%0 Journal Article %T Superior Performance of a Li–O 2 Battery with Metallic RuO 2 Hollow Spheres as the Carbon‐Free Cathode %A Li, Fujun %A Tang, Dai‐Ming %A Zhang, Tao %A Liao, Kaiming %A He, Ping %A Golberg, Dmitri %A Yamada, Atsuo %A Zhou, Haoshen %J Advanced Energy Materials %V 5 %N 13 %P n/a-n/a %@ 1614-6832 %D 2015-07-01 %I Wiley Subscription Services, Inc., A Wiley Company %~ DeepDyve