Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6611700 | Electrochimica Acta | 2015 | 7 Pages |
Abstract
The electrochemical performance of one-dimensional porous La0.5Sr0.5CoO2.91 nanotubes as a cathode catalyst for rechargeable nonaqueous lithium-oxygen (Li-O2) batteries is reported here for the first time. In this study, one-dimensional porous La0.5Sr0.5CoO2.91 nanotubes were prepared by a simple and efficient electrospinning technique. These materials displayed an initial discharge capacity of 7205 mAh gâ1 with a plateau at around 2.66 V at a current density of 100 mA gâ1. It was found that the La0.5Sr0.5CoO2.91 nanotubes promoted both oxygen reduction and oxygen evolution reactions in alkaline media and a nonaqueous electrolyte, thereby improving the energy and coulombic efficiency of the Li-O2 batteries. The cyclability was maintained for 85 cycles without any sharp decay under a limited discharge depth of 1000 mAh gâ1, suggesting that such a bifunctional electrocatalyst is a promising candidate for the oxygen electrode in Li-O2 batteries.
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Authors
Pengfa Li, Jiakai Zhang, Qilin Yu, Jinshuo Qiao, Zhenhua Wang, David Rooney, Wang Sun, Kening Sun,