NEGATIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM ION SECONDARY BATTERY, NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY, AND LITHIUM ION SECONDARY BATTERY

NEGATIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM ION SECONDARY BATTERY, NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY, AND LITHIUM ION SECONDARY BATTERY

A negative electrode active material for a lithium ion secondary battery comprising silicon oxide particles having carbon present in a portion or the entirety of the surface thereof wherein the ratio(PSi/PSiO 2) of the X ray diffraction peak intensity at 2Theta = 27D to 29D originating from Si, rela...

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Bibliographische Detailangaben
Hauptverfasser: NISHIDA TATSUYA, OHSAKI YOSHIE, YASUDA AKIRA
Format: Patent
Sprache:chi ; eng
Schlagworte:
BASIC ELECTRIC ELEMENTS
ELECTRICITY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Beschreibung
Zusammenfassung:A negative electrode active material for a lithium ion secondary battery comprising silicon oxide particles having carbon present in a portion or the entirety of the surface thereof wherein the ratio(PSi/PSiO 2) of the X ray diffraction peak intensity at 2Theta = 27D to 29D originating from Si, relative to the X ray diffraction peak intensity at 2Theta=20D to 25D originating from SiO2, falls in the range of 1.0 to 2.6 when CuKAlpha radiation with a wavelength of 0.15406 nm is used as the beam source, and the aspect ratio represented by the ratio (S/L) between a long axis L and a short axis Sthereof, has a mean value that falls in the range of 0.45