Synergistic effect of defects and heterostructures endowing bronze titanium dioxide with superior lithium storage performances

Abstract

Bronze titanium dioxide (TiO2(B)) as anode materials in lithium-ion batteries (LIBs) have attracted widespread attentions, due to their especial channels and high specific capacity. However, poor electrical/ionic conductivity and limited electrochemical kinetics hinder the practical applications of TiO2(B). Here, we use a simple strategy to construct TiO2(B)-carbon nanosheets heterostructures that combine the merits of highly conductive carbon nanosheets with defect-rich TiO2(B), and thus achieving superior cycling performances with high specific capacities of 205 mAh/g at 2.0C and 162 mAh/g at 5.0C over 800cycles, and superior rate capability.