NEGATIVE ELECTRODE ACTIVE MATERIAL AND NONAQUEOUS SECONDARY BATTERY

NEGATIVE ELECTRODE ACTIVE MATERIAL AND NONAQUEOUS SECONDARY BATTERY

A negative electrode active material for a nonaqueous secondary battery includes graphite containing boron. The graphite has a crystallite size Lc of 100 nm or more in the c-axis direction, In a Raman spectrum obtained by Raman spectroscopy of a surface of the graphite, a ratio R is 0.4 or more, the...

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Bibliographische Detailangaben
Hauptverfasser: NAKATSUTSUMI, TAKAYUKI, OKANO, TETSUYUKI, MAENISHI, MAYUMI, HOJO, NOBUHIKO
Format: Patent
Sprache:eng
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 for a nonaqueous secondary battery includes graphite containing boron. The graphite has a crystallite size Lc of 100 nm or more in the c-axis direction, In a Raman spectrum obtained by Raman spectroscopy of a surface of the graphite, a ratio R is 0.4 or more, the ratio R being a ratio of a maximum peak value Id of Raman intensity of a D band appearing in a Raman shift range of 1300 cm−1 or more and 1400 cm−1 or less to a maximum peak value Ig of Raman intensity of a G band appearing in a Raman shift range of 1500 cm−1 or more and 1650 cm−1 or less.