NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

• Main Authors: KO, Takashi, GOTO, Natsumi, TSURUTA, Sho, NIINA, Fumiharu, KINTSU, Kohei
• Format: Patent
• Language: English; French; German
• Published: 09.08.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

Provided is a non-aqueous electrolyte secondary battery, wherein: a positive electrode active material includes a lithium transition metal composite oxide containing at least Ni, Mn, and B; the proportion of Ni with respect to the total amount of metal elements, excluding Li, in the lithium transition metal composite oxide is in the range of 80 mol%≤Ni≤95 mol%; the proportion of Mn with respect to the total amount of metal elements, excluding Li, in the lithium transition metal composite oxide is in the range of 0 mol%<Mn≤20 mol%; the proportion ofB with respect to the total amount of metal elements, excluding Li, in the lithium transition metal composite oxide is in the range of 0 mol%<B≤3 mol%; the lithium transition metal composite oxide has B at least on the surface thereof; and a negative electrode mixture layer has B at least on the surface thereof, and contains B in an amount of 30-1000 mass ppm with respect to the total mass of the negative electrode mixture layer.