Intercalation-type catalyst for non-aqueous room temperature sodium-sulfur batteries.

ABSTRACT: Ambient-temperature sodium-sulfur (Na-S) batteries are potential attractive alternatives to lithium-ion batteries owing to their high theoretical specific energy of 1,274 Wh kg^-1 based on the mass of Na₂S and abundant sulfur resources. However, their practical viability is impeded by sodium polysulfide shuttling. Here, we report an intercalation-conversion hybrid positive electrode material by coupling the intercalation-type catalyst, MoTe₂, with the conversion-type active material, sulfur. In addition, MoTe₂ nanosheets vertically grown on graphene flakes offer abundant active catalytic sites, further boosting the catalytic activity for sulfur redox. When used as a composite positive electrode and assembled in a coin cell with excess Na, a discha

SUBMITTER: He J 

PROVIDER: S-EPMC10582099 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature