Abstract
The exploitation of efficient electrocatalysts with specific morphology toward oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is crucial for Li–O2 batteries (LOBs). Perovskites are among the most promising electrocatalyst candidates mainly due to their tunable structure and facile preparation. In this study, porous double-doped La0.6Ca0.4Fe0.8Ni0.2O3 (LCFN) nanotubes are prepared by a facile electrospinning method combined with subsequent calcination treatment. The leaf-like Li2O2 is loosely and uniformly packed on the surface of the LCFN nanotube, which provides the channels for electronic and ion transport for the decomposition of Li2O2 during the charge process of the LOBs. The LOB with LCFN catalyst exhibits a higher specific discharge capacity of 13019 mAh g−1 than that with Super P carbon catalyst. And it can cycle stably up to 139 times at capacity limitation of 500 mAh g−1. Therefore, the porous LCFN nanotubes electrocatalyst shows prospective application for LOBs.
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