Preparation and electrochemical properties of Pt-Ru/Mn3O4/C bifunctional catalysts for lithium-air secondary battery

Inyeong Park, Taewoo Kim, Hyelee Park, Minho Mun, Sang Eun Shim, Sung Hyeon Baeck

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Pt-based materials are generally recognized as promising electrocatalysts for use in Li-air batteries, but their high cost and scarcity present limiting factors for practical application. Therefore, catalyst costs need to be reduced by either replacing Pt with less expensive materials or by increasing the Pt dispersion. Herein, we report the fabrication of a Pt-Ru/Mn3O4/C composite as a relatively low cost and highly-efficient catalyst for use in Li-air battery cathodes. Mn3O4/C composites were first synthesized via simple precipitation methods. Pt-Ru nanoparticles were subsequently deposited onto the as-synthesized Mn3O4/C materials via impregnation-reduction methods. Results showed that Pt-Ru nanoparticles were uniformly dispersed onto the Mn3O4/C surface as made evident via transmission electron microscopy. The prepared Pt-Ru/Mn3O4/C catalyst was employed as an air-cathode material for Li-Air batteries, exhibiting not only high electrocatalytic performance but also an improved cyclability up to 130 cycles, compared to a physically-mixed catalyst composite.

Original languageEnglish
Pages (from-to)10453-10458
Number of pages6
JournalJournal of Nanoscience and Nanotechnology
Volume16
Issue number10
DOIs
StatePublished - Oct 2016

Bibliographical note

Publisher Copyright:
Copyright © 2016 American Scientific Publishers All rights reserved.

Keywords

  • Air electrode
  • Composite catalyst
  • Cycle performance
  • Lithium-air battery

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