Amorphous silicon- and oxygen-containing carbonaceous insertion compounds for use as anodes in rechargeable batteries

摘要

Carbonaceous insertion compounds and methods for preparation are described wherein the compounds comprise silicon and oxygen and are characterized by x-ray diffraction patterns that resemble that of amorphous silicon dioxide. The compounds can exhibit a large reversible capacity for lithium and can be prepared by simple pyrolysis of suitable polymer/s containing silicon, oxygen and carbon at an appropriate temperature. These insertion compounds may be suitable for use as high capacity anodes in lithium ion batteries.