrolytic solution batteries, the electrolytic solution including a difluoro ionic complex (1-Cis) in a cis configuration represented by the general formula (1-Cis), a nonaqueous organic solvent, and a solute. Furthermore, the electrolytic solution may contain a difluoro ionic complex (1-Trans) in a trans configuration or a tetrafluoro ionic complex (5). wherein in (1-Cis), is 

Electrolytic solution for nonaqueous electrolytic solution secondary batteries and nonaqueous electrolytic solution secondary battery

To provide a material suitable for a nonaqueous electrolyte battery having high-temperature durability. An ionic complex of the present invention is represented by any of the following formulae (1) to (3). For example, in the formula (1), A is a metal ion, a proton, or an onium ion; M is any of groups 13 to 15 elements. Rrepresents a Cto Chydrocarbon group which may have a ring, a heteroatom, or a halogen atom, or &#x2014;N(R)&#x2014;. Rat this time represents hydrogen atom, alkali metal atom, a Cto Chydrocarbon group which may have a ring, a heteroatom, or a halogen atom. Rcan also have a branched chain or a ring structure when the number of carbon atoms is 3 or more. Y is carbon atom or sulfur atom. a, o, n, p, q, and r are each predetermined integers. 

Ionic complex, electrolyte for nonaqueous electrolyte battery, nonaqueous electrolyte battery and ionic complex synthesis method

An electrolyte for a non-aqueous electrolyte battery includes a non-aqueous organic solvent and at least lithium hexafluorophosphate as a solute, characterized by further including 10 to 1000 mass ppm of a phosphorus-containing acidic compound and 0.01 to 10.0 mass % of a difluorophosphate. The phosphorus-containing acidic compound is preferably at least one selected from the group consisting of HPF, HPOF, HPOF and HPO. By the use of such an electrolyte, it is possible to provide the non-aqueous electrolyte lithium battery capable of maintaining high discharge capacity even after repeated charge/discharge cycles under a high temperature environment.

Electrolyte for non-aqueous electrolyte battery and non-aqueous electrolyte lithium battery

The present invention relates to a non-aqueous electrolyte additive that allows for improved safety and battery characteristics of a non-aqueous electrolyte secondary battery, and in greater detail, the present invention relates to a non-aqueous electrolyte additive that includes a phosphazene compound represented by the following general formula (1):(NPR)&#x2003;&#x2003;(1)

Non-aqueous electrolyte additive, non-aqueous electrolyte, and non-aqueous electrolyte secondary battery

Disclosed is a production method of a lithium tetrafluoroborate solution for use as a lithium battery electrolytic solution, including: a reaction step of forming lithium tetrafluoroborate by reaction of lithium fluoride and boron trifluoride in a chain carbonate ester solvent and thereby obtaining a reaction solution of the lithium tetrafluoroborate dissolved in the chain carbonate ester solvent; a water removal step of adding a water removing agent to the reaction solution; an acidic impurity removal step of removing an acidic impurity component from the reaction solution by concentrating the reaction solution after the water removal step; and a dilution step of diluting the concentrated solution after the acidic impurity removal step. It is possible by this method to obtain the lithium tetrafluoroborate solution whose acidic impurity content and water content are reduced to be 50 mass ppm or lower and 15 mass ppm or lower, respectively.

Method for producing lithium tetrafluoroborate solution

The present invention relates to a non-aqueous electrolyte additive that allows for improved safety and battery characteristics of a non-aqueous electrolyte secondary battery, and in greater detail, the present invention relates to a non-aqueous electrolyte additive that includes at least one compound selected from a first compound group consisting of phosphazene compounds represented by the following general formula (1):(NPR)&#x2003;&#x2003;(1) 

An electrolyte for an electrochemical device according to the present invention has a chemical structure formula represented by a general formula (1): where M is a group 13 or 15 element of the periodic table; Ais an alkali metal ion or an onium ion; m is a number of 1-4 when M is a group 13 element, and is a number of 1-6 when M is a group 15 element; n is a number of 0-3 when M is a group 13 element, and is a number of 0-5 when M is a group 15 element; R is a halogen atom, a C-Chalogenated alkyl group, a C-Caryl group, or a C-Chalogenated aryl group; a hydrogen atom in R may be replaced with a specific substituent; and a carbon atom in R may be replaced by a nitrogen atom, a sulfur atom or an oxygen atom.

Electrolyte for electrochemical device, electrolyte solution using same, and non-aqueous electrolyte battery

An electrolyte for a non-aqueous electrolyte battery according to the present invention contains a non-aqueous organic solvent; a solute; and both of difluorobis(oxalato)phosphate and tetrafluoro(oxalate)phosphate as additives. A non-aqueous electrolyte battery according to the present invention uses the above electrolyte. By the composite effect of the difluorobis(oxalato)phosphate and tetrafluoro(oxalate)phosphate in the non-aqueous electrolyte and the non-aqueous electrolyte battery, it is possible to improve not only the cycle characteristics and high-temperature storage stability of the battery but also the low-temperature characteristics of the battery at temperatures of 0&#xb0; C. or lower.

Electrolyte for non-aqueous electrolyte batteries and non-aqueous electrolyte battery using the same

An object of the present invention is to provide: a production method for commercially advantageously producing lithium difluorophosphate or an electrolyte solution containing the lithium difluorophosphate, the lithium difluorophosphate serving as an additive useful for improving performance of a nonaqueous electrolyte battery; and a nonaqueous electrolyte battery employing the electrolyte solution for the nonaqueous electrolyte battery which solution contains the lithium difluorophosphate produced by the production method. To provide an electrolyte solution for a nonaqueous electrolyte battery which solution contains lithium difluorophosphate, in such a manner as to produce lithium difluorophosphate in the electrolyte solution by reacting a halide other than a fluoride, LiPFand water in a nonaqueous solvent, the lithium difluorophosphate serving as an additive useful for improving performance of the nonaqueous electrolyte battery.

Method for producing lithium difluorophosphate and nonaqueous electrolyte battery using the same

The invention relates to a process for synthesizing an ionic metal complex represented by the general formula (1) or (5). This process includes reacting in an organic solvent a compound (corresponding to ligand of the complex) represented by the general formula (2) or (6) with a halogen-containing compound represented by the general formula (3) or (4), in the presence of a reaction aid containing an element selected from the group consisting of elements of groups 1-4 and 11-14 of the periodic table. It is possible by this process to easily and efficiently synthesize the ionic metal complex, which can be used as a supporting electrolyte for electrochemical devices, a polymerization catalyst of polyolefins and so forth, or a catalyst for organic synthesis.

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Iruma-gun, Japan

Shoichi Tsujioka