Boosting High-Rate Li-S Batteries by an MOF-Derived Catalytic Electrode with a Layer-by-Layer Structure.

ABSTRACT: Rechargeable high-energy lithium-sulfur batteries suffer from rapid capacity decay and poor rate capability due to intrinsically intermediate polysulfides' shuttle effect and sluggish redox kinetics. To tackle these problems simultaneously, a layer-by-layer electrode structure is designed, each layer of which consists of ultrafine CoS₂-nanoparticle-embedded porous carbon evenly grown on both sides of reduced graphene oxide (rGO). The CoS₂ nanoparticles derived from metal-organic frameworks (MOFs) have an average size of ≈10 nm and can facilitate the conversion between Li₂S₆ and Li₂S₂/Li₂S in the liquid electrolyte by a catalytic effect, leading to improved polysulfide redox kinetics. In addition, the interconnecte

SUBMITTER: Li W 

PROVIDER: S-EPMC6702624 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature