Tailored combination of low dimensional catalysts for efficient oxygen reduction and evolution in Li-O2 batteries

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Ki Ro Yoon
  • Dae Sik Kim
  • Won-Hee Ryu
  • Sung Ho Song
  • Doo-Young Youn
  • Ji-Won Jung
  • Yong Joon Park
  • Il-Doo Kim

Detail(s)

Original languageEnglish
Pages (from-to)2080-2088
Journal / PublicationChemSusChem
Volume9
Issue number16
Online published25 Jul 2016
Publication statusPublished - 23 Aug 2016
Externally publishedYes

Abstract

The development of efficient bifunctional catalysts for the oxygen reduction reaction (ORR) and oxygen evolution reac-tion (OER) is a key issue pertaining high performance Li-O2 batteries. Here, we propose a heterogeneous electrocatalyst consisting of LaMnO3 nanofibers (NFs) functionalized with RuO2 nanoparticles (NPs) and non-oxidized graphene nano-flakes (GNFs). The Li-O2 cell employing the tailored catalysts delivers an excellent electrochemical performance, affording significantly reduced discharge/charge voltage gaps (1.0 V at 400 mAg-1), and superior cyclability for over 320 cycles. The outstanding performance arises from (1)the networked LaMnO3 NFs providing ORR/OER sites without severe aggrega-tion, (2) the synergistic coupling of RuO2 NPs for further improving the OER activity and the electrical conductivity on the surface of the LaMnO3 NFs, and (3) the use of GNFs providing a fast electronic pathway as well as improved ORR kinetics.

Research Area(s)

  • Graphenes, Lithium-oxygen batteries, Nanofibers, Perovskites, Ruthenium oxides

Citation Format(s)

Tailored combination of low dimensional catalysts for efficient oxygen reduction and evolution in Li-O2 batteries. / Yoon, Ki Ro; Kim, Dae Sik; Ryu, Won-Hee; Song, Sung Ho; Youn, Doo-Young; Jung, Ji-Won; Jeon, Seokwoo; Park, Yong Joon; Kim, Il-Doo.

In: ChemSusChem, Vol. 9, No. 16, 23.08.2016, p. 2080-2088.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review