TiO? Nanobelt@Co?S? Composites as Promising Anode Materials for Lithium and Sodium Ion Batteries.

ABSTRACT: TiO? anodes have attracted great attention due to their good cycling stability for lithium ion batteries and sodium ion batteries (LIBs and SIBs). Unfortunately, the low specific capacity and poor conductivity limit their practical application. The mixed phase TiO? nanobelt (anatase and TiO?-B) based Co?S? composites have been synthesized via the solvothermal reaction and subsequent calcination. During the formation process of hierarchical composites, glucose between TiO? nanobelts and Co?S? serves as a linker to increase the nucleation and growth of sulfides on the surface of TiO? nanobelts. As anode materials for LIBs and SIBs, the composites combine the advantages of TiO? nanobelts with those of Co?S? nanomaterials. The reversible specific capacity of TiO? nanobelt@Co?S? composites is up to 889 and 387 mAh·g^-1 at 0.1 A·g^-1 after 100 cycles, respectively. The cooperation of excellent cycling stability of TiO? nanobelts and high capacities of Co?S? nanoparticles leads to the good electrochemical performances of TiO? nanobelt@Co?S? composites.

SUBMITTER: Zhou Y 

PROVIDER: S-EPMC5618363 | biostudies-literature | 2017 Sep

REPOSITORIES: biostudies-literature