Mitsubishi Chemical Corporation

Sanyo Electric Co., Ltd.

Mu Ionic Solutions Corporation

Masahiro Takehara

Hiroyuki Tokuda

Shinichi Kinoshita

Minoru Kotato

Takashi Fujii

Makoto Ue

Daisuke Kawakami

Masamichi Onuki

Youichi Ohashi

Ryo Yamaguchi

Masayuki Takeda

Ryoichi Kato

Hidekazu Yamamoto

Keiji Saisho

Shin Fujitani

Maruo Kamino

Hitoshi Suzuki

Noriyuki Tamura

Toshikazu Yoshida

Atsushi Watarai

Daisuke Noda

Takako Takahashi

Masayuku Takeda

The present invention relates to a method for producing lithium fluorosulfonate which comprises reacting a lithium salt and fluorosulfonic acid in a nonaqueous solvent, wherein the lithium salt is a lithium salt not generating water through the reaction step.

Method for producing lithium fluorosulfonate, lithium fluorosulfonate, nonaqueous electrolytic solution, and nonaqueous electrolytic solution secondary battery

A nonaqueous electrolytic solution including an electrolyte, a nonaqueous solvent, and a compound represented by Formula (1) below. (in Formula (1), Xand Xeach independently represent C, S, or P; nand neach independently represent 1 when Xand Xrepresent C or P and 2 when Xand Xrepresent S; nrepresents 1 or 2; nrepresents 1 or 2; Yand Yeach independently represent a hydrocarbon group that may have a substituent or an —OW group (where W represents a hydrocarbon group that may have a substituent); mrepresents 1 or 2, and mrepresents 1 or 2; and Z represents a hydrocarbon group that may have a substituent, an —SiVgroup (where V represents a hydrocarbon group that may have a substituent), an organic onium, or a metal).

Nonaqueous electrolytic solution and electrical storage device including the same

A nonaqueous electrolytic solution that includes lithium fluorosulfonate and a sulfate ion in an amount of from 1.0&#xd7;10mol/L to 1.0&#xd7;10mol/L.

An object is to provide a nonaqueous electrolyte and a nonaqueous-electrolyte secondary battery which have excellent discharge load characteristics and are excellent in high-temperature storability, cycle characteristics, high capacity, continuous-charge characteristics, storability, gas evolution inhibition during continuous charge, high-current-density charge/discharge characteristics, discharge load characteristics, etc. The object has been accomplished with a nonaqueous electrolyte which comprises: a monofluorophosphate and/or a difluorophosphate; and further a compound having a specific chemical structure or specific properties.

Nonaqueous electrolyte for secondary battery and nonaqueous-electrolyte secondary battery employing the same

A nonaqueous electrolyte containing a monofluorophosphate and/or a difluorophosphate and a compound having a specific chemical structure or specific properties. The nonaqueous electrolyte can contain at least one of a saturated chain hydrocarbon, a saturated cyclic hydrocarbon, an aromatic compound having a halogen atom and an ether having a fluorine atom.

Nonaqueous electrolytes and nonaqueous-electrolyte secondary batteries employing the same

A subject is to provide a nonaqueous electrolyte excellent in cycle performances such as capacity retention after cycling, output after cycling, discharge capacity after cycling, and cycle discharge capacity ratio, output characteristics, high-temperature storability, low-temperature discharge characteristics, heavy-current discharge characteristics, high-temperature storability, safety, high capacity, high output, high-current-density cycle performances, compatibility of these performances, etc. Another subject is to provide a nonaqueous-electrolyte secondary battery employing the nonaqueous electrolyte. The subjects have been accomplished with a nonaqueous electrolyte which contains a monofluorophosphate and/or a difluorophosphate and further contains a compound having a specific chemical structure or specific properties.

