Abstract: A secondary battery is provided. The secondary battery includes a positive electrode, a negative electrode, and an electrolyte layer, and the electrolyte layer includes an electrolytic solution and a copolymer containing vinylidene fluoride, hexafluoropropylene, and a hetero-unsaturated compound.

Abstract: A secondary battery is provided. The secondary battery includes a positive electrode, a negative electrode, and an electrolyte layer, and the electrolyte layer includes an electrolytic solution and a copolymer containing vinylidene fluoride, hexafluoropropylene, and a hetero-unsaturated compound.

Abstract: A secondary battery includes a positive electrode, a negative electrode, and an electrolyte layer. The electrolyte layer includes an electrolytic solution, two or more copolymers each containing hexafluoropropylene as a component and each having a different copolymerization amount (wt %) of hexafluoropropylene, and a plurality of inorganic particles.

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: A secondary battery includes a cathode, an anode, and an electrolyte layer including non-aqueous electrolytic solution and a polymer compound. The polymer compound includes a graft copolymer. The graft copolymer includes a block copolymer as a main chain, and includes one or both of a homopolymer and a copolymer as one or more side chains. The block copolymer includes, as polymerization units, vinylidene fluoride and hexafluoropropylene. The homopolymer includes, as a polymerization unit, one selected from the group consisting of vinylidene fluoride, hexafluoropropylene, monomethyl maleate, trifluoroethylene, chlorotrifluoroethylene, acrylic acid, and methacrylic acid. The copolymer includes, as polymerization units, two or more selected from the group consisting of vinylidene fluoride, hexafluoropropylene, monomethyl maleate, trifluoroethylene, chlorotrifluoroethylene, acrylic acid, and methacrylic acid.

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: A secondary battery includes a cathode, an anode, and an electrolyte layer including non-aqueous electrolytic solution and a polymer compound. The polymer compound includes a graft copolymer. The graft copolymer includes a block copolymer as a main chain, and includes one or both of a homopolymer and a copolymer as one or more side chains. The block copolymer includes, as polymerization units, vinylidene fluoride and hexafluoropropylene. The homopolymer includes, as a polymerization unit, one selected from the group consisting of vinylidene fluoride, hexafluoropropylene, monomethyl maleate, trifluoroethylene, chlorotrifluoroethylene, acrylic acid, and methacrylic acid. The copolymer includes, as polymerization units, two or more selected from the group consisting of vinylidene fluoride, hexafluoropropylene, monomethyl maleate, trifluoroethylene, chlorotrifluoroethylene, acrylic acid, and methacrylic acid.

Abstract: A secondary battery includes: an electrode including an active material layer; and an electrolyte layer provided on the active material layer, wherein area density of the active material layer is equal to or larger than about 40 milligrams per square centimeter, the electrolyte layer includes a polymer compound and an electrolytic solution, and by surface observation of the electrolyte layer, (A) circular regions are not observed, or (B) one or more circular regions are observed, and an average diameter of the circular regions is equal to or less than about 1.3 millimeters.

Abstract: A bisboron compound represented by the general formula (I): wherein B represents a boron atom, Y represents an oxygen or sulfur atom, R1 and R2 independently represent a monocyclic aromatic group, a polycyclic aromatic group, or a heterocyclic group containing at least one heteroatom selected from oxygen, nitrogen and sulfur atoms, R3 represents a hydrogen atom; —(CH2)m—NR4R5; —CO—(CH2)m—NR4R5; —COCH(NH2)R6; —CHR7R8; —CH2CH(NH2)—R9; quinolyl substituted with C1-C4 alkyl group; or C1-C4 alkyl substituted with pyridyl, piperidino or pyrrolidinyl group, and X represents a monocyclic aromatic group, a polycyclic aromatic group or a heterocyclic group, which may be the same as or different from R1 and R2, or a bifunctional group having a monocyclic aromatic group, polycyclic aromatic group or heterocyclic group bonded to each side of a group selected from the group consisting of a single bond, O, CH2, S, SO2, CH2OCH2, OCH2, OCH2CH2OCH2, OCH2OCH2CH2 and CH2OCH2CH2, or a salt thereof, and a composition for contr