期刊
ACS NANO
卷 7, 期 4, 页码 3532-3539出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn400477d
关键词
reduced graphene oxide; supported catalysts; ruthenium oxide; lithium-air battery; organic electrolyte
类别
资金
- Human Resources Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) [20124010203310]
- Korea government Ministry of Knowledge Economy
- National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology [2012R1A1A1009029]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20124010203310] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Council of Science & Technology (NST), Republic of Korea [2E23970] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2012R1A1A1009029] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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 center dot 0.64H(2)O), 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 center dot 0.64H(2)O-rGO hybrids were superior to Ru-rGO hybrids in catalyzing the OER reaction, significantly reducing the average charge potential to similar to 3.7 Vat the high current density of 500 mA g(-1) and high specific capacity of 5000 mAh g(-1).
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