In situ growth of C/MoS2 heterostructure as stable cathode for high-performance new energy devices

Lithium-sulfur batteries are considered as the most promising energy storage devices owing to their high theoretical energy density and theoretical specific capacity. But some problems hinder their practical application, including low electronic conductivity and polysulfide migration during discharge–charge process. In this work, C/MoS2 heterostructure composites constructed by in situ growth of MoS2 on porous carbon are developed as the sulfur host for lithium-sulfur batteries. The introduction of porous carbon could improve the electronic conductivity of the cathode, as well as the C/MoS2 heterostructure could accelerate the redox kinetics and inhibit the shuttle effect via the adsorption with polysulfide. All of these advantages could improve the electrochemical performance of the lithium-sulfur batteries. This work demonstrates that the employment of hybrid composites as sulfur host is a promising method to improve the electrochemical performance of lithium-sulfur batteries.