TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Process: The silicon dioxide phase is dispersed in the silicon oxide (SiOx) phase and crystalline. The silicon phase and silicon dioxide phase are formed by disproportionation of silicon oxide (SiOx). The metal particles of metal particle-electrodeposited, and SiOx-containing particles are etched. The method further involves disproportionating silicon oxide-containing particles into silicon and silicon dioxide at 750-1000 degrees C for 5-120 minutes by heat treatment, filtering the heat-treated silicon oxide-containing particles, and coating with carbon. Preferred Composition: The silicon dioxide phase contains 2-50 wt.% cristoballite with respect to the weight of silicon-based anode active material. The concentration of the silicon phase is more than the center portion than center-periphery portion of the electrode active material. The concentration of the silicon dioxide phase is more than the center-periphery portion than center portion of the electrode active material. The silicon oxide in silicon oxide (SiOx) phase is silicon monoxide. The electrode active material contains honeycomb-shaped pores on a surface. The cathode active material or anode active material further contains graphite, soft carbon, hard carbon and lithium titanium oxide. The fluorine-based solution is chosen from hydrogen fluoride, fluorosilicate and ammonium fluoride. The metal precursor solution contains silver, gold, platinum and/or copper. The volume ratio of fluorine-based solution and metal precursor solution is 10-90:90-10. The content of silicon oxide-containing particles with respect to 100 pts. wt. mixed solution of fluorine-based solution and metal precursor solution is 0.001-50 pts. wt. The etching solution is a mixed solution of hydrogen fluoride and hydrogen peroxide with volume ratio of 10-90:90-10. The metal removing solution is nitric acid, sulfuric acid or hydrochloric acid. The alkaline hydroxide is chosen from lithium hydroxide, sodium hydroxide, potassium hydroxide, beryllium hydroxide, magnesium hydroxide, calcium hydroxide and hydrate. The content of carbon with respect to the total weight of the electrode active material is 1-30 wt.%. Preferred Definitions:    x=0.5-1.2.