Figure 1. XRD patterns of SiO2/C composite material prepared from rice husks.
As shown in Figure 1 , the structure of silica carbon material prepared from rice husk as raw material was characterized by X-ray diffraction. The synthesis process of SiO2/C anode material was reported elsewhere. [23] XRD patterns of silica carbon material exhibited broad peak spreading from 20 – 27oconfirming the presence of amorphous silica and carbon. In addition, the diffraction peak of 43 – 44o is represented for the amorphous carbon. [9] As a result, SiO2/C synthesized has no impurities which are compatible for anode application.