Ruthenium-based Electrocatalysts Supported on Reduced Graphene Oxide for Lithium-Air Batteries

Title
Ruthenium-based Electrocatalysts Supported on Reduced Graphene Oxide for Lithium-Air Batteries
Authors
정훈기정요섭박진범선양국Bruno Scrosati이윤정
Keywords
reduced graphene oxide; supported catalysts; ruthenium oxide; lithium-air battery; organic electrolyte
Issue Date
2013-04
Publisher
ACS Nano
Citation
VOL 7, NO 4, 3532-3539
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 3 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 3 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.
URI
http://pubs.kist.re.kr/handle/201004/46224
ISSN
19360851
Appears in Collections:
KIST Publication > Article
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