Nonaqueous electrolyte secondary battery

• Main Authors: KIYOTA AYA, IKOMA KEI, TSUKUDA AKIMITSU
• Format: Patent
• Language: Chinese; English
• Published: 20.10.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The purpose of the present invention is to provide a non-aqueous electrolyte secondary battery having high safety and high battery voltage. Therefore, the present invention provides a non-aqueous electrolyte secondary battery comprising a positive electrode, a negative electrode, a non-aqueous electrolyte, and a separator, the non-aqueous electrolyte secondary battery being characterized in that the active material of the positive electrode is represented by general formula LixMyOz (M is at least one element selected from the group consisting of Ni, Co, Mn, Al, Mg, and Mo); the composition ratio satisfies 0.8 < = x < = 1.3, 0.5 < = y < = 2, and 1 < = z < = 4. ), the active material of the negative electrode is one or more compounds selected from the group consisting of C-based compounds, Si-based compounds, Sn-based compounds, and metal lithium, or a material containing metal lithium, and the non-aqueous electrolyte solution contains two solvents and is separated by the separator. The composition of the non-a