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

Jie Wang, Xiaopeng Cheng, Zhaolong Li, Meng Xu, Yao Lu, Shengming Liu, Yuefei Zhang, Chunwen Sun

Research output: Contribution to journalArticleScientificpeer-review

9 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)5557-5566
JournalACS Applied Energy Materials
Volume1
Issue number10
DOIs
Publication statusPublished - 2018

Keywords

  • cycling stability
  • electrochemical properties
  • electrospinning
  • Li-O batteries
  • Sr Y CoO

Fingerprint Dive into the research topics of 'Perovskite Sr <sub>0.9</sub> Y <sub>0.1</sub> CoO <sub>3-δ</sub> Nanorods Modified with CoO Nanoparticles as a Bifunctional Catalyst for Rechargeable Li-O <sub>2</sub> Batteries'. Together they form a unique fingerprint.

  • Cite this