Abstract
A simple synthesis has been proposed for seaweed-like amorphous TiO2-x modified Sb (a-TiO2-x/Sb) composite nanowires as sodium-ion battery (SIBs) anodes by a dealloying method of Al-Sb-Ti alloys. Compared with other conventional methods, this method has the advantages of simple preparation, high yield and easy large-scale synthesis. It is excitingly discovered that a-TiO2-x/Sb effectively alleviates volume changes and stabilizes the solid electrolyte interface (SEI). The a-TiO2-x/Sb nanowires electrodes deliver outstanding electrochemical performance based on the synergistic effects, exhibiting a high reversible capacity of 591.9 mA h g−1 at 100 mA g−1, stable cycling performance with a high capacity retention of 96.4% after 200 cycles and superior rate capability 382.2 mA h g−1 at 10,000 mA g−1, which is very competitive among the reported Sb-based anodes.
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