NEGATIVE ELECTRODE FOR NONAQUEOUS SECONDARY BATTERY, ITS MANUFACTURING METHOD, AND NONAQUEOUS SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a non-aqueous secondary battery that has a high capacity and a long life, a negative electrode for constituting the non-aqueous secondary battery, and their manufacturing method.

SOLUTION: This is the negative electrode for the non-aqueous secondary battery which has a negative electrode mixture layer on at least one face of a metal support, and which can store and release lithium ion, in which the negative electrode mixture layer has a thickness of 10 to 150 μm, and is composed of a lower layer (I) that contains carbon particles as an active material, contains styrene-butadiene-rubber or carboxymethyl cellulose d as a binder, and has a thickness of 5 to 100 μm, and furthermore, of an upper layer (II) that contains the high capacity material as the active material such as a metal which can form an alloy with Li, contains polyimide or fluororesin as a binder, and has a thickness of 5 to 50 μm. This is the manufacturing method of the negative electrode for the non-aqueous secondary battery in which the lower layer (I) is formed by a water-based negative electrode mixture containing composition and the upper layer (II) is formed by a non-water-based negative electrode mixture containing composition, and the non-aqueous secondary battery having the negative electrode.

COPYRIGHT: (C)2007,JPO&INPIT