摘要： Rational design and synthesis of cathode catalysts are crucial for enhancing the performance of rechargeable Li–O 2 batteries. Here, we report a controlled synthesis of the nanocomposite, Co 3 O 4 nanohorns coated with MnO 2 nanosheets on a Ni foam (Co 3 O 4 MnO 2 /Ni). It integrates the catalytic activities of oxygen reduction and oxygen evolution reactions and functions as a carbon- and binder-free cathode catalyst for rechargeable Li–O 2 batteries. This nanocomposite catalyst presents a small discharge/charge voltage gap of 0.76 V (a low polarization) and a long cycle life of 170 cycles at 300 mA g −1 , coupled with an ionic liquid-based electrolyte, 0.5 M lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) in 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide (EMITFSI), which are much better than those based on the individual Co 3 O 4 and MnO 2 cathodes. The enhanced electrochemical performance is ascribed to the integrated bifunctional catalytic activities and the porous micro/nanostructure of the Co 3 O 4 MnO 2 /Ni nanocomposite, as well as the ionic liquid-based electrolyte, indicating its promising application in rechargeable Li–O 2 batteries. 出版日期： 2016 出處： Inorganic chemistry frontiers, 2016, Vol.3 (6), p.866-871 資源來源： Royal Society of Chemistry 識別號： ISSN: 2052-1553 識別號： EISSN: 2052-1553 識別號： DOI: 10.1039/C6QI00066E
