Perovskite Sr 0.9 Y 0.1 CoO 3-δ Nanorods Modified with CoO Nanoparticles as a Bifunctional Catalyst for Rechargeable Li-O 2 Batteries

Journal article (2018)

Authors

J. Wang Chinese Academy of Sciences, University of Chinese Academy of Sciences
Xiaopeng Cheng Beijing University of Technology
Z. Li RST/Storage of Electrochemical Energy - AS
Meng Xu University of Science and Technology Beijing
Y. Lu Chinese Academy of Sciences, University of Chinese Academy of Sciences
Shengming Liu University of Science and Technology Beijing, Chinese Academy of Sciences
Yuefei Zhang Beijing University of Technology
Chunwen Sun University of Chinese Academy of Sciences, Guangxi University, Chinese Academy of Sciences
Research Group
RST/Storage of Electrochemical Energy (AS) (TU Delft)
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Published Date

2018

Language

English

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Faculty

Applied Sciences

Department

RST/Radiation, Science and Technology

Research Group

RST/Storage of Electrochemical Energy

Abstract


For practical application of lithium-oxygen batteries, one of the challenges is the development of efficient bifunctional electrocatalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in cathode. In this work, perovskite Sr
0.9
Y
0.1
CoO
3-δ
nanorods are synthesized by an electrospinning method. The performance of the Li-O
2
cell with Sr
0.9
Y
0.1
CoO
3-δ
catalysts is better than that of the cell only with Super-P. Furthermore, modification of CoO nanoparticles on the cathode can provide an obviously improved electrochemical performance with a reduced voltage gap (∼80-140 mV), which is ascribed to the superior catalytic activity of CoO nanoparticles toward OER. All of these results demonstrate that the perovskite Sr
0.9
Y
0.1
CoO
3-δ
is an efficient bifunctional electrocatalyst for lithium-oxygen batteries, and the incorporation of CoO nanoparticles is an effective approach for improving the cathode performance as well.

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