In-situ fabricate highly ordered 3D Cervantite@TiO2 nanoarrays integrated electrode as additive-free anode for lithium/sodium-ion batteries

Abstract

Antimony anode has fascinated increasing advertence with its appropriate voltage platform and high theoretical capacity for lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs). However, poor structural stability is the major bottleneck for future development. Herein, a performance-oriented electrode structure is proposed, which is a sort of 3D cervantite@TiO2 (Sb3+Sb5+O4@TiO2) nanoarrays integrated additive-free electrode with highly orderliness, exceptional para-vertical alignment, and appropriate interval spacing. Benefiting from these structural merits, the 3D cervantite@TiO2 anode employed for LIBs supplies an invertible specific capacity as high as 487.4 mAh g−1 at 1 A g−1 after 100 cycles and an exceptional high-rate capacity of 351.6 mAh g−1 at 10 A g−1. Furthermore, as an anode for SIBs, it can also reveal an invertible specific capacity of 316.1 mAh g−1 at 0.5 A g−1 after 50 cycles and brilliant rate performance with a specific capacity of 191 mAh g−1 at 5 A g−1. These admirable electrochemical performances can be of visible significance for developing more applications of 3D nanoarrays additive-free electrodes in energy storage devices.