METHOD OF PRODUCING NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, AND NEGATIVE ELECTRODE ACTIVE MATERIAL

METHOD OF PRODUCING NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, AND NEGATIVE ELECTRODE ACTIVE MATERIAL

A negative electrode active material is prepared by mixing a first graphite particle and a second graphite particle. A negative electrode including the negative electrode active material is produced. A non-aqueous electrolyte secondary battery including the negative electrode, a positive electrode,...

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Bibliographische Detailangaben
Hauptverfasser: MATSUO, Yuta, HAYASHI, Kunihiko, TERAUCHI, Masumi, ISHIKAWA, Kaori
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
BASIC ELECTRIC ELEMENTS
ELECTRICITY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Zusammenfassung:A negative electrode active material is prepared by mixing a first graphite particle and a second graphite particle. A negative electrode including the negative electrode active material is produced. A non-aqueous electrolyte secondary battery including the negative electrode, a positive electrode, and an electrolyte solution is produced. The first graphite particle has a first number-based particle size distribution. The second graphite particle has a second number-based particle size distribution. A relationship of "D250/D150 ≤ 0.50" is satisfied. D150 is a D50 in the first number-based particle size distribution. D250 is a D50 in the second number-based particle size distribution. A relationship of "R2 ≤ R1" is satisfied. R1 is an arithmetic mean of circularity of the first graphite particle. R2 is an arithmetic mean of circularity of the second graphite particle.