Janus Separator of Polypropylene-Supported Cellular Graphene Framework for Sulfur Cathodes with High Utilization in Lithium-Sulfur Batteries.

ABSTRACT: Owing to the conversion chemistry of the sulfur cathode, the lithium-sulfur (Li-S) batteries exhibit high theoretical energy density. However, the intrinsic mobile redox centers during the sulfur/Li₂S-to-lithium polysulfides solid-to-liquid phase transition induce low sulfur utilization and poor cycling life. Herein, the Janus separator of mesoporous cellular graphene framework (CGF)/polypropylene membrane to promote the utilization of sulfur cathode is introduced. The porous polypropylene membrane serves as an insulating substrate in contact with lithium anode while CGFs that possess high electrical conductivity of 100 S cm^-1, a large mesopore volume of 3.1 cm³ g^-1, and a huge surface area of 2120 m² g^-1 are adhered on cath

SUBMITTER: Peng HJ 

PROVIDER: S-EPMC5054863 | biostudies-literature | 2016 Jan

REPOSITORIES: biostudies-literature