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

PROBLEM TO BE SOLVED: To provide a negative electrode active material and a negative electrode plate for lithium ion secondary battery having a large negative electrode capacity.SOLUTION: The negative electrode active material contains at least one type of short/long cup stacked type carbon nanotube...

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Bibliographische Detailangaben
1. Verfasser:	SHIOZAKI SHIGERU
Format:	Patent
Sprache:	eng
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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Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a negative electrode active material and a negative electrode plate for lithium ion secondary battery having a large negative electrode capacity.SOLUTION: The negative electrode active material contains at least one type of short/long cup stacked type carbon nanotube of 3 μm or less in length, in which a single graphene sheet having a cup-like structure with its bottom opened and a plurality of graphene sheets having a cup-like structure are laminated. At least one type of the short/long cup stacked type carbon nanotube of 3 μm or less in length, in which a single graphene sheet having a cup-like structure with its bottom opened and a plurality of graphene sheets having a cup-like structure are laminated, may be fluorinated. The length of the short/long cup stacked type carbon nanotube is preferably 500 nm or less. The negative electrode plate made from the negative electrode active material can achieve a negative electrode capacity close to the theoretical capacity.