High-Performance Li-O₂ Batteries with Controlled Li₂O₂ Growth in Graphene/Au-Nanoparticles/Au-Nanosheets Sandwich.

ABSTRACT: The working of nonaqueous Li-O₂ batteries relies on the reversible formation/decomposition of Li₂O₂ which is electrically insulating and reactive with carbon and electrolyte. Realizing controlled growth of Li₂O₂ is a prerequisite for high performance of Li-O₂ batteries. In this work, a sandwich-structured catalytic cathode is designed: graphene/Au-nanoparticles/Au-nanosheets (G/Au-NP/Au-NS) that enables controlled growth of Li₂O₂ spatially and structurally. It is found that thin-layer Li₂O₂ (below 10 nm) can grow conformally on the surface of Au NPs confined in between graphene and Au NSs. This unique crystalline behavior of Li₂O₂ effectively relieves or defer

SUBMITTER: Wang G 

PROVIDER: S-EPMC5095780 | biostudies-literature | 2016 Oct

REPOSITORIES: biostudies-literature