| 摘要 |
The purpose of the present invention is to provide a negative-electrode material for preparing a lithium-ion secondary-battery negative electrode that has a high energy density and excellent high-current load characteristics while maintaining high output and excellent cycle characteristics. The present invention relates to a negative-electrode material for a lithium-ion secondary battery, the negative-electrode material comprising a mixed graphite material including a graphite (A) made of artificial graphite, and a graphite (B) made by processing natural graphite into spherical lumps, wherein a mixture layer made by applying a mixture that includes said mixed graphite material and a binder onto a copper foil, drying the mixture, and then pressurizing same at 1 t/cm3 has a voidage ranging between 25-36%. |
