Abstract: A positive electrode material for a secondary battery, wherein the positive electrode material includes a triclinic crystal structure.

Abstract: An optimization device is configured to perform an iteration processing until a predetermined condition is satisfied, the iteration processing including: processing of generating a quadratic function that is approximate to an objective function within a predetermined range from a first reference value that indicates a value of a variable of the objective function; processing of calculating a second reference value that indicates a value of the variable by seeking for an extreme value of the quadratic function; processing of calculating a third reference value that indicates a value of the variable based on the second reference value and the first reference value; and processing of updating the first reference value based on the third reference value, the predetermined condition being a condition regarding a distance between the first reference value and the second reference value or a distance between the first reference value and the third reference value.

Abstract: A crystalline solid electrolyte includes: Li3PO4, Li4SiO4, and Li3BO3 and content of the Li3PO4 is less than or equal to 75 mole %.

Abstract: A positive electrode material for a secondary battery, wherein the positive electrode material includes a triclinic crystal structure.

Abstract: A positive electrode material for a secondary battery, includes: a composition represented by Li4+xFe4+y(P2O7)3 (?0.80?x?0.60, ?0.30?y?0.40, and ?0.30?x+y?0.30); and tungsten, wherein the positive electrode material has a triclinic crystal structure.

Abstract: A positive electrode material for a secondary battery, wherein the positive electrode material includes a triclinic crystal structure and is represented by Li4+x(Fe1?zMz)4?0.5x(P2O7)3, where ?0.65?x?0.75, 0.0<z?0.7, and M represents a divalent metal other than Fe.

Abstract: A positive electrode material has diffraction peaks at 2?=13.1°±0.2°, 14.0°±0.2°, and 18.4°±0.2° in X-ray diffraction (2?=5° to 90°) using synchrotron radiation having a wavelength of 1 ?, has a monoclinic crystal structure belonging to a space group P21/c, and is represented by a composition formula Li2?2xCo1+xP2O7 (?0.2?x?0.2).

Abstract: A positive electrode active material for lithium ion rechargeable battery is disclosed. The positive electrode active material is represented by composition formula: Li2-XMgXCoP2O7, wherein X is equal to or greater than 0.01 and equal to or smaller than 0.2.

Abstract: A solid electrolyte which is an oxide-based solid electrolyte, the solid electrolyte includes lithium (Li), phosphorus (P), boron (B), sulfur (S), and oxygen (O) as constituent elements.

Abstract: A positive electrode material for a secondary battery, includes: a composition represented by Li4+xFe4+y(P2O7)3 (?0.80?x?0.60, ?0.30?y?0.40, and ?0.30?x+y?0.30); and tungsten, wherein the positive electrode material has a triclinic crystal structure.

Abstract: A positive electrode material for a secondary battery, wherein the positive electrode material includes a triclinic crystal structure and is represented by Li4+x(Fe1?zMz)4?0.5x(P2O7)3, where ?0.65?x?0.75, 0.0<z?0.7, and M represents a divalent metal other than Fe.

Abstract: A fire detection device includes a gas sensor, a measuring instrument, and a control device. The gas sensor is configured to detect a gaseous substance in a measurement space. The gas sensor is configured to output a first result of the detection. The measuring instrument is configured to measure a diameter of each particle existing in the measurement space and count a number of particles for each of diameter ranges to generate distribution data. The control device includes a processor. The processor is configured to determine, on basis of the first result acquired from the gas sensor, whether a smoke exists in the measurement space. The processor is configured to start the measuring instrument upon determining that a smoke exists in the measurement space. The processor is configured to determine, on basis of first distribution data acquired from the measuring instrument, whether a fire has occurred.

Abstract: A fire detection device includes a gas sensor, a measuring instrument, and a control device. The gas sensor is configured to detect a gaseous substance in a measurement space. The gas sensor is configured to output a first result of the detection. The measuring instrument is configured to measure a diameter of each particle existing in the measurement space and count a number of particles for each of diameter ranges to generate distribution data. The control device includes a processor. The processor is configured to determine, on basis of the first result acquired from the gas sensor, whether a smoke exists in the measurement space. The processor is configured to start the measuring instrument upon determining that a smoke exists in the measurement space. The processor is configured to determine, on basis of first distribution data acquired from the measuring instrument, whether a fire has occurred.