Graphene-containing metalized silicon oxide composite materials

Abstract

Active material composite particles, an electrode including the composite particles, a lithium ion secondary battery including the electrode, and method of forming the same, in which the composite particles each include a core particle including an alkali metal or an alkali earth metal silicate, and a coating disposed on the surface of the core particle. The coating includes turbostratic carbon having a Raman spectrum having: a D band having a peak intensity (ID) at wave number between 1330 cm−1 and 1360 cm−1; a G band having a peak intensity (IG) at wave number between 1580 cm−1 and 1600 cm−1; and a 2D band having a peak intensity (I2D) at wave number between 2650 cm−1 and 2750 cm−1, wherein a ratio of ID/IG ranges from greater than zero to about 1.1, and a ratio of I2D/IG ranges from about 0.4 to about 2.

Dependencies are inferred from the claim text.