The objective of the present invention is to prevent deterioration and expanding of anode active material and to improve charge-discharge cycle characteristics in a non-aqueous electrolyte secondary battery comprising an anode of which current collector has thereon a thin layer of an anode active material containing a metal. To solve this problem, in a non-aqueous electrolyte secondary battery wherein a thin layer of anode active material containing a metal which absorbs and discharges lithium is formed on a current collector and the thin layer of the anode active material is divided into columns by a gap formed along the thickness thereof, a compound represented by the following formula is contained in the non-aqueous electrolyte.A-N&#x2550;C&#x2550;O In the above formula, A represents an element or a group other than hydrogen.

Non-aqueous electrolyte secondary battery and non-aqueous electrolyte

A nonaqueous electrolyte secondary battery in which the decomposition of an electrolyte solution is reduced exhibits high coulombic efficiency and excellent charge and discharge cycle performance, and has high energy density. This nonaqueous electrolyte secondary battery includes a negative electrode that is formed by depositing a thin film of active material on a collector by a CVD method, sputtering, evaporation, thermal spraying, or plating, wherein the thin film of the active material can lithiate and delithiate and is divided into columns by cracks formed in the thickness direction, and the bottom of each column is adhered to the collector; a positive electrode that can lithiate and delithiate; and a nonaqueous electrolyte solution containing a lithium salt in a nonaqueous solvent. The electrolyte solution contains a compound expressed by a general formula (I).R-M=0&#x2003;&#x2003;(I)(wherein, Rs are alkyl groups optionally having a substituent, may be identical or different from one another, may be independent substituents, or may be bound together to form a ring; M is S or P; and n is 2 when M is S and is 3 when M is P).

Nonaqueous electrolyte solution for secondary battery and nonaqueous electrolyte secondary battery

The objective of the present invention is to prevent deterioration and expanding of anode active material and to improve charge-discharge cycle characteristics in a non-aqueous electrolyte secondary battery comprising an anode of which current collector has thereon a thin layer of an anode active material containing a metal. To solve this problem, in a non-aqueous electrolyte secondary battery wherein a thin layer of anode active material containing a metal which absorbs and discharges lithium is formed on a current collector and the thin layer of the anode active material is divided into columns by a gap formed along the thickness thereof, a compound represented by the following formula is contained in the non-aqueous electrolyte.A-N&#x2550;C&#x2550;OIn the above formula, A represents an element or a group other than hydrogen.

An electrolyte for an electrolytic capacitor which is high in electrolytic conductivity, excellent in heat stability and high in withstand voltage. An electrolyte for an electrolytic capacitor comprising a tetrafluoroaluminate ion; and an electrolyte for an electrolytic capacitor containing a salt and a solvent, characterized in that electrolytic conductivity X (mS&#xb7;cm) at 25&#xb0; C. and withstand voltage Y (V) of a capacitor satisfy the relationships of formulae (I): Y&#x2267;&#x2212;7.5X+150, and X&#x2267;4, Y&#x3e;0.

Electrolyte for electrolytic capacitor and electrolytic capacitor using the same

An electrolyte for an electrolytic capacitor which is high in electrolytic conductivity, excellent in heat stability and high in withstand voltage. An electrolyte for an electrolytic capacitor including a tetrafluoroaluminate ion; and an electrolyte for an electrolytic capacitor containing a salt and a solvent, characterized in that electrolytic conductivity X (mS&#xb7;cm) at 25&#xb0; C. and withstand voltage Y (V) of a capacitor satisfy the relationships of formulae (I):Y&#x2267;&#x2212;7.5X+150, and X&#x2266;4, Y&#x3e;0.

A nonaqueous electrolyte solution for secondary batteries which is an electrolyte solution for secondary batteries obtained by dissolving a lithium salt in a nonaqueous solvent, wherein the nonaqueous solvent is a solvent mainly comprising a lactone compound and the content of hydroxy carboxylic acids in the electrolyte solution is 1 mmol/kg or lower and a secondary battery employing the same are excellent in high-temperature storage characteristics, cycle characteristics, and capacity retention characteristics and in various cell characteristics in a wide temperature range and safety such as firing properties.

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Ibaraki, Japan

Masahiro Takehara