Negative electrode material for lithium ion secondary battery, negative electrode for lithium ion secondary battery, lithium ion secondary battery, and method for producing negative electrode material for lithium ion secondary battery

Abstract

To provide a negative electrode material for a lithium ion secondary battery having excellent cycle characteristics while using silicon having a large charge capacity, and to provide a negative electrode for a lithium ion secondary battery using the same.SOLUTION: The negative electrode material for the lithium ion secondary battery contains silicon particles and a binder resin, and contains both a conductive binder resin and a non-conductive binder resin as the binder resin. When the conductive binder was used as a part of the binder resin, the cycle characteristics were improved as compared with the case of using a conductive aid such as carbon black which has been conventionally used.SELECTED DRAWING: Figure 1

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