Liu, G.Chen, H.Xia, L.Wang, S.Ding, L.Li, D.Xiao, K.Dai, S.Wang, H.2016-08-242016-08-242015ACS applied materials & interfaces, 2015; 7(40):22478-224861944-82441944-8252http://hdl.handle.net/2440/100639Perovskites show excellent specific catalytic activity toward both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in alkaline solutions; however, small surface areas of the perovskites synthesized by traditional sol−gel methods lead to low utilization of catalytic sites, which gives rise to poor Li−O2 batteries performance and restricts their application. Herein, a hierarchical mesporous/macroporous perovskite La0.5Sr0.5CoO3‑x (HPN-LSC) nanotube is developed to promote its application in Li−O2 batteries. The HPNLSC nanotubes were synthesized via electrospinning technique followed by postannealing. The as-prepared HPN-LSC catalyst exhibits outstanding intrinsic ORR and OER catalytic activity. The HPN-LSC/KB electrode displays excellent performance toward both discharge and charge processes for Li−O2 batteries, which enhances the reversibility, the round-trip efficiency, and the capacity of resultant batteries. The synergy of high catalytic activity and hierarchical mesoporous/macroporous nanotubular structure results in the Li−O2 batteries with good rate capability and excellent cycle stability of sustaining 50 cycles at a current density of 0.1 mA cm−2 with an upperlimit capacity of 500 mAh g−1. The results will benefit for the future development of high-performance Li−O2 batteries using hierarchical mesoporous/macroporous nanostructured perovskite-type catalysts.enCopyright © 2015 American Chemical SocietyBifunctional catalystselectrospinninghierarchical mesoporous/macroporous nanotubeslithium−oxygen batteriesperovskitesJournal article003003799810.1021/acsami.5b065870003630015000442-s2.0-84944315816218487