NEGATIVE ELECTRODE MATERIAL FOR LITHIUM-ION BATTERY, AND USE THEREFOR

摘要

A negative electrode material for lithium-ion batteries that comprises a composite material that includes silicon-containing particles, graphite carbonaceous material particles, and a carbon carbonaceous material. Upon observation of the composite material by XPS measurement, the ratio (A/B) of the area (A) of the peak derived from metallic Si near 100eV relative to the area (B) of the peak derived from silicon oxide near 103eV is 0.10-2.30. A lithium-ion battery can be obtained using said negative electrode material.