title: Core-shell-structured CNT@RuO(2) composite as a high-performance cathode catalyst for rechargeable Li-O(2) batteries.
abstract: A RuO2 shell was uniformly coated on the surface of core CNTs by a simple sol-gel method, and the resulting composite was used as a catalyst in a rechargeable Li-O2 battery. This core-shell structure can effectively prevent direct contact between the CNT and the discharge product Li2 O2 , thus avoiding or reducing the formation of Li2 CO3 , which can induce large polarization and lead to charge failure. The battery showed a high round-trip efficiency (ca. 79 %), with discharge and charge overpotentials of 0.21 and 0.51 V, respectively, at a current of 100 mA gtotal (-1) . The battery also exhibited excellent rate and cycling performance.
authors.affiliation: Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Umezono 1-1-1, Tsukuba, 305-8568 (Japan).
authors.forename: Zelang
authors.initials: Z
authors.lastname: Jian
authors.forename: Pan
authors.initials: P
authors.lastname: Liu
authors.forename: Fujun
authors.initials: F
authors.lastname: Li
authors.forename: Ping
authors.initials: P
authors.lastname: He
authors.forename: Xianwei
authors.initials: X
authors.lastname: Guo
authors.forename: Mingwei
authors.initials: M
authors.lastname: Chen
authors.forename: Haoshen
authors.initials: H
authors.lastname: Zhou
keywords: bifunctional catalysts; carbon nanotubes; core-shell structures; lithium-air batteries; ruthenium