Building a rational nanoarchitecture of TiO2 nanowires/RGO composite is a promising method to satisfy the demands of excellent Li+/Na+ storage performance.

Silicon oxycarbides (SiOC) are regarded as potential anode materials for lithium-ion batteries, although inferior cycling stability and rate performance greatlyl imit their practical applications. Herein, amorphous SiOC is synthesized from Chlorella by means of ab iotemplate methodb ased on supercritical fluid technology.O nt his basis, tin particles with sizes of several nanometersa re introduced into the SiOC matrix through the biosorptionf eature of Chlorella. As lithi-um-ionb attery anodes,S iOC and Sn@SiOC can deliver reversible capacities of 440 and 502 mAh g À1 after 300 cycles at 100 mA g À1 with great cyclings tability. Furthermore, as-synthesized Sn@SiOC presents an excellent high-rate cycling capability, which exhibits ar eversible capacity of 209 mAh g À1 after 800 cycles at 5000 mA g À1 ;t his is 1.6 times higher than that of SiOC. Such an ovel approach has significancef or the preparation of high-performance SiOC-based anodes.

No abstract