Ruthenium oxide modified hierarchically porous boron-doped graphene aerogels as oxygen electrodes for lithium-oxygen batteries.

ABSTRACT: Suitable catalysts and reasonable structures for oxygen electrodes can effectively improve the electrochemical performance of lithium-oxygen batteries. In this work, ruthenium oxide modified boron-doped hierarchically porous reduced graphene aerogels (RuO₂-B-HRG) are prepared by a sol-gel and subsequent low temperature annealing method and used as oxygen electrodes. The RuO₂ nanoparticles (5-10 nm) are uniformly anchored in the three-dimensional B-HRG continuous electric network. The RuO₂-B-HRG aerogel possesses a large specific surface area (287.211 m² g^-1) and numerous mesopores and micropores. The pores facilitate electrolyte impregnation and oxygen diffusion, and they provide greatly increased accommodation space for the discharge

SUBMITTER: Zhang X 

PROVIDER: S-EPMC9091283 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature