Facile and Efficient Synthesis of SiOx@C Core-Shell Particles as an Anode Material for Lithium Ion Batteries

摘要

Core-shell particles have attracted broad interests in recent years for their remarkable properties and a wide range of potential applications,but the precise design and control of their structure remains a significant challenge.In this work,we propose a strategy to synthesize carbon coated SiOx(SiOx@C)core-shell particles via a sol-gel method using the simultaneous hydrolysis-condensation of tetramethyl orthosilicate(TMOS)and polymerization of 3-aminophenol and formaldehyde.The synthetic process was conducted in the presence of ammonia as a basic catalyst and cetyltrimethylammonium bromide(CTAB)as a cationic surfactant in a mixed water/methanol solution followed by the carbonization process.Results from this study provide new insight into the design of core-shell particles by using TMOS as an effective silica precursor for the first time with a well-controlled reaction rate and spherical morphology.To demonstrate the benefits of core-shell structure in energy storage,the performance of SiOx@C as an anode material for lithium ion batteries(LIBs)is evaluated.