Abstract: A secondary battery includes a positive electrode, a negative electrode, and an electrolyte layer. The electrolyte layer includes an electrolytic solution, a polymer compound, and a plurality of inorganic particles. The polymer compound includes a copolymer including vinylidene fluoride and hexafluoropropylene, and a ratio W2/W1 of a weight W2 of the electrolytic solution to a weight W1 of the polymer compound is from 2.5 to 50.

Abstract: A battery capable of improving high-temperature characteristics is provided. The battery includes a cathode, an anode and an electrolytic solution. A separator provided between the cathode and the anode is impregnated with the electrolytic solution. A solvent of the electrolytic solution includes a main solvent such as a cyclic carbonate which includes halogen and a sub solvent such as carbonate dimer.

Abstract: A battery is provided. The battery includes an electrode group including a positive electrode and a negative electrode, and an electrolyte including an electrolytic solution. The electrode group includes an insulating layer having an insulating material, and the electrolytic solution includes a nonaqueous solvent containing propylene carbonate in an amount of 5% by mass or more and an additive including one or more predetermined compounds.

Abstract: A battery, including: a positive electrode; a negative electrode; and an electrolyte layer containing a negative electrode active material.

Abstract: A secondary battery capable of improving high-temperature characteristics is provided. The secondary battery includes a cathode, an anode and an electrolytic solution. A separator provided between the cathode and the anode is impregnated with the electrolytic solution. A solvent of the electrolytic solution includes a main solvent such as a cyclic carbonate which includes halogen and a sub solvent such as carbonate dimer.

Abstract: An electrolytic solution for a secondary battery is provided. The electrolyte solution includes an electrolyte salt; and a solvent including a first solvent and a second solvent; wherein the first solvent includes 4-fluoro-1,3-dioxolane-2-one; and wherein the second solvent includes at least one of Chemical Formula No. 23, Chemical Formula No. 24, or Chemical Formula No. 25.

Abstract: A secondary battery includes a cathode, an anode, and non-aqueous electrolytic solution. The non-aqueous electrolytic solution includes a boron compound. The boron compound includes six or more boron (B) atoms, and includes an octavalent boron-hydrogen-containing structure represented by Formula (1), a dodecavalent boron-carbon-containing structure represented by Formula (2), or both.

Abstract: A secondary battery includes: a cathode; an anode; and non-aqueous electrolytic solution including a cyclic ether compound that includes a skeleton and one or more substituent groups introduced into the skeleton. The skeleton includes one or more four-or-more-membered oxygen-containing rings. The one or more substituent groups each are a monovalent group represented by Formula (1). —X—O—R??(1) (X is one of a divalent chain saturated hydrocarbon group, a halide group thereof, and nothing. R is one of a monovalent chain saturated hydrocarbon group, etc. At least one of one or more Rs includes one or more of the monovalent chain unsaturated hydrocarbon group, the monovalent cyclic unsaturated hydrocarbon group, the monovalent oxygen-containing cyclic unsaturated hydrocarbon group, the halide group thereof, and the monovalent group obtained by bonding two or more thereof, and includes a carbon-carbon multiple bond (one of —C?C— and —C?C—) bonded to an ether bond (—O—).

Abstract: A secondary battery includes: a cathode; an anode; and non-aqueous electrolytic solution including a cyclic ether compound that includes a skeleton and one or more substituent groups introduced into the skeleton. The skeleton includes one or more four-or-more-membered oxygen-containing rings. The one or more substituent groups each are a monovalent group represented by Formula (1). —X—O—R??(1) (X is one of a divalent chain saturated hydrocarbon group, a halide group thereof, and nothing. R is one of a monovalent chain saturated hydrocarbon group, etc. At least one of one or more Rs includes one or more of the monovalent chain unsaturated hydrocarbon group, the monovalent cyclic unsaturated hydrocarbon group, the monovalent oxygen-containing cyclic unsaturated hydrocarbon group, the halide group thereof, and the monovalent group obtained by bonding two or more thereof, and includes a carbon-carbon multiple bond (one of —C?C— and —C?C—) bonded to an ether bond (—O—).

Abstract: An electrolytic solution is an electrolytic solution for an electrochemical device including a negative electrode including a magnesium-based material, and has a moisture content of more than 10 ppm and less than 500 ppm. The electrochemical device including a negative electrode including a magnesium-based material includes an electrolytic solution having a moisture content of more than 10 ppm and less than 500 ppm.

Abstract: A battery is provided including an anode, a cathode and an electrolyte; wherein the electrolyte includes one or both of fluoro ethylene carbonate and difluoro ethylene carbonate in an amount of 0.5% by mass or more and 10% by mass or less, wherein the anode includes an anode active material layer provided on an anode current collector, and wherein a thickness of the anode active material layer, after charging the battery, is 58 um or more and 75 um or less.

Abstract: A secondary battery includes: a cathode, an anode, and a nonaqueous electrolytic solution in a package member having a flat surface, in which the nonaqueous electrolytic solution includes a methylene cyclic carbonate represented by an expression (1): where R1 and R2 each are a hydrogen group, a halogen group, a monovalent hydrocarbon group, a monovalent halogenated hydrocarbon group, an oxygen-containing monovalent hydrocarbon group, or an oxygen-containing monovalent halogenated hydrocarbon group, and R1 and R2 may be bonded to each other.

Abstract: A secondary battery includes: a cathode; an anode; and an electrolyte layer containing a nonaqueous electrolytic solution and a polymer compound, wherein the polymer compound contains a block copolymer, and the block copolymer contains vinylidene fluoride, hexafluoro propylene, and one or more of monomethyl maleate, trifluoroethylene, and chlorotrifluoroethylene as polymerization units.

Abstract: Secondary batteries capable of improving cycle characteristics are provided. The secondary battery includes a cathode, an anode, and an electrolytic solution. A separator provided between the cathode and the anode is impregnated with the electrolytic solution. The electrolytic solution contains a solvent and an electrolyte salt. The solvent contains a cyclic compound having a disulfonic acid anhydride group (—S(?O)2-O—S(?O)2-) and at least one of a nitrile compound. Compared to a case that the solvent does not contain both the cyclic compound having the disulfonic acid anhydride group and succinonitrile or a case that that the solvent contains at least one thereof, chemical stability of the electrolytic solution is improved. Thus, even if charge and discharge are repeated, electrolytic solution decomposition is inhibited.

Abstract: A secondary battery capable of improving cycle characteristics, conservation characteristics, and load characteristics is provided. The secondary battery includes a cathode, an anode, and an electrolytic solution. A separator provided between the cathode and the anode is impregnated with an electrolytic solution. The electrolytic solution includes one or more of a dicarbonic ester compound, a dicarboxylic compound, a disulfonic compound, a monofluoro lithium phosphate, and difluoro lithium phosphate and one or more of fluorinated lithium phosphate, fluorinated lithium borate, and imide lithium.

Abstract: A battery includes a positive electrode, a negative electrode, and an electrolyte solution, in which the electrolyte solution contains a predetermined compound.

Abstract: A secondary battery includes: a cathode; an anode; and non-aqueous electrolytic solution including a cyclic ether compound that includes a skeleton and one or more substituent groups introduced into the skeleton. The skeleton includes one or more four-or-more-membered oxygen-containing rings. The one or more substituent groups each are a monovalent group represented by Formula (1). —X—O—R??(1) (X is one of a divalent chain saturated hydrocarbon group, a halide group thereof, and nothing. R is one of a monovalent chain saturated hydrocarbon group, etc. At least one of one or more Rs includes one or more of the monovalent chain unsaturated hydrocarbon group, the monovalent cyclic unsaturated hydrocarbon group, the monovalent oxygen-containing cyclic unsaturated hydrocarbon group, the halide group thereof, and the monovalent group obtained by bonding two or more thereof, and includes a carbon-carbon multiple bond (one of —C?C— and —C?C—) bonded to an ether bond (—O—).

Abstract: [Solving Means] A battery includes a positive electrode, a negative electrode, and an electrolyte. The electrolyte includes an electrolyte solution containing a solvent, an electrolyte salt, and a compound having a predetermined structure.

Abstract: [Solving Means] A battery includes: a positive electrode; a negative electrode; and an electrolyte. The electrolyte contains an electrolyte solution, and a polymer compound holding the electrolyte solution. The polymer compound includes a copolymer having at least predetermined two kinds of repeating units.

Abstract: A nonaqueous electrolyte battery includes: a positive electrode, a negative electrode, and a nonaqueous electrolyte, wherein the positive electrode contains, as a positive electrode active material, a positive electrode material having a surface composition represented by the following formula (I); the nonaqueous electrolyte contains a halogenated carbonate represented by any of the following formulae (1) to (2) and an alkylbenzene represented by the following formula (3); a content of the halogenated carbonate is 0.1% by mass or more and not more than 50% by mass relative to the nonaqueous electrolyte; and a content of the alkylbenzene is 0.