C01B33/22

Process for making synthetic minerals

Methods for making a synthetic mineral and methods for making synthetic mineral precursors and the products of said methods.

ANODE MATERIAL, PREPARATION METHOD THEREOF AND SECONDARY BATTERY

An anode material including a silicon-based core and a carbon layer disposed on at least part of a surface of the silicon-based core are described. The silicon-based core includes nano-silicon and a silicate containing a metal M element. The anode material is subjected to section and energy spectrum analysis, k110, k25, and 0.1<k2/k11 are satisfied. The method for preparing the anode material includes: heating and evaporating the pre-disproportionated silicon oxide material and M metal source material to obtain silicon oxide gas and metal source gas; mixing and condensing these two gases to obtain the core material; and performing carbon coating treatment to obtain the anode material. The metal silicate in the prepared anode material effectively separates a nano-silicon domain and a silicon oxide domain, is relatively uniform in distribution, and has high initial Coulombic efficiency and good cycle performance.