NEGATIVE ELECTRODE ACTIVE MATERIAL AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

Provided are a negative electrode active material having excellent charge-discharge characteristics (charge-discharge capacity, initial coulombic efficiency, and cycle characteristics) and a nonaqueous electrolyte secondary battery containing the negative electrode active material. The negative elec...

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Bibliographische Detailangaben
Hauptverfasser:	SHIMIZU Masayoshi, KAWASE Kenichi, ZHU Peixin, KATANO Satoshi
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BASIC ELECTRIC ELEMENTS CAPACITORS CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE CHEMISTRY COMPOUNDS THEREOF ELECTRICITY INORGANIC CHEMISTRY METALLURGY NON-METALLIC ELEMENTS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Beschreibung
Zusammenfassung:	Provided are a negative electrode active material having excellent charge-discharge characteristics (charge-discharge capacity, initial coulombic efficiency, and cycle characteristics) and a nonaqueous electrolyte secondary battery containing the negative electrode active material. The negative electrode active material according to the present invention is a negative electrode active material containing composite particles in which silicon nanoparticles are dispersed inside a matrix containing silicon oxycarbide and a carbonaceous phase. The negative electrode active material has a crystalline particle size of 40 nm or less determined by the Scherrer method from a full width at half maximum (FWHM) of a diffraction line attributed to Si(111) around 2θ = 28.4° in analysis of an X-ray diffraction pattern.