Abstract: A secondary battery, includes: a cathode; an anode; and an electrolytic solution including a sulfuric acid compound represented by Xn+[M(Rf)a(CN)b(SO4)c]m?, where Xn+ is one of ions such as a metal ion, M is one of elements such as transition metal elements, Rf is one of groups such as a fluorine group (—F), a is an integer of 0 to 4, b is an integer of 0 to 5, c is an integer of 1 to 4, m is an integer of 1 to 3, and n is an integer of 1 or 2, where one or more of Rf's are a monovalent fluorinated hydrocarbon group in a case where X=lithium (Li), M=boron (B), a=2, b=0, and c=1 are satisfied.

Abstract: A secondary battery includes: a cathode and an anode that are opposed to each other with a separator in between; and an electrolytic solution. The cathode includes a cathode active material layer on a cathode current collector. The anode includes an anode active material layer on an anode current collector. A heat-resistant layer is provided at least in a region in which the cathode active material layer and the anode active material layer are opposed to each other between the cathode and the anode. The heat-resistant layer includes a material having a higher melting point or higher decomposition temperature than a melting point or decomposition temperature of the separator. The electrolytic solution includes an unsaturated cyclic ester carbonate.

Abstract: An anode and a secondary battery capable of improving the charge and discharge efficiency are provided. The anode includes an anode current collector, and an anode active material layer provided on the anode current collector. The anode active material layer has a plurality of anode active material particles containing at least one of a simple substance of silicon, a compound of silicon, a simple substance of tin and a compound of tin, and has a coat containing an oxo acid salt in at least part of the surface of the anode active material particles.

Abstract: A secondary battery includes: a cathode; an anode; and an electrolytic solution including a cyano compound, the cyano compound including a compound represented by R1-O—C(?O)—O—R2 (R1, R2, or both include a cyano-group-containing group), a compound represented by R3-C(?O)—O—R4 (R4 includes the cyano-group-containing group), or both.

Abstract: A secondary battery having a cathode, an anode, and an electrolyte is provided. The cathode includes a cathode active material containing at least one kind selected from the group consisting of sulfur S and phosphorus P in a portion near the particle surface of a lithium composite oxide. A content of the kind in the portion is larger than that in the particle of the lithium composite oxide.

Abstract: A secondary battery includes: a cathode; an anode; and an electrolytic solution including a cyano compound, the cyano compound including a compound represented by R1-O—C(?O)—O—R2 (R1, R2, or both include a cyano-group-containing group), a compound represented by R3-C(?O)—O—R4 (R4 includes the cyano-group-containing group), or both.

Abstract: A secondary battery is provided. The secondary battery includes a cathode; an anode; and a gel electrolyte, wherein the gel electrolyte includes an electrolytic solution and a polymer, and the electrolytic solution includes an unsaturated cyclic ester carbonate represented by Formula (2): where R5 and R6 are one of a hydrogen group, a halogen group, a monovalent hydrocarbon group, a monovalent halogenated hydrocarbon group, a monovalent oxygen-containing hydrocarbon group, and a monovalent halogenated oxygen-containing hydrocarbon group; and where R5 and R6 may be bonded to each other.

Abstract: A secondary battery is provided. The secondary battery includes a cathode; an anode; and a gel electrolyte, wherein the gel electrolyte includes an electrolytic solution and a polymer, and the electrolytic solution includes an unsaturated cyclic ester carbonate represented by Formula (2): where R5 and R6 are one of a hydrogen group, a halogen group, a monovalent hydrocarbon group, a monovalent halogenated hydrocarbon group, a monovalent oxygen-containing hydrocarbon group, and a monovalent halogenated oxygen-containing hydrocarbon group; and where R5 and R6 may be bonded to each other.

Abstract: A secondary battery includes: a cathode, an anode, and an electrolytic solution including a cyano compound. The cathode, the anode, and the electrolytic solution are provided inside a film-like outer package member.

Abstract: A secondary battery having a cathode, an anode, and an electrolyte is provided. The cathode includes a cathode active material containing at least one kind selected from the group consisting of sulfur S and phosphorus P in a portion near the particle surface of a lithium composite oxide. A content of the kind in the portion is larger than that in the particle of the lithium composite oxide.

Abstract: A secondary battery includes: a cathode; an anode; and an electrolytic solution. The anode includes a carbon material and styrene-butadiene rubber. The electrolytic solution includes an unsaturated cyclic ester carbonate represented by the following Formula (1). (X is a divalent group in which m-number of >C?CR1R2 and n-number of >CR3R4 are bonded in any order. Each of R1 to R4 is one of a hydrogen group, a halogen group, a monovalent hydrocarbon group, a monovalent halogenated hydrocarbon group, a monovalent oxygen-containing hydrocarbon group, and a monovalent halogenated oxygen-containing hydrocarbon group. Any two or more of the R1 to the R4 are allowed to be bonded to one another. m and n satisfy m?1 and n?0.

Abstract: The secondary battery includes an electrolytic solution, a positive electrode and a negative electrode, and the negative electrode includes a plurality of particulate negative electrode active materials, a first negative electrode binder, and a plurality of second negative electrode binders with an average particle size smaller than the plurality of particulate negative electrode active materials. The plurality of particulate negative electrode active materials have an average particle size of 5 ?m or more and 30 ?m or less. The first negative electrode binder includes one or both of a styrene butadiene rubber and a derivative thereof. The plurality of second negative electrode binders include one or both of a polyvinylidene fluoride and a derivative thereof, and the plurality of second negative electrode binders have an average particle size of 0.1 ?m or more and 10 ?m or less.

Abstract: A secondary battery includes a cathode, an anode, and an electrolytic solution including a cyano compound.

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 secondary battery includes a cathode, an anode, and a nonaqueous electrolytic solution. The anode contains a carbon material and silicon oxide, and a weight ratio (%) of the silicon oxide with respect to a total of the carbon material and the silicon oxide is within a range of 0.01% to 20% both inclusive. The nonaqueous electrolytic solution contains an unsaturated cyclic carbonate ester.

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 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: A secondary battery is provided. The secondary battery includes a cathode; an anode; and a non-aqueous electrolytic solution, wherein the cathode includes any one of a first lithium-containing compound and a second lithium-containing compound, the first lithium-containing compound having a bedded salt-type crystal structure, wherein the first lithium-containing compound includes one or more metal elements (M) other than lithium (Li), wherein the second lithium-containing compound having an olivine-type crystal structure, and wherein the nonaqueous electrolytic solution includes an unsaturated cyclic compound.

Abstract: A secondary battery includes: a cathode including a lithium-oxygen-containing compound; an anode; and non-aqueous electrolytic solution including one or more first anions represented by Formula (1). B(XY)xFyRz-??(1) where X is one of a divalent chain hydrocarbon group, a divalent fluorinated chain hydrocarbon group, and nothing; Y is one of a cyano group (—C?N) and an isocyano group (—N+?C—); R is one of a monovalent fluorinated chain hydrocarbon group and a monovalent fluorinated cyclic hydrocarbon group; and x to z are integers that satisfy x>0, y?0, z?0, (x+y+z)=4, and (y+z)>0.

Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode having a positive electrode active material layer provided on a positive electrode collector, a negative electrode having a negative electrode active material layer provided on a negative electrode collector, and a nonaqueous electrolyte. The nonaqueous electrolyte contains at least one member selected from the group consisting of sulfone compounds represented by the following formulae (1) and (2); and an inorganic phosphorus compound represented by the following formula (3) exists on the surface of a positive electrode active material: R1 represents CmH2m-n1Xn2; X represents a halogen; m represents an integer of from 2 to 7; each of n1 and n2 independently represents an integer of from 0 to 2m; R2 represents CjH2j-k1Zk2; Z represents a halogen; j represents an integer of from 2 to 7; each of k1 and k2 independently represents an integer of from 0 to 2j; each of R3, R4 and R5 independently represents H or OH; and a is 0 or 1.