title: Hierarchical mesoporous perovskite La0.5Sr0.5CoO2.91 nanowires with ultrahigh capacity for Li-air batteries.
abstract: Lithium-air batteries have captured worldwide attention due to their highest energy density among the chemical batteries. To provide continuous oxygen channels, here, we synthesized hierarchical mesoporous perovskite La(0.5)Sr(0.5)CoO(2.91) (LSCO) nanowires. We tested the intrinsic oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) activity in both aqueous electrolytes and nonaqueous electrolytes via rotating disk electrode (RDE) measurements and demonstrated that the hierarchical mesoporous LSCO nanowires are high-performance catalysts for the ORR with low peak-up potential and high limiting diffusion current. Furthermore, we fabricated Li-air batteries on the basis of hierarchical mesoporous LSCO nanowires and nonaqueous electrolytes, which exhibited ultrahigh capacity, ca. over 11,000 mAh⋅g(-1), one order of magnitude higher than that of LSCO nanoparticles. Besides, the possible reaction mechanism is proposed to explain the catalytic activity of the LSCO mesoporous nanowire.
authors.affiliation: State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,  Wuhan University of Technology, Wuhan 430070,  China.
authors.forename: Yunlong
authors.initials: Y
authors.lastname: Zhao
authors.forename: Lin
authors.initials: L
authors.lastname: Xu
authors.forename: Liqiang
authors.initials: L
authors.lastname: Mai
authors.forename: Chunhua
authors.initials: C
authors.lastname: Han
authors.forename: Qinyou
authors.initials: Q
authors.lastname: An
authors.forename: Xu
authors.initials: X
authors.lastname: Xu
authors.forename: Xue
authors.initials: X
authors.lastname: Liu
authors.forename: Qingjie
authors.initials: Q
authors.lastname: Zhang