Facile synthesis of Nano-SiO2@RF@TiO2 anode for lithium-ion batteries

Silicon dioxide (SiO 2 ), attributed to its exceptional specific capacity, vast resource availability, and cost-effectiveness, has emerged as a promising anode candidate for lithium-ion batteries. Nevertheless, its inherent drawbacks of poor electrical conductivity and pronounced volume expansion during charge/discharge cycles pose significant obstacles to widespread adoption. To address these challenges, innovative strategies involving the design of nanostructured SiO 2 and its integration with coatings have been explored. The unique structure of the resultant SiO 2 -based composites (SiO 2 @RF@TiO 2 ) profoundly facilitates the swift diffusion of both Li + ions and electrons, enhances the accessibility of active sites for Li + insertion, and effectively accommodates the volume fluctuations of SiO 2 during operation. The SiO 2 @RF@TiO 2 composite demonstrates remarkable performance, exhibiting a superior specific capacity of 502 mA h g −1 at a current density of 100 mA g −1 , outstanding rate capability and enhanced cycling stability (retaining 323 mA h g −1 at 200 mA g −1 after 900 cycles), all of which surpass the SiO 2 @RF, thereby offering a compelling solution for the development of high-performance SiO 2 -based anodes for lithium-ion batteries.