Catalytic activity of carbon-sphere/Co3O4/RuO2 nanocomposite for Li-air batteries
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A carbon-sphere/Co3O4/RuO2 nanocomposite was fabricated as part of a new approach to develop advanced Li–air batteries. The nanocomposite showed homogeneously dispersed Co3O4 and RuO2 nanoparticles on the surface of carbon spheres, whose shape was effective in increasing the catalytic surface area and enhancing the stability of carbon and the catalyst. A high discharge capacity, relatively stable reversibility, and low overpotential were observed in electrochemical tests of an electrode containing this carbon-sphere/Co3O4/RuO2 nanocomposite. The results showed that the nanocomposite can be introduced as a promising catalyst in Li–air cells.
KeywordsLi-air battery Air electrode Co3O4 RuO2 Catalyst Composite
This work was supported by the National Research Foundation of Korea Grant funded by the Korean Government(MEST) (NRF-2009-C1AAA001-0094219) and a basic research program (11_EN-03) through the Daegu-Gyeongbuk Institute of Science and Technology (DGIST) funded by the Ministry of Education, Science and Technology (MEST). This work was also supported by Kyonggi University's Graduate Research Assistantship 2012.”
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