In situ reactive coating of metallic and selenophilic Ag₂Se on Se/C cathode materials for high performance Li-Se batteries.

ABSTRACT: A facile methodology to fabricate a metallic and selenophilic Ag₂Se coating on a Se/nitrogen-doped mesoporous carbon composite, has been successfully developed based on the in situ redox reaction between Se and AgNO₃ under ambient conditions. The in situ reactive growth of Ag₂Se on Se ensures the complete encapsulation of Se by the Ag₂Se coating, which endows the Ag₂Se coating with the dual effects of physical entrapment and chemical binding to effectively confine polyselenide intermediates within the cathodes. With the further assistance of mesopore confinement of the nitrogen-doped carbons, the Ag₂Se-coated Se/nitrogen-doped mesoporous carbon composites present much improved electrochemical performances with

SUBMITTER: Sun F 

PROVIDER: S-EPMC9086314 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature