Abstract: A solid-state battery including: a battery element including: a positive electrode including a positive electrode active material part, and a negative electrode; a positive external terminal in contact with the positive electrode; and a negative external terminal in contact with the negative electrode, wherein the battery element further includes a first electrode enclosure part surrounding a portion other than a first contact portion between the positive external terminal and the positive electrode, at least the positive electrode contains a first solid electrolyte containing lithium and halogen, the first electrode enclosure part includes at least a first region interposed between the positive electrode and the negative external terminal, the first region contains lithium and a second solid electrolyte containing halogen or not containing halogen, and an element ratio (%) of halogen to the lithium of the second solid electrolyte in the first region is 0% to 6%.

Abstract: A solid-state battery including a solid-state battery laminated body including a positive electrode layer, a negative electrode layer, and a solid electrolyte interposed between the positive electrode layer and the negative electrode layer; a positive electrode terminal on a first side surface of the solid-state battery laminated body; and a negative electrode terminal on a second side surface of the solid-state battery laminated body, the second side surface facing the first side surface. In such a solid-state battery, in at least one electrode layer of the positive electrode layer and the negative electrode layer, a terminal contact end portion containing an electrode active material is in direct contact with the respective positive or negative electrode terminal, and a thickness of a non-terminal contact end portion in the electrode layer is smaller than a thickness of a central portion of the electrode layer.

Abstract: A solid-state battery including: a negative electrode layer including: a negative electrode active material including a Li composite oxide; and an oxide glass-based solid electrolyte, in which a content percentage of the solid electrolyte is 20% by mass to 60% by mass based on a total amount of the negative electrode active material and the solid electrolyte in the negative electrode layer, and a ratio (B/A) of an actual density B of the negative electrode active material to a true density A of the negative electrode active material is 0.3 to 0.6.

Abstract: A solid-state battery that includes: a solid-state battery laminate including at least one battery constituent unit including: a positive electrode layer, the positive electrode layer containing a conductive carbon material; a positive electrode current collecting portion arranged at an end surface of the positive electrode layer; a negative electrode layer; and a solid-state electrolyte layer interposed between the positive electrode layer and the negative electrode layer in a stacking direction thereof; a positive electrode terminal electrically connected to the positive electrode current collecting portion; and a negative electrode terminal electrically connected to the negative electrode layer.

Abstract: A solid state battery including a positive electrode layer, a negative electrode layer, and a solid electrolyte layer interposed between the positive electrode layer and the negative electrode layer, wherein the positive electrode layer includes a positive electrode active material in which a spacing d003 of a lattice plane (003) is 4.800 ? or more in a charged state at a positive electrode potential of 4.55 V.

Abstract: A solid-state battery including a solid-state battery laminated body including a positive electrode layer, a negative electrode layer, and a solid electrolyte interposed between the positive electrode layer and the negative electrode layer; a positive electrode terminal on a first side surface of the solid-state battery laminated body; and a negative electrode terminal on a second side surface of the solid-state battery laminated body, the second side surface facing the first side surface. In such a solid-state battery, in at least one electrode layer of the positive electrode layer and the negative electrode layer, a terminal contact end portion containing an electrode active material is in direct contact with the respective positive or negative electrode terminal, and a thickness of a non-terminal contact end portion in the electrode layer is smaller than a thickness of a central portion of the electrode layer.

Abstract: A nonaqueous electrolytic secondary battery includes: a positive electrode; a negative electrode; and an electrolyte that contains a nonaqueous electrolytic solution, wherein the nonaqueous electrolytic solution contains at least one phosphorus compound selected from the group consisting of phosphine oxide, phosphonic ester, and phosphinic ester, and the phosphine oxide, the phosphonic ester, and the phosphinic ester are phosphorus compounds represented by the following formulae (I), (II), and (III), respectively.

Abstract: A nonaqueous electrolyte battery includes: a positive electrode, a negative electrode, and a nonaqueous electrolyte containing a nonaqueous electrolytic solution, wherein the nonaqueous electrolytic solution contains a compound represented by the following general formula (I) wherein, in the general formula (I), each of R1 to R4 independently represents a group having a hydrocarbon group having at least one aromatic ring and at least one unsaturated bond or a hydrogen atom, provided that at least one of R1 to R4 is a group having a hydrocarbon group having at least one aromatic ring and at least one unsaturated bond; and each of A and B independently represents a carbonyl group, a sulfonyl group, or a methylene group, provided that at least one of A and B is a carbonyl group or a sulfonyl group.

Abstract: A nonaqueous electrolyte battery includes: a positive electrode; a negative electrode; and a nonaqueous electrolyte, wherein the nonaqueous electrolyte contains a solvent, an electrolyte salt, and a polyacid and/or a polyacid compound, and the solvent contains a chain carboxylate with a total carbon number of 4 or more.

Abstract: In one example, a nonaqueous electrolyte and a nonaqueous electrolyte cell are configured to prevent deterioration of the cell capability due to an antioxidant under a high temperature environment with the antioxidant in a small content. In one example, the separator is impregnated with an electrolytic solution. In one example, the electrolytic solution contains a solvent, an electrolyte salt and an antioxidant, the solvent contains a halogenated carbonate ester represented, a content of the halogenated carbonate ester is from 0.1 to 50% by mass, and a content of the antioxidant is from 0.01 to 5,000 ppm.