Abstract: A positive electrode material includes: Li2Ni?M1?M2?Mn?O4-?; a layered structure including a Li layer and a Ni layer; and a chemical bond of M2-O. ? satisfies an equation of 0.50<??1.33. ? satisfies an equation of 0??<0.67. ? satisfies an equation of 0.33???1.1. ? satisfies an equation of 0???1.00. ? satisfies an equation of 0???1.00. M1 represents at least one selected from Co and Ga. M2 represents at least one selected from Ge, Sn and Sb.

Abstract: A positive electrode material includes Li2Ni?M1?M2?O4-?, where 0<(?+?)?2; 0??<0.5; 0<??2; 0???1; 1?(?+?+?)?2.1; 0.8<?/(?+?); M1 is Mn; M2 is at least one selected from Ge and Sn; and Ni and M1 has a local structure of six-coordination. The positive electrode material is used for a positive electrode for nonaqueous-electrolyte secondary battery and a nonaqueous-electrolyte secondary battery.

Abstract: A positive electrode material includes: Li2Ni?M1?M2?Mn?O4-? that has a layered structure including a Li layer and a Ni layer, and in which a Ni—O bond length is shorter than that calculated from the Shannon's ionic radii. ? satisfies a relation of 0.50<??1.33, ? satisfies a relation of 0??<0.67, ? satisfies a relation of 0.33???1.1, ? satisfies a relation of 0???1.00, ? satisfies a relation of 0???1.00, M1 represents at least one selected from Co and Ga, M2 represents at least one selected from Ge, Sn and Sb. A positive electrode material may indicate a peak intensity ratio (I003/I104) of 0.9 or more in a measurement of a powder X-ray diffraction indexed with a space group of R3m.

Abstract: A positive electrode material includes: a composite oxide of solid solution including Li2SnO3 and Li2Ni?M1?M2?Mn?O4-?. ? satisfies an equation of 0.50???1.35. ? satisfies an equation of 0??<1.0. ? satisfies an equation of 0???0.66. ? and ? satisfies an equation of 0.33??+??1.1. ? satisfies an equation of 0???0.66. ? satisfies an equation of 0???1.00. M1 represents at least one selected from Sn, Sb0.5Al0.5. M2 represents Sb.

Abstract: A positive electrode material includes: Li2Ni?M1?M2?Mn?O4-?. ? satisfies a relational expression of 0.50<??1.33. ? satisfies a relational expression of 0.33???1.1. ? satisfies a relational expression of 0???1.00. ? satisfies a relational expression of 0??<0.67. ? satisfies a relational expression of 0???1.00. M1 is at least one type selected from Co and Ga. M2 is at least one type selected from Ge, Sn, and Sb. Li2Ni?M1?M2?Mn?O4-? has a layered structure which includes a Li layer and a Ni layer. A crystal structure of Li2Ni?M1?M2?Mn?O4-? is a superlattice structure.

Abstract: A secondary battery has a positive electrode and a negative electrode, and is charged and discharged. A charge-discharge control unit controls charge and discharge of the secondary battery, and includes a storage unit, a calculating unit, and a control processing unit. The storage unit stores therein charge-discharge characteristics of the secondary battery. The calculating unit calculates a charge-discharge condition of the secondary battery based on the charge-discharge characteristics stored in the storage unit. The control processing unit charges and discharges the secondary battery based on the charge-discharge condition. The storage unit stores therein model data of degradation.

Abstract: A positive electrode material includes Li2Ni?M1?M2?O4-?, where 0<(?+?)?2; 0??<0.5; 0<??2; 0???1; 1?(?+?+?)?2.1; 0.8<?/(?+?); M1 is Mn; M2 is at least one selected from Ge and Sn; and Ni and M1 has a local structure of six-coordination. The positive electrode material is used for a positive electrode for nonaqueous-electrolyte secondary battery and a nonaqueous-electrolyte secondary battery.

Abstract: A positive electrode material includes: a composite oxide of solid solution including Li2SnO3 and Li2Ni?M1?M2?Mn84 O4-?. ? satisfies an equation of 0.50???1.35. ? satisfies an equation of 0 ??<1.0. ? satisfies an equation of 0???0.66. ? and ? satisfies an equation of 0.33??+??1.1. ? satisfies an equation of 0???0.66. ? satisfies an equation of 0???1.00. M1 represents at least one selected from Sn, Sb0.5Al0.5. M2 represents Sb.

Abstract: A positive electrode material includes: Li2Ni?M1?M2?Mn?O4-?; a layered structure including a Li layer and a Ni layer; and a chemical bond of M2-O. ? satisfies an equation of 0.50<??1.33. ? satisfies an equation of 0??<0.67. ? satisfies an equation of 0.33???1.1. ? satisfies an equation of 0??<1.00. ? satisfies an equation of 0???1.00. M1 represents at least one selected from Co and Ga.

Abstract: A positive electrode material includes: Li2Ni?M1?M2?Mn?O4-? that has a layered structure including a Li layer and a Ni layer, and in which a Ni—O bond length is shorter than that calculated from the Shannon's ionic radii. ? satisfies a relation of 0.50<??1.33, ? satisfies a relation of 0??<0.67, ? satisfies a relation of 0.33???1.1, ? satisfies a relation of 0???1.00, ? satisfies a relation of 0??1.00, M1 represents at least one selected from Co and Ga, M2 represents at least one selected from Ge, Sn and Sb. A positive electrode material may indicate a peak intensity ratio (I003/I104) of 0.

Abstract: A lithium-ion secondary battery includes: a first cathode active material having a polyanion structure which stores and releases a lithium ion; and a second cathode active material having a lithium diffusion coefficient different from a lithium diffusion coefficient of the first cathode active material. The second cathode active material has a layered rock salt-type structure. A discharge curve of the first cathode material and a discharge curve of the second cathode material intersect with each other at at least two points.

Abstract: A cathode active material for a nonaqueous electrolyte secondary battery includes a core part and a shell part arranged to a surface of the core part. The core part includes an inorganic oxide having a polyanion structure. The inorganic oxide is LixMnyM1-yXO4, in which M is at least one of Co, Ni, Fe, Cu, Cr, Mg, Ca, Zn, and Ti, X is at least one of P, As, Si, and Mo, and 0?x<1.0 and 0.5?y?1.0. The inorganic oxide has a maximum mass change ratio G1 in a temperature range from a room temperature to 250° C. when heated under inert atmosphere, and has a maximum mass change ratio G2 in a temperature range from 350° C. to 500° C. when heated under inert atmosphere. A difference between the maximum mass change ratio G2 and the maximum mass change ratio G1 is less than or equal to 5%.

Abstract: A positive electrode active material includes a conductive matrix and a lithium metal compound of a polyanion structure provided on the surface of the conductive matrix. The lithium metal compound is expressed as Li?M0?X?O4-?Z?, in which: M0 is one or more selected from Mn, Co, Ni, Fe, Cu, Cr, Mg, Ca, Zn, and Ti; X is one or more selected from P, As, Si, Mo, and Ge; Z is one or more selected from Al, Mg, Ca, Zn, and Ti, being optionally includable; ? satisfies 0???2.0; ? satisfies 0???1.5; ? satisfies 1???1.5; and ? satisfies 0???1.5.