Abstract: Disclosed is a non-aqueous electrolytic solution for an energy storage device, including a non-aqueous solvent, an electrolyte salt, a first additive consisting of a sulfolane compound represented by the following formula (1), and a second additive which is at least one selected from the group consisting of a cyclic sulfuric ester compound represented by the following formula (2a) and a dinitrile compound represented by the following formula (2b):

Abstract: The present invention provides a non-aqueous electrolytic solution for a lithium secondary battery or a lithium ion capacitor, wherein the non-aqueous electrolytic solution includes a lithium salt as dissolved in a non-aqueous solvent in a concentration of 0.8 to 1.5 M (mol/L), the non-aqueous solvent includes, in relation to the whole of the non-aqueous solvent, 5 to 25% by volume of ethylene carbonate, 5 to 25% by volume of propylene carbonate, 20 to 30% by volume of dimethyl carbonate, 20 to 40% by volume of methyl ethyl carbonate, and 10 to 20% by volume of a fluorinated chain ester; the total content of ethylene carbonate and propylene carbonate in the non-aqueous solvent is 20 to 30% by volume, the total content of dimethyl carbonate and the fluorinated chain ester in the non-aqueous solvent is 30 to 40% by volume; and the flash point of the non-aqueous electrolytic solution is 20° C. or higher, and the present invention also provides an energy storage device.

Abstract: Disclosed are methods for dehydrating a water containing source of formaldehyde in which water is separated from the water containing source of formaldehyde using a zeolite membrane. In certain aspects, the water containing source of formaldehyde includes a separation enhancer having a relative static permittivity ranging from 2.5 to 20, and the water containing source of formaldehyde may further include methanol. In certain aspects, (meth)acrylic acid alkyl ester may be produced using the dehydrated source of formaldehyde.

Abstract: The present invention provides a nonaqueous electrolytic solution capable of suppressing worsening of heat stability of a negative electrode and improving safety of an energy storage device while maintaining high-load charging and discharging cycle properties at a high temperature, an energy storage device using the same, and a phosphonoformic acid compound to be used for the same. The nonaqueous electrolytic solution having an electrolyte salt dissolved in a nonaqueous solvent contains 0.001 to 5% by mass of at least one selected from a phosphonoformic acid compound having at least one carbon-carbon unsaturated bond, which is represented by the following general formula (I), and a phosphonoformic acid compound having a carbon-carbon unsaturated bond or two phosphonocarbonyl groups, which is represented by the following general formula (II).

Abstract: Disclosed are methods for dehydrating a water containing source of formaldehyde in which water is separated from the water containing source of formaldehyde using a zeolite membrane. In certain aspects, the water containing source of formaldehyde includes a separation enhancer having a relative static permittivity ranging from 2.5 to 20, and the water containing source of formaldehyde may further include methanol. In certain aspects, (meth)acrylic acid alkyl ester may be produced using the dehydrated source of formaldehyde.

Abstract: The present invention relates to a nonaqueous electrolytic solution capable of improving charging storage properties and discharging storage properties in the high-temperature environment and provides a nonaqueous electrolytic solution for an energy storage device, which is a nonaqueous electrolytic solution having an electrolyte salt dissolved in a nonaqueous solvent, the nonaqueous electrolytic solution containing 0.1 to 4% by mass of 1,3-dioxane and further containing 0.1 to 4% by mass of a compound having a carbon-carbon triple bond represented by the following general formula (I); and an energy storage device using the same. In the formula, R1 represents a hydrogen atom or a methyl group, and R2 represents a methyl group, an ethyl group, a methoxy group, or an ethoxy group.

Abstract: Disclosed are methods for dehydrating a water containing source of formaldehyde in which water is separated from the water containing source of formaldehyde using a zeolite membrane. In certain aspects, the water containing source of formaldehyde includes a separation enhancer having a relative static permittivity ranging from 2.5 to 20, and the water containing source of formaldehyde may further include methanol. In certain aspects, (meth)acrylic acid alkyl ester may be produced using the dehydrated source of formaldehyde.

Abstract: The present invention provides a non-aqueous electrolytic solution for a lithium secondary battery or a lithium ion capacitor, wherein the non-aqueous electrolytic solution includes a lithium salt as dissolved in a non-aqueous solvent in a concentration of 0.8 to 1.5 M (mol/L), the non-aqueous solvent includes, in relation to the whole of the non-aqueous solvent, 5 to 25% by volume of ethylene carbonate, 5 to 25% by volume of propylene carbonate, 20 to 30% by volume of dimethyl carbonate, 20 to 40% by volume of methyl ethyl carbonate, and 10 to 20% by volume of a fluorinated chain ester; the total content of ethylene carbonate and propylene carbonate in the non-aqueous solvent is 20 to 30% by volume, the total content of dimethyl carbonate and the fluorinated chain ester in the non-aqueous solvent is 30 to 40% by volume; and the flash point of the non-aqueous electrolytic solution is 20° C. or higher, and the present invention also provides an energy storage device.

Abstract: There are provided: a nonaqueous electrolytic solution for an energy storage device provided with a positive electrode, a negative electrode, a separator and a nonaqueous electrolytic solution having an electrolyte salt dissolved in a nonaqueous solvent, wherein the potential of the positive electrode in a full-charge state is 4.5 V or higher on Li basis and the nonaqueous electrolytic solution contains at least one kind of tertiary carboxylic acid esters represented by the following general formula (I); and an energy storage device using the nonaqueous electrolytic solution. wherein R1 to R3 each independently represent a methyl group or an ethyl group; and R4 represents a halogenated alkyl group having 1 to 5 carbon atoms.

Abstract: The present invention is to provide a nonaqueous electrolytic solution prepared by dissolving an electrolyte salt in a nonaqueous solvent and an energy storage device, wherein the nonaqueous electrolytic solution includes LiPF2(—OC(?O)—C(?O)O—)2 and at least one kind of a compound having a carbon-carbon triple bond represented by the following general formula (I): (wherein R1 and R2 each independently represent a hydrogen atom or an alkyl group having from 1 to 6 carbon atoms and optionally substituted with a halogen atom; and R3 represents a methyl group or an ethyl group. X represents a hydrogen atom or —CR1R2—OS(?O)2—R3.).

Abstract: Provided are a nonaqueous electrolytic solution having an electrolyte salt dissolved in a nonaqueous solvent, the nonaqueous electrolytic solution containing 0.01 to 4% by mass of a compound represented by the following general formula (I), and an energy storage device including the nonaqueous electrolytic solution: wherein R1 and R2 each independently represent a methyl group, an ethyl group, or a fluoroethyl group. The nonaqueous electrolytic solution and the energy storage device have improved high-temperature storage property and low-temperature cycle property.

Abstract: A nonaqueous electrolytic solution where an electrolyte salt is dissolved to a nonaqueous solvent, wherein the electrolyte salt includes at least one kind of first lithium salt selected from a group consisting of LiPF6, LiBF4, LiN(SO2F)2, LiN(SO2CF3)2, and LiN(SO2C2F5)2, at least two kinds of second lithium salts selected from a group consisting of a lithium salt having an oxalic acid structure, a lithium salt having a phosphoric acid structure, and a lithium salt including a S?O group, and at least one kind of tertiary carboxylic acid ester represented by the following general formula (I) is contained, and an energy storage device containing the same. (In the formula, each of R1 to R3 independently represents a methyl group or ethyl group, and R4 represents a C1 to C6 alkyl group in which at least one hydrogen atom is substituted or not substituted by a halogen atom.

Abstract: The present invention provides an excellent nonaqueous electrolytic solution capable of improving low-temperature and high-temperature cycle properties and load characteristics after high-temperature charging storage, an electrochemical element using it, and an alkynyl compound used for it. The nonaqueous electrolytic solution of the present invention comprises containing at least one alkynyl compound represented by the following general formula (I) in an amount of from 0.01 to 10% by mass in the nonaqueous electrolytic solution. R1(O)n—X1—R2??(I) (In the formula, X1 represents a group —C(?O)—, a group —C(?O)—C(?O)—, a group —S(?O)2—, a group —P(?O) (—R3)—, or a group —X3—S(?O)2O—.

Abstract: A nonaqueous electrolytic solution that is capable of improving the electrochemical characteristics in a broad temperature range, and an energy storage device using the same are provided, and the nonaqueous electrolytic solution contains a nonaqueous solvent having dissolved therein an electrolyte salt, in which the nonaqueous solvent contains two or more kinds of cyclic carbonates selected from ethylene carbonate, propylene carbonate, 1,2-butylene carbonate, 2,3-butylene carbonate, 4-fluoro-1,3-dioxolan-2-one, trans- or cis-4,5-difluoro-1,3-dioxolan-2-one, vinylene carbonate, vinyl ethylene carbonate and 4-ethynyl-1,3-dioxolan-2-one, and the nonaqueous electrolytic solution further contains a cyclic acid anhydride represented by the following general formula (I) having bonded thereto a side chain that has 3 or more carbon atoms and has a double bond or a triple bond at an end thereof in an amount of from 0.

Abstract: A nonaqueous electrolytic solution prepared by dissolving an electrolyte salt in a nonaqueous solvent, wherein the nonaqueous electrolytic solution contains at least one kind of an isocyanate compound having an ester structure represented by the following general formula (I): (wherein R represents an alkyl group, an alkenyl group, a C6 to C12 aryl group, an alkyloxy group, an alkenyloxy group, an isocyanatoalkyloxy group, or an aryloxy group in which at least one of the hydrogen atom may be substituted with a halogen atom. X represents a linear or branched alkylene group in which at least one of the hydrogen atom may be substituted with a halogen atom, or a bivalent linking group comprising at least one ether bond).

Abstract: The present invention provides a regenerative electrolytic solution for an energy storage device to be refilled when discharge capacity of the energy storage device becomes lower than initial discharge capacity by 1% or more, and the regenerative electrolytic solution has a higher electrolyte concentration and a lower viscosity than an original electrolytic solution. According to the present invention, battery performance can be appropriately improved after the refill.

Abstract: The present invention provides a nonaqueous electrolytic solution capable of suppressing worsening of heat stability of a negative electrode and improving safety of an energy storage device while maintaining high-load charging and discharging cycle properties at a high temperature, an energy storage device using the same, and a phosphonoformic acid compound to be used for the same. The nonaqueous electrolytic solution having an electrolyte salt dissolved in a nonaqueous solvent contains 0.001 to 5% by mass of at least one selected from a phosphonoformic acid compound having at least one carbon-carbon unsaturated bond, which is represented by the following general formula (I), and a phosphonoformic acid compound having a carbon-carbon unsaturated bond or two phosphonocarbonyl groups, which is represented by the following general formula (II).

Abstract: Provided are a separator for an energy storage device having an intermediate coating layer between a porous film (I) and a porous film (II), in which the porous film (I) having the intermediate coating layer on one side and the porous film (II) are mechanically stacked and laminated with each other via the intermediate coating layer, and an energy storage device. According to the present invention, it is possible to provide a separator capable of improving discharge characteristics at low temperatures and cycle characteristics at high temperatures and an energy storage device using the same.

Abstract: There is provided a nonaqueous electrolytic solution for an energy storage device provided with a positive electrode, a negative electrode and a nonaqueous electrolytic solution which is obtained by dissolving an electrolytic salt into a nonaqueous solvent, wherein the negative electrode contains, as a negative electrode active material, lithium titanate that has a ratio DBET/DX (?m/?m) of 3 or less, the ratio DBET/DX (?m/?m) being a ratio of a specific surface area equivalent diameter n calculated from a specific surface area measured by a BET method to a crystallite diameter DX calculated using a Scherrer equation from an X-ray diffractometry result, and the nonaqueous electrolytic solution contains 0.01 to 3% by mass of an organic or inorganic compound having an oxalate structure.

Abstract: The present invention provides a nonaqueous electrolytic solution capable of improving electrochemical characteristics at high temperatures and further capable of not only improving a capacity retention rate after a high-temperature cycle test but also decreasing a rate of increase of an electrode thickness, and also to provide an energy storage device using the same. A nonaqueous electrolytic solution having an electrolyte salt dissolved in a nonaqueous solvent, the nonaqueous electrolytic solution containing from 0.001 to 5% by mass of a diisocyanate compound represented by OCN-L-NCO (in the formula, L represents an alkylene group having from 4 to 12 carbon atoms) and further containing from 0.001 to 5% by mass of at least one selected from a specified phosphoric acid ester compound, a specified cyclic sulfonic acid ester compound, a specified isocyanate compound having an ester structure, and a specified triple bond-containing compound, and an energy storage device using the same, are disclosed.