Synthesis of Fe2O3 nanoparticle-decorated n-doped reduced graphene Oxide as an Effective Catalyst for Zn-Air Batteries

Peng Tan, Bin Chen, Haoran Xu, Weizi Cai, Wei He, Meina Chen, Meng Ni

Research output: Journal article publicationJournal articleAcademic researchpeer-review

7 Citations (Scopus)

Abstract

The advancement of Zn-air batteries requires effective and inexpensive electrocatalysts that facilitate the oxygen reduction reaction (ORR) and evolution reaction (OER).Herein,we report an effective electrocatalyst of Fe2O3 nanoparticle-decorated N-doped reduced graphene oxide (Fe2O3/N-rGO), in which porous Fe2O3 nanoparticles of ∼37 nm are anchored on the N-rGO surface uniformly. In an alkaline solution, the synthesized Fe2O3/N-rGO affords superior ORR and OER activity in comparison with Fe2O3 and N-rGO, demonstrating the reinforced synergistic effect. Moreover, it exhibits a comparable limiting current density and a higher current retention ratio in the ORR than commercial Pt/C. A Zn-air battery with Fe2O3/N-rGO delivers a peak power density of 80.1 mW cm-2, and the energy density reaches 730.2 Wh kgZn-1. In addition, stable voltage gaps of ∼0.91 V during discharge and charge are achieved at 5 mA cm-2, and the energy efficiency is maintained at i60% over 120 cycles, illustrating the remarkable stability for rechargeable Zn-air batteries.

Original languageEnglish
Pages (from-to)A616-A622
JournalJournal of the Electrochemical Society
Volume166
Issue number4
DOIs
Publication statusPublished - Feb 2019

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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