title: Ruthenium-based electrocatalysts supported on reduced graphene oxide for lithium-air batteries.
abstract: Ruthenium-based nanomaterials supported on reduced graphene oxide (rGO) have been investigated as air cathodes in non-aqueous electrolyte Li-air cells using a TEGDME-LiCF3SO3 electrolyte. Homogeneously distributed metallic ruthenium and hydrated ruthenium oxide (RuO2·0.64H2O), deposited exclusively on rGO, have been synthesized with average size below 2.5 nm. The synthesized hybrid materials of Ru-based nanoparticles supported on rGO efficiently functioned as electrocatalysts for Li2O2 oxidation reactions, maintaining cycling stability for 30 cycles without sign of TEGDME-LiCF3SO3 electrolyte decomposition. Specifically, RuO2·0.64H2O-rGO hybrids were superior to Ru-rGO hybrids in catalyzing the OER reaction, significantly reducing the average charge potential to ∼3.7 V at the high current density of 500 mA g(-1) and high specific capacity of 5000 mAh g(-1).
authors.affiliation: Department of Energy Engineering, Hanyang University, Seoul 133-791, Republic of Korea.
authors.forename: Hun-Gi
authors.initials: HG
authors.lastname: Jung
authors.forename: Yo Sub
authors.initials: YS
authors.lastname: Jeong
authors.forename: Jin-Bum
authors.initials: JB
authors.lastname: Park
authors.forename: Yang-Kook
authors.initials: YK
authors.lastname: Sun
authors.forename: Bruno
authors.initials: B
authors.lastname: Scrosati
authors.forename: Yun Jung
authors.initials: YJ
authors.lastname: Lee
mesh_terms: D000327:Adsorption; D000388:Air; D002384:Catalysis; D011211:Electric Power Supplies; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006108:Graphite / Q000737:chemistry*; D008094:Lithium / Q000737:chemistry*; D050997:Nanomedicine; D053758:Nanoparticles / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry*; D010316:Particle Size; D012428:Ruthenium / Q000737:chemistry*
chemical_list: D010087:Oxides; D006108:Graphite; D012428:Ruthenium; D008094:Lithium