Electrocatalytic activity of lithium polysulfides adsorbed into porous TiO₂ coated MWCNTs hybrid structure for lithium-sulfur batteries.

ABSTRACT: Lithium-sulfur batteries have attracted great attention because of their high energy density, environmental friendliness, natural abundance and intrinsically low cost of sulfur. However, their commercial applications are greatly hindered by rapid capacity decay due to poor conductivity of electrode, fast dissolution of the intermediate polysulfides into the electrolyte, and the volume expansion of sulfur. Herein, we report a novel composite MWCNTs@TiO₂-S nanostructure by grafting TiO₂ onto the surface of MWCNTs, followed by incorporating sulfur into the composite. The inner MWCNTs improved the mechanical strength and conductivity of the electrode and the outer TiO₂ provided the adsorption sites to immobilize polysulfides due to bonding interaction between T

SUBMITTER: He X 

PROVIDER: S-EPMC5241630 | biostudies-literature | 2017 Jan

REPOSITORIES: biostudies-literature