Perovskite La0.6Sr0.4Co0.2Fe0.8O3 as an effective electrocatalyst for non-aqueous lithium air batteries

Junfang Cheng, Ming Zhang, Yuexing Jiang, Lu Zou, Yingpeng Gong, Bo Chi*, Jian Pu, Li Jian

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)

Abstract

Non-aqueous lithium air batteries with high energy density have been regarded to be the most attractive contender in the future energy storage techniques. Herein, the perovskite La0.6Sr0.4Co0.2Fe0.8O3 (LSCF) nanoparticles are studied as the cathode catalyst for non-aqueous lithium air batteries. The results confirm that nanostructured LSCF exhibits admirable electrochemical activity and can effectively reduce the overpotential. Batteries with LSCF catalyst can increase the discharge capacity from 9678 mAh g-1 to 13979 mAh g-1 and improve the cycle stability from 10 cycles to 20 cycles at 200 mA g-1. The study reveals that the formation and decomposition processes of Li2O2 can be effectively promoted by the introduction of LSCF nanoparticles. The possible catalytic mechanism of LSCF in reducing overpotential is also proposed.

Original languageEnglish
Pages (from-to)106-115
Number of pages10
JournalElectrochimica Acta
Volume191
DOIs
Publication statusPublished - 2016 Feb 10
Externally publishedYes

Keywords

  • Catalytic mechanism
  • Electrochemical activity
  • Lithium air batteries
  • Overpotential
  • Perovskite LSCF

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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