CARBONACEOUS SUBSTANCE-COATED GRAPHITE PARTICLES, NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY AND LITHIUM ION SECONDARY BATTERY

A modified novolak-type phenol resin is adhered to graphite particles to obtain resin-adhered graphite particles. The resin-adhered graphite particles are heated at 900-1500°C in a non-oxidizing atmosphere to carbonize the modified novolak-type phenol resin, whereby at least a portion of the surface...

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Hauptverfasser:	KOBAYASHI, Yoshikazu, HAGA, Ryuta, ASAMI, Masakatsu, OBIKA, Motoharu, EGUCHI, Kunihiko
Format:	Patent
Sprache:	eng ; hun
Schlagworte:	BASIC ELECTRIC ELEMENTS 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:	A modified novolak-type phenol resin is adhered to graphite particles to obtain resin-adhered graphite particles. The resin-adhered graphite particles are heated at 900-1500°C in a non-oxidizing atmosphere to carbonize the modified novolak-type phenol resin, whereby at least a portion of the surface of the graphite particles is coated with a carbonaceous film. 5-95 mol% of arylene groups constituting the modified novolak-type phenol resin have a hydroxy group. When the obtained graphite particles coated with a carbonaceous film are used for a negative electrode material for a lithium-ion secondary battery, excellent battery characteristics can be achieved.