Doping optimization mechanism of a bi-functional perovskite catalyst La0.8Sr0.2Co0.8Ni0.2O3-δ for Li–O2 battery cathode

Junfang Cheng, Ziling Wang, Lu Zou, Ming Zhang, Guozhu Zhang, Yabin Dong, Yuexing Jiang, Yizhen Huang, Naotoshi Nakashima, Bo Chi

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Perovskite oxides with low cost and high catalytic activity are reported as suitable cathode catalysts for the Li–O2 batteries (LOBs), while their catalytic mechanism is not yet fully clarified. Herein, La0.8Sr0.2Co0.8Ni0.2O3-δ (LSCN8282) perovskite oxide is used as a cathode catalyst for the LOBs and further improved by adjusting the Co/Ni ratio in the B-site. Thus, La0.8Sr0.2Co0.6Ni0.4O3-δ (LSCN8264) and La0.8Sr0.2Co0.4Ni0.6O3-δ (LSCN8246) are also synthesized and used as cathode catalysts for the LOBs. Among the obtained perovskite catalysts in this study, LSCN8264 shows the highest electrochemical activity in 1 M KOH and best catalytic effectivity when used in the LOBs. The catalytic mechanism and doping optimization are clarified by analyzing the morphology of the discharge products and the X-ray photoelectron spectroscopy (XPS) of the perovskite oxides.

Original languageEnglish
Article number154728
JournalJournal of Alloys and Compounds
Volume831
DOIs
Publication statusPublished - 2020 Aug 5
Externally publishedYes

Keywords

  • Catalytic mechanism
  • Doping optimization
  • Li–O batteries
  • Perovskite LSCN

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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