Nanobelts-constructed porous TiO2-B@SnS2 heterostructure hybrids for enhanced lithium storage performance

Attributing to the high theoretical capacity and excellent electronic conductivity, alloy reaction type materials get in-depth research by domestic and foreign researchers. However, the materials of this type of electrode exhibit poor kinetics and substantial volume collapse during the repeated lithiation-delithiation process. Herein, an efficient method to provide a fast transmission channel and suppress the volume collapse during the discharge/charge process by constructing the heterostructure between the interface of the porous TiO2-B nanoblets and few-layer SnS2 nanosheets, which provides high-active sites for the nucleation and growth of SnS2 nanosheets, and inhibits the agglomeration of SnS2 nanosheets. Both lithium storage performance and theoretical calculations definite that porous TiO2-B nanobelts offers more active sites for the adsorption and transmission of lithium ion and then effectively improve the stability of the electrode structure. In conclusion, TiO2-B@SnS2 hybrid exhibits better rate and cycle performance than pure SnS2 nanosheets. This work provides practical value for the design and construction of high performance alloy-type anode materials.

Automated summary

This study explores an efficient method to improve the performance of alloy-type materials in lithium batteries, by constructing a heterostructure between TiO2-B and SnS2 to enhance electrode stability and cycle performance